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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Filters >
   Polynomial Low Pass Filter (POLYLPF)       

Polynomial Low Pass Filter (POLYLPF)

 

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Properties

Description

Units

Default

Range

N

N0, N1, N2,...:Coefficients of the polynomial in the numerator

None

0

-INF, INF

D

D0, D1, D2,...: Coefficients of the polynomial in the denominator

None

0

-INF, INF

FC

3-dB cutoff frequency

Hz

Required

> 0

GF

Gain factor

None

1

-INF, INF

R1

Resistive part of reference impedance at port 1

Ohm

50.

>0

X1

Reactive part of reference impedance at port 1

Ohm

0.

-INF,INF

R2

Resistive part of reference impedance at port 2

Ohm

50.

>0

X2

Reactive part of reference impedance at port 2

Ohm

0.

-INF, INF

 

 

Notes

1. The transfer function is:



where:



and F is the analysis frequency.

2. At least one coefficient in the numerator and one coefficient in the denominator must be sup­plied.

Netlist Form

POLYLPF:NAME n1 n2 N0=val N1=val...

+ D0=val D1=val ... FC=val

+ [GF=val] [R1=val] [X1=val] [R2=val] [X2=VAL]

Netlist Example

POLYLPF:1 1 2 D0=0.27563 D1=0.74262 D2=1.45392

+ D3=0.95281 D4=1 N0=0.05513 FC=15.915kHz GF=4



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