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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Demodulators >
   Complex Multiplier (CMULT)       

Complex Multiplier (CMULT)

 

 


Property

Description

Units

Default

Range/Type

TYPE

Type of multiplier:
1: High side multiplier
2: Low side multiplier

None

1

[1, 2]/Integer

RIN1

Input1 impedance

Ohm

Inf

(0, Inf]/Real

RIN2

Input2 impedance

Ohm

Inf

(0, Inf]/Real

ROUT

Output impedance

Ohm

0

[0, Inf)/Real

Ports

Input1

Input1 signal (complex)

Input2

Input2 signal (complex)

Output

Output signal (complex)

 

Notes

1. This model performs complex multiplication. If both inputs to this model are baseband signals vin,1(t) and vin,2(t), the output is baseband signal. The output quad-phase is 0, and in-phase sig­nal is given as follows
vout,i(t) = vin,1,i(t) · vin,2,i(t)

If both the inputs to this model are bandpass signals with the in-phase and quad-phase enve­lopes vin,1,i(t), vin,1,q(t) and vin,2,i(t), vin,2,q(t), the output is bandpass signal and has the differ­ent output carrier frequency. The output carrier frequency, in-phase and quad-phase envelopes are given as follows, respectively

1. TYPE = 1 for high side multiplier

    fout = fin,1 + fin,2

    vout,i(t) = vin,1,i(t) · vin,2,i(t) - vin,1,q(t) · vin,2,q(t)

    vout,q(t) = vin,1,i(t) · vin,2,q(t) + vin,1,q(t) · vin,2,i(t)

2. TYPE = 2 for low side multiplier

    if fin,1 > fin,2

       fout = fin,1 - fin,2

       vout,i(t) = vin,1,i(t) · vin,2,i(t) + vin,1,q(t) · vin,2,q(t)

       vout,q(t) = -vin,1,i(t) · vin,2,q(t) + vin,1,q(t) · vin,2,i(t)

    if fin,1 = fin,2

       fout = 0

       vout,i(t) = vin,1,i(t) · vin,2,i(t) - vin,1,q(t) · vin,2,q(t)

       vout,q(t) = 0

    if fin,1 < fin,2

       fout = fin,2 - fin,1

       vout,i(t) = vin,1,i(t) · vin,2,i(t) + vin,1,q(t) · vin,2,q(t)

       vout,q(t) = vin,1,i(t) · vin,2,q(t) - vin,1,q(t) · vin,2,i(t)

Netlist Form

CMULT:Name n1 n2 n3 [TYPE=val] [Rin1=Val] [Rin2=Val] [Rout=Val]

Netlist Example

CMULT:1 1 2 3 TYPE=2



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