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IC-CAP Functions

This chapter describes the IC-CAP functions. They appear in alphabetical order.

When reviewing the functions, keep in mind the following points:

•	Many functions can be called from within a Program or Macro. Several examples are provided here; additional examples can be found in Calls to the Function Library.

•	The list does not represent all the functions available in a Program or Macro. Additional built-in functions are available in the Parameter Extraction Language. Refer to Built-in Functions.

•	For consistency, the argument names listed for each function reflect the descriptive labels these arguments would get in a standalone Transform editor.

•	The Input Arguments referred to as Strings/Pars/Vars can be any of the following alternatives: string expressions, Model parameter names, DUT parameter names, or IC-CAP system variable names.

The tables that follow list the available functions by category, as they appear in the program.

8753_TRL_Cal

Deembed the raw measured data using measured data of TRL (thru-reflect-line) calibration standards. The function calculates and downloads the error coefficients to the 8753. The reference plane is defined at the middle of the thru standard, or at the interface to the DUT when it is installed in the compatible carrier.

Inputs:

   Freq Data:

Frequency Inputs

   Thru:

measured S-parameters of the Thru standard

   Short:

measured S-parameters of the Short standard

Line A:

measured S-parameters of Line A standard

Line B:

measured S-parameters of Line B standard

Line C:

measured S-parameters of Line C standard

Freq 1 Trans:

transition frequency Line A to Line B

Freq 1 Trans:

transition frequency Line B to Line C

Outputs:

None

abs

Absolute value function (magnitude when input data is complex)

Input Arguments:

Data Sets:

Input 1

Output:

Real number, matrix, real array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

acs

Inverse cosine in radians.

Input Arguments:

Data Sets:

Input 1

Output:

Complex number, matrix, complex array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

acsh

Inverse hyperbolic cosine.

Input Arguments:

Data Sets:

Input 1

Output:

Complex number, matrix, complex array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

AgilentHBT_ABCX_extract

This function extracts model parameter ABCX.

Input Arguments:

Variables:

Emitter Area, Total Area

Parameters:

Parameter(ABCX)

Extracts:

ABCX

AgilentHBT_calculate_ccb

This function calculates Cbc in an alternative method from the specified Z-parameters.

Input Arguments:

Inputs:

freq, Z11, Z12, Z21, Z22

Output:

Complex data sets.

AgilentHBT_calculate_rbb

This function calculates Rb in an alternative method from the specified H-parameters.

Input Arguments:

   Inputs:

freq, H11, H12, H21, H22

   Variables:

Mode (0:ignore RE effect, 1:include RE effect)

   Parameters:

Parameter(RE)

Output:

Complex data sets

AgilentHBT_CCMAX_extract

This function extracts model parameter CCMAX.

Input Arguments:

Inputs:

Vbc (as positive value), Cbc

Parameters:

Parameter(CCMAX), Parameter(VJC)

Extracts:

CCMAX

AgilentHBT_CEMAX_extract

This function extracts model parameter CEMAX.

Input Arguments:

Inputs:

Vbe, Cbe

Parameters:

Parameter(CEMAX), Parameter(VJE)

Extracts:

CEMAX

AgilentHBT_CJC_extract

This function extracts model parameter CJC.

Input Arguments:

Inputs:

Vbc (as positive value), Cbc

Parameters:

Parameter(CJC), Parameter(CPBC)

Extracts:

CJC

AgilentHBT_CJE_extract

This function extracts model parameter CJE.

Input Arguments:

Inputs:

Vbe, Cbe

Parameters:

Parameter(CJE), Parameter(CPBE)

Extracts:

CJE

AgilentHBT_IS_NF_extract

This function extracts model parameters IS, NF.

Input Arguments:

   Inputs:

Vbe, Ic

   Variables:

X Low, X High, Y Low, Y High, TEMP

   Parameters:

Parameter(IS), Parameter(NF)

Extracts:

IS, NF

AgilentHBT_ISC_NC_extract

This function extracts model parameters ISC, NC.

Input Arguments:

   Inputs:

Vcb (as positive value), Ib

   Variables:

X Low, X High, Y Low, Y High, TEMP

   Parameters:

Parameter(ISC), Parameter(NC)

Extracts:

ISC, NC

AgilentHBT_ISE_NE_extract

This function extracts model parameters ISE, NE.

Input Arguments:

   Inputs:

Vbe, Ib

   Variables:

X Low, X High, Y Low, Y High, TEMP

   Parameters:

Parameter(ISE), Parameter(NE)

Extracts:

ISE, NE

AgilentHBT_ISH_NH_extract

This function extracts model parameters ISH, NH.

Input Arguments:

   Inputs:

Vbe, Ib

   Variables:

X Low, X High, Y Low, Y High, TEMP

   Parameters:

Parameter(ISH), Parameter(NH)

Extracts:

ISH, NH

AgilentHBT_ISR_NR_extract

This function extracts model parameters ISR, NR.

Input Arguments:

   Inputs:

Vcb (as positive value), Ie

   Variables:

X Low, X High, Y Low, Y High, TEMP

   Parameters:

Parameter(ISR), Parameter(NR)

Extracts:

ISR, NR

AgilentHBT_ISRH_NRH_extract

This function extracts model parameters ISRH, NRH.

Input Arguments:

   Inputs:

Vcb (as positive value), Ib

   Variables:

X Low, X High, Y Low, Y High, TEMP

   Parameters:

Parameter(ISRH), Parameter(NRH)

Extracts:

ISRH, NRH

AgilentHBT_ITC_ITC2_extract

This function extracts model parameters ITC, ITC2.

Input Arguments:

   Inputs:

Ic, Ft, Vc, Vb

   Variables:

X Low, X High, Y Low, Y High

   Parameters:

Parameter(ITC), Parameter(ITC2)

Extracts:

ITC, ITC2

AgilentHBT_Param_Init

This function initializes the model parameters for the extraction.

Input Arguments:

Variables:

Emitter Width (W) [um]
Emitter Length (L) [um]
# of Emitter Fingers (NF)
Total Area [um^2]

Parameters:

Parameter(hbt.TNOM)

Extracts:

All Agilent-HBT model parameters

AgilentHBT_TFC0_extract

This function extracts model parameter TFC0.

Input Arguments:

   Inputs:

Ic or Ic^-1, Tau, Vc, Vb

   Variables:

X Low, X High, Y Low, Y High

   Parameters:

Parameter(TFC0)

Extracts:

TFC0

AgilentHBT_VJC_extract

This function extracts model parameter VJC.

Input Arguments:

Inputs:

Vbc (as positive value), Cbc, Cdiff

Parameters:

Parameter(VJC), Parameter(CJC), Parameter(CPBC)

Extracts:

VJC

AgilentHBT_VJE_extract

This function extracts model parameter VJE.

Input Arguments:

Inputs:

Vbe, Cbe, Cdiff

Parameters:

Parameter(VJE), Parameter(CJE), Parameter(CPBE)

Extracts:

VJE

arg

Argument (phase angle), in radians, for a complex number.

Input Arguments:

Data Sets:

Input 1

Output:

Real number, matrix, real array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

ascii$

Converts ascii-coded characters into literal characters as entered into a text box.

If certain characters are entered in a text box, they must be encoded so they are compatible with the .mdl file format used in variable tables. These characters include double quotes (") and newlines (\n). Such characters may be entered in a GUI's edit box and tracked by a variable table variable. IC-CAP must encode these characters before storing them in a .mdl file to avoid undesirable effects.

After the characters are encoded, they appear as encoded characters if you choose to print them from the .mdl file to an output such as the Status window. To translate the encoding, call the function ascii$() in PEL and the string will be output exactly as it was typed into the text box.

asn

Inverse sine in radians.

Input Arguments:

Data Sets:

Input 1

Output:

Complex number, matrix, complex array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

asnh

Inverse hyperbolic sine.

Input Arguments:

Data Sets:

Input 1

Output:

Complex number, matrix, complex array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

atn

Inverse tangent in radians.

Input Arguments:

Data Sets:

Input 1

Output:

Complex number, matrix, complex array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

atnh

Inverse hyperbolic tangent.

Input Arguments:

Data Sets:

Input 1

Output:

Complex number, matrix, complex array, or matrix array (depends on input argument)

Automatic Invocation:

On Data Set Input Change

autofit

Performs an automatic line fit to a set of X and Y data sets. This function finds the largest region of the line that fits with less than the specified error from the RMS limit field. A buffer can be specified that removes a certain percentage of the data from each end of the curve. This eliminates data points that may throw off the line fit. The percentages should be specified out of 1. For example, 0.01 = 1%. If the OVERRIDE_LIMITS variable is TRUE, the limits can be specified manually with the X_LOW and X_HIGH variables, which can be set from the Plot menu.

This function should only be used on data with a single sweep variable. A 3 point data set, containing slope and intercept data and the regression coefficient, is returned.

Input Arguments:

Data Sets:

X Data, Y Data

Reals or Integers:

RMS limit, Buffer

Output:

Array of 2 points: slope then intercept

Automatic Invocation:

None

Example PEL Statement:

fit_data = autofit(-ve,log(ic.m),0.01,0.1)

B2200_bias_card_enable

Bias-enables all the output ports of the specified card. By default, all ports are bias-enabled after a reset.

Syntax

B2200_bias_card_enable(<addr>, <CardNumber>, <CardState>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<CardState> is the card output port's state (allowed values are "ENABLE", "DISABLE", "E", or "D").

B2200_bias_ch_enable

Bias-enables specific output ports in the channel list for the specified card. The input ports specified in the channel list are ignored since the input port is always the Bias Input Port. By default, all the outputs are bias-enabled after a reset.

Syntax

B2200_bias_ch_enable(<addr>,<CardNumber>,<State>, <Channel list>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<State> is the output port's state (allowed values are "ENABLE", "DISABLE", "E", or "D")

<Channel list> is the list of channels, known as connection routes. Example channel list: (@10102, 10203, 10305:10307)

B2200_bias_enable

Enables the bias mode for the specified card once Input Bias Port and Enabled Output ports are specified. When Bias Mode is ON, the Input Bias Port is connected to all Bias Enabled output ports that are not connected to any other input ports. Bias Disabled output ports are never connected to an Input Bias Port when Bias Mode is ON.

If another input port is disconnected from a bias enabled output port, this port is automatically connected to the Input Bias Port.

If another input port is connected to a Bias Enabled output port, the output port is automatically disconnected from the Bias Input Port. When Bias Mode is OFF, the Input Bias Port is the same as the other ports.

Syntax

B2200_bias_enable(<addr>, <CardNumber>, <mode>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<mode> is "On", "Off", "1", or "0".

B2200_bias_init

Selects the Input Bias Port for the specified card. The Input Bias Port is the dedicated bias port.

Syntax

B2200_bias_init(<addr>, <CardNumber>, <InputBiasPort>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<InputBiasPort> is 1 to 14 (numeric input) or -1 to disable bias port.

B2200_close_interface

Closes the current interface, which was opened by calling B2200_open_interface().

B2200_connect

Connects or disconnects specified channels. Bias Mode and coupling Mode are also taken into account when a channel is closed or opened.

For example, in the list (@10102, 10203:10205), the following channels are connected or disconnected on card 1. Input port 1 to output port 2. Input port 2 to output port 3 and 5.

Syntax

B2200_connect(<addr>,<Connect/Disconnect>,<ChannelList>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<Connect/Disconnect> is C or D.

<ChannelList> is the list of connections to close.

B2200_couple_enable

Enables or disables Couple Port mode. Couple Port mode allows synchronized connection of two adjacent input ports to two adjacent output ports.

Syntax

B2200_couple_enable(<addr>, <CardNumber>, <Mode>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<mode> is "On", "Off", "1", or "0".

B2200_couple_setup

Selects the couple ports for Kelvin connections. At Reset, no input ports are coupled.

Syntax

B2200_couple_setup( <addr>,<CardNumber>, <ListOfCoupledPorts>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<ListOfCoupledPorts> is the list of odd number input channels (e.g., "1, 3, 5" means coupled ports are 1-2, 3-4, 5-6).

B2200_debug

Prints out all command strings sent to the instrument when set to 1. This flag is common to all B2200A's on the bus, regardless of their GPIB address.

Syntax

B2200_debug(<flag>)

Where

<flag> is "1", "0", "Yes", or "No".

B2200_disconnect_card

Opens all relays or channels in the specified cards.

Syntax

B2200_disconnect_card(<addr>, <CardNumber>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

B2200_GPIB_handler

Returns -1 if the interface has not been initialized (invalid handler). Returns a positive integer (handler) if the interface has been opened.

Returns the current interface handler. The function is provided as a utility function, which enables you to write advanced PEL code to write and read data to the B2200A using the HPIB_write and HPIB_read functions. Initializing the handler using B2200_open_interface enables you to use B2200A's built-in driver functions as well as writing PEL code to support other features that are not currently supported by the built-in functions, all in the same PEL code.

B2200_ground_card_enable

Enables ground-enabling for all the output ports of the specified card. By default, all ports are ground-disabled.

Syntax

B2200_ground_card_enable(<addr>,<CardNumber>,<CardState>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<CardState> is the card output port's state (allowed values are "ENABLE", "DISABLE", "E", or "D").

B2200_ground_enable

Enables the bias mode for the specified card. When Ground Mode is turned ON, the Input Ground Port (default is 12) is connected to all the Ground Enabled input/output ports that have not been connected to any other port. At Reset, Ground Mode is OFF. Ground Mode cannot be turned ON when Bias Mode is ON.

See the Agilent B2200 User's Guide for additional comments and restrictions.

Syntax

B2200_ground_enable(<addr>, <CardNumber>, <mode>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, 4.

<mode> is "On", "Off", "1", or "0".

B2200_ground_init

Selects the input Ground Port for the specified card. For each card, you can specify the same or a different Ground Port. By default, the input Ground Port is port 12. The ground port should be connected to 0 V output voltage. See the Agilent B2200 User's Guide for details.

Syntax

B2200_ground_init(<addr>,<CardNumber>,<InputGroundPort>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<InputGroundPort> is 1 to 14 (numeric input) or -1 to disable ground port.

B2200_ground _outch_enable

Ground-enables or ground-disables output ports. When Ground Mode is turned ON, the ground-enabled output ports that have not been connected to any other input port are connected to the input ground port. The input ports specified in channel lists are ignored since the input port is always the Input Ground Port. By default, all the outputs are ground-disabled after a reset.

Syntax

B2200_ground _outch_enable(<addr>,<CardNumber>,<State>, <Channel list>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, or 4.

<State> is the port's state (allowed values are "ENABLE", "DISABLE", "E", or "D").

<Channel list> is the list of channels, known as connection routes. Example channel list: (@10102, 10203, 10305:10307)

B2200_ground _unused_inputs

Specifies the ground-enabled (or unused) input ports for the specified card. When Ground Mode is turned ON, the ground-enabled input ports that have not been connected to any other port are connected to the input Ground Port. By default, all the inputs are ground-disabled after a reset.

Syntax

B2200_ground _unused_inputs(<addr>,<CardNumber>,<Input Channels>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<CardNumber> is 0(auto), 1, 2, 3, 4.

<Input Channels> is the list of input channels (e.g., "1, 2, 5"). Only input ports 1 to 8 can be defined as unused (these are the input Kelvin Ports).

B2200_init

Must be run first in the PEL program to initialize the instrument and set the configuration mode. When the instrument is in AUTO configuration mode and multiple plug-in cards are installed in the B2200 slots from slot 1 continuously, the installed cards are then treated as one card (numbered 0). This function resets all the settings to factory default before setting the configuration mode.

This function also sets the default connection rule for the specified card. When the connection rule is FREE (default mode), each input port can be connected to multiple output ports and each output port can be connected to multiple input ports. When the connection is SINGLE, each input port can be connected to only one output. Connection sequence specifies the open/close sequence of the relays when changing from an existing connection to a new connection.

Syntax

B2200_init( <addr>, <cardNumber>, <config>, <connectionRule>, <connectionSequence>)

Where

<addr> is the GPIB address of the Mainframe (must be a positive number from 1 to 30).

<cardNumber> is 0(auto), 1, 2, 3, or 4.

<config> is "AUTO" or "NORMAL" (string input).

<connectionRule> is "FREE" or "SINGLE".

<connectionSequence> is "NSEQ", "BBM", or "MBBR".

•

NSEQ (No SEQuence): Disconnect old route, connect new route.

•

BBM (Break Before Make): Disconnect old route, wait, connect new route.

•

MBBR (Make Before BReak): Connect new route, wait, disconnect old route.

B2200_open_interface

Opens and initializes the GPIB interface and must be run first in the PEL program. The interface handler is saved in a static variable so that the interface will be shared by all the other B2200's function calls. You can drive multiple B2200 instruments as long as they are on the same interface bus (obviously, they must have different addresses).

Syntax

B2200_open_interface(<Interface Name>)

Where

<Interface Name> is the name of the GPIB interface.

BJT_dc_model

Calculates collector current (IC), base current (IB) or gain (BETA) versus terminal voltages for a bipolar transistor using the UCB DC bipolar model. Set the Output field to IC, IB, or BETA. Use this function in place of an actual simulation for fast optimizations. The source code for this function is provided as an example in the userc.c file.

Input Arguments:

Data Sets:

VC, VB, VE

Strings/Pars/Vars

Output

Output:

Array of real numbers; size determined by inputs

Automatic Invocation:

None

BJTAC_high_freq

Standard extraction for the UCB Bipolar model. Extracts AC parameters from a common emitter measurement of H-parameters. Requires the following setup:

H versus V_be, with V_ce = 1V and 3V, and Freq constant.

The frequency value must be past the pole frequency of the device. Optimization can be used to tune the parameter values; typically, it should not be required.

Input Arguments:

Data Sets:

Base Voltage, Frequency, Col Voltage, Sub Voltage, H-Par Output

Output:

None

Extracts:

TF, ITF, XTF, VTF, PTF

Automatic Invocation:

By Extract menu function

BJTAC_rb_rbm_irb

Standard extraction for the UCB Bipolar model. Extracts base resistance parameters from a common emitter measurement of H₁₁. Requires the following setups:

I_b versus V_be, with V_ce = constant
H₁₁ versus Freq versus V_be, with V_ce = constant

Input Arguments:

Data Sets:

IB Data, RBB Data

Output:

None

Extracts:

RB, RBM, IRB

Automatic Invocation:

By Extract menu function

BJTCV_stoc

Calculates capacitance data from S-parameter data using the following equations:

Cbc(Vbc) = - imag(Y12)/(2*pi*freq)

Cbe(Vbe) = imag(Y11)/(2*pi*freq) - Cbc(Vbc)

This allows base-collector and base-emitter capacitance to be calculated from network analyzer measurements. The output of this function can be used in place of actual capacitance data to extract capacitance related parameters.

Input Arguments:

Data Sets:

FREQ data, S data

Strings/Pars/Vars:

Node (C/E)

Output:

Array of real numbers; size determined by inputs

Automatic Invocation:

On Data Set Input Change

BJTDC_fwd_gummel

Standard extraction for the UCB Bipolar model. Extracts forward Gummel parameters from forward Gummel plot measurements. Requires the following setup:

I_c and I_b versus V_be, with V_cb = 0V.

The measured data should include high and low current roll-off effects in the gain. The V_be lower limit for extraction is automatically selected. If the OVERRIDE_LIMITS variable is true, this limit can be specified manually with the X_LOW variable, which can be set from the Plot menu. Optimization can be used to tune the parameter values, but should not typically be required.

Input Arguments:

Data Sets:

Fwd VBE, Fwd IC, Fwd IB, Fwd Beta

Output:

None

Extracts:

ISE, NE, BF, IKF

Automatic Invocation:

By Extract menu function

BJTDC_is_nf

Standard extraction for the UCB Bipolar model. Extracts saturation current parameters from forward gummel plot measurements. Requires the following setup:

I_c and I_b versus V_be, with V_cb = 0V.

The V_be limits for extraction are automatically selected. If the OVERRIDE_LIMITS variable is true, these limits can be specified manually with the X_LOW and X_HIGH variables, which can be set from the Plot menu. Optimization can be used to tune the parameter values, but should not typically be required.

Input Arguments:

Data Sets:

Fwd VBE, Log10 Fwd IC

Output:

None

Extracts:

IS, NF

Automatic Invocation:

By Extract menu function

BJTDC_nr

Standard extraction for the UCB Bipolar model. Extracts NR from reverse Gummel Plot measurements. Requires the following setup:

I_e and I_b versus V_bc, with V_eb = 0V.

The Vbc limits for extraction are automatically selected. If the OVERRIDE_LIMITS variable is true, these limits can be specified manually with the X_LOW and X_HIGH variables, which can be set from the Plot menu. Optimization can be used to tune the parameter value, but should not typically be required.

Input Arguments:

Data Sets:

Rev VBC, Log10 Rev IE

Output:

None

Extracts:

NR

Automatic Invocation:

By Extract menu function

BJTDC_rc

Standard extraction for the UCB Bipolar model. Extracts collector resistance in the saturation region. Requires the following setup:

I_cversus V_ce, with V_be = typical operating value.

Depending on the device, optimization to this and other DC measurements may be required to tune the parameter value.

Input Arguments:

Data Sets:

VC Data, IC Data

Output:

None

Extracts:

RC

Automatic Invocation:

By Extract menu function

BJTDC_rcfb

Alternate extraction for the UCB Bipolar model. Extracts collector resistance using the flyback technique. Requires the following setup:

V_ec versus I_b, with the emitter floating.

Depending on the device, optimization to this and other DC measurements may be required to tune the parameter value.

Input Arguments:

Data Sets:

IB Data, VE Data

Output:

None

Extracts:

RC

Automatic Invocation:

By Extract menu function

BJTDC_re

Standard extraction for the UCB Bipolar model. Extracts emitter resistance using the flyback technique. Requires the following setup:

V_ce versus I_b, with the collector floating.

Depending on the device, optimization to this and other DC measurements may be required to tune the parameter value.

Input Arguments:

Data Sets:

IB Data, VC Data

Output:

None

Extracts:

RE

Automatic Invocation:

By Extract menu function

BJTDC_rev_gummel

Standard extraction for the UCB Bipolar model. Extracts reverse Gummel parameters from reverse Gummel plot measurements. Requires the following setup:

I_e and I_b versus V_bc, with V_eb = 0V.

The measured data should include high and low current roll-off effects in the gain. The Vbc lower limit for extraction is automatically selected. If the OVERRIDE_LIMITS variable is true, this limit can be specified manually with the X_LOW variable, which can be set from the Plot menu. Optimization can be used to tune the parameter values, but should not typically be required.

Input Arguments:

Data Sets:

Rev VBC, Rev IE, Rev IB, Rev Beta

Output:

None

Extracts:

ISC, NC, BR, IKR

Automatic Invocation:

By Extract menu function

BJTDC_vaf_var

Standard extraction for the UCB Bipolar model. Extracts forward and reverse early voltages from common emitter and common collector curves. Requires the following setups:

I_cversus V_ce versus V_be.
I_e versus V_ec versus V_bc.

The setups should have the same number of base voltage steps. The base voltages should be chosen so that current levels correspond to the peak gain regions of the device. No more than 20 percent of the data should be in the saturation region. Optimization can be used to tune the parameter values, but should not typically be required. Optimization of these parameters should be performed only after extracting the complete DC model.

Input Arguments:

Data Sets:

Forward VC, Forward VB, Forward IC, Reverse VE, Reverse VB, Reverse IE

Output:

None

Extracts:

VAF, VAR

Automatic Invocation:

By Extract menu function

BPOPAMP_macro_model

Extraction function for the Boyle-Pederson- Solomon-Cohn Opamp macromodel written in C code. (Refer to IEEE JSSC vol. SC-9, no. 6, Dec. 1974.) Extracts circuit element values for a specified set of opamp performance measurements. The data set inputs to the extraction function may be from outputs of Setups that measure the specific opamp performance or from values known via other sources such as specifications on a data sheet. The real and integer inputs are not generally measurable and are taken from the knowledge of the design of the opamp being modeled. An expanded description of the inputs is given in parentheses where applicable.

Input Arguments:

Data Sets:

Slew Rate +(V/uS), Slew Rate -(V/uS), Bias Current(Amps), Bias Offset(Amps), Volt Offset(Volts), Av(DM) (gain-no unit), BW(Hz), Excess Phase(radians), CMRR (dB), Rout(ohms), Rout-ac(ohms), Isc +(Amps), Isc -(Amps), Vout_max +(Volts), Vout_min -(Volts), Power Diss(Watts), Vcc supply(Volts), Vee supply(Volts)

Reals or Integers:

Nom. Q.IS(nominal input transistor saturation current), R2(mid-stage gain setting resistor), Comp. Cap.(compensation capacitance), Temp.(C), Inputs PNP?(=1 if input stage uses pnps), Debug?(=1 print debug information during extraction)

Output:

None

Extracts:

NPN1.BF, NPN1.IS, NPN2.BF, NPN2.IS, C1, RC1, RC2, RE1, RE2, RE, CE, RP, GCM, GA, R2, C2, GB, RO2, RC, RO1, DMOD1.IS, DMOD2.IS, VC, VE, IEE

Automatic Invocation:

By Extract menu function