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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Lumped >
   Capacitor (CAP)       

Capacitor (CAP)

 

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Properties

Description

Unit

Default

Range

C

Capacitance

Farad

Required

 

Q

Quality factor

none

¥

 

EXP

Exponential factor.

None

0.

³ 0

F

Reference frequency for Q

Hz

0.0

³ 0

TEMP

Local temperature

deg Cel

25

> –273.15

 

Notes

1. The model is described by the following:

 where w=2pf, and f is the operating frequency.

2. If Q is not specified, then the capacitor is assumed ideal, i.e., Gd=0.

3. The exponential factor, EXP, acts on Q according to the following equation:

 where fref is the reference frequency for Q. So, when EXP=0, Q=constant, and when EXP=1, the conductance Gd in the equivalent circuit is constant.

Netlist Form

CAP:NAME n1 [n2] C=val [Q=val F=val] [EXP=val] [TEMP=val]

Netlist Example

CAP:CAP1 1 C=5PF

Constant Q, Gdµf:

CAP:CAP2 1 2 C=5PF Q=75 F=2GHZ

Qµf, constant Gd:

CAP:CAP3 1 C=5PF Q=75 F=2GHZ EXP=1

Q(f)=Q(fQ)(fQ/f)EXP:

CAP:CAP4 1 2 C=1PF Q=200 F=1GHZ EXP=1.6

References

 



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