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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Fixed-Point >
   Complex to Fixed-Point Converter (CTOFXT)       

Complex to Fixed-Point Converter (CTOFXT)

 

 


Property

Description

Units

Default

Range/type

outW

Word length of the output fixed point number

None

32

[1, 32]/Integer

outD

Precision of the output fixed point number

None

0

[0, 32]/Integer

ovf

Overflow characteristic:

0 for wrapped,

1 for saturate,

2 for zero saturate

None

0

[0, 2]/Integer

IorQ

In-phase or quadrature component:

0 for in-phase,

1 for quadrature

None

0

[0, 1]/Integer

quant

Quantization characteristic:

0 for truncated,

1 for rounded,

2 for truncated 0

None

0

[0, 2]/Integer

ArithType

Arithmetic type: 0 for signed, 1 for unsigned

None

0

[0 ,1]/Integer

Rin

Input impedance

Ohm

Inf

(0, Inf]/Real

Rout

Output impedance

Ohm

0

[0, Inf)/Real

Ports

Input

Input signal (floating point complex number)

Output

Output signal (fixed point real number)

 

Limits

outW > outD for signed arithmetic

Notes

This model converts the complex floating point signal to a real fixed-point signal. If IorQ is set to 0, the output is from the real part of the input signal (in-phase component); else, if IorQ is equal to 1, the output is from the imaginary part of the input signal (quadrature component). The format of the output signal is set by the parameters: outW, outD, ovf, quant, arithtype, where ovf defines the overflow characteristics, quant defines the quantization characteristics and arithtype defines the arithmetic type. The following plot shows the relationship between the word length and the pre­cision.

 

Netlist Form

CTOFXT:NAME n1 n2 [outW=val] [outD=val] [ovf=val] [quant=val] [IorQ=val] [arithtype=val] [Rin=val] [Rout=val]

Example

CTOFXT:1 1 2 outW=16 outD=4 ovf=1 quant=1 IorQ=1



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