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(Obsolete) Volterra PN Junction Capacitance: VCJCN



Name Description Unit Type Default
ID Element ID Text VC1
*CJ0 Zero-voltage junction capacitance Capacitance 1 pF
*VJ Built-In voltage Voltage 1 V
*VDD Junction DC bias voltage Voltage 0 V
*M Denominator exponent   0.5
AFAC Junction area scaling factor   1

* indicates a secondary parameter

Implementation Details

VCJCN is a nonlinear PN junction depletion capacitance described by a Taylor series expansion in the vicinity of its DC bias voltage, VDD. Its charge-voltage characteristic is give by

where qn are the coefficients of a Taylor-series expansion of the junction charge function

The current in the capacitor is simply

where i is the current in the controlled source and v is the control voltage. Since the qn are evaluated at a particular DC bias voltage, DC bias is implicit in the model. Thus, DC bias must not be included in the circuit.


This element does not have an assigned layout cell. You can assign artwork cells to any element. See “Assigning Artwork Cells to Layout of Schematic Elements” for details.

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