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Chip Capacitor (Closed Form): CHIPCAP

Symbol

Equivalent Circuit

Parameters

Name Description Unit Type Default
ID Name Text C1
C Capacitance Capacitance 1 pF
Q Q   0
FQ Frequency at which Q is evaluated Frequency 0 GHz
FR Series-resonant frequency Frequency 0 GHz
ALPH Exponent for scaling Q   1
DCMod DC modeling Vector text (pull-down) Lossless

Parameter Details

DCMod. Specifies the DC behavior of the model. Lossless indicates that the model is an ideal capacitor at DC. Lossy indicates that loss is taken into account at DC.

Parameter Notes

Entering zero (or leaving the default value) for FQ or Q makes the loss resistance infinite.

Entering zero for FR or C makes the series inductance zero.

Implementation Details

Implements a chip capacitor with frequency-dependent Q.

The impedance of the capacitor is given by:

Layout

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.

Restrictions

  1. C, Q, FR, and FQ must be greater than or equal to zero.

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