QEDesign濾波器設計 

QEDesign
Lite

QEDesign
1000

QEDesign
2000


QEDesign
是一個非常好用的濾波器設計軟體，QEDesign的產品系列可分為QEDesign
Lite、QEDesign1000和QEDesign2000這三種產品都可以解決在設計FIR或IIR濾波器上所遇到的問題。 

以下表格是說明不同版本的QEDesign所包含的特殊函數： 

Supported
Platforms

Platform

QEDesign
family member

QEDesign
Lite
student version

QEDesign
1000
professional

QEDesign
2000
Premier

Win95/NT

Yes

Yes

Yes

UNIX

No

No

Yes



Supported
Filter Types

Type
of Filter

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

Lowpass

Yes

Yes

Yes

Highpass

Yes

Yes

Yes

Bandpass

Yes

Yes

Yes

Bandstop

Yes

Yes

Yes

Differentiator

No

Yes

Yes

Multiband

No

Yes

Yes

Hilbert
Transformer

No

Yes

Yes

Arbitrary
Magnitude (FIR)

No

Yes

Yes

Halfband

No

Yes

Yes

Raised
Cosine

No

Yes

Yes

Root
Raised Cosine

No

Yes

Yes

Arbitrary
Group Delay

No

Yes

Yes



Maximum
Filter Order

Type
of Filter

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

IIR

12th
order

80th
order

200th
order

FIR
with windows

128

2048

100,000

Equiripple
FIR

64

1024

50,000

Equiripple
limit is the same as FIR for all


IIR
Analog Prototypes

Type
of Filter

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

Butterworth

Yes

Yes

Yes

Tschebyscheff

Yes

Yes

Yes

Inverse
Tschebyscheff

Yes

Yes

Yes

Elliptic

Yes

Yes

Yes

Bessel

Yes

Yes

Yes



Digital
Transformation Methods

Method

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

Bilinear

Yes

Yes

Yes

Impulse
Invariant

No

Yes

Yes

Matched
ZTransform

No

No

Yes



IIR
Realization Methods for bilinear and matched
ztransform designs

Method

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

Cascade

Yes

Yes

Yes

Parallel

No

No

Yes

Ratio
of polynomials

No

No

Yes



FIR
Window Functions

Window
Function

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

Rectangular

Yes

Yes

Yes

Triangular

Yes

Yes

Yes

Hanning

Yes

Yes

Yes

Hamming

Yes

Yes

Yes

Blackman

Yes

Yes

Yes

Kaiser

Yes

Yes

Yes

Exact
Blackman

No

Yes

Yes

3
Term Cosine

No

Yes

Yes

3
Term Cosine with continuous 3rd Derivative

No

Yes

Yes

Minimum
3 Term Cosine

No

Yes

Yes

4
Term Cosine

No

Yes

Yes

4
Term Cosine with continuous 5th Derivative

No

Yes

Yes

Minimum
4 Term Cosine

No

Yes

Yes

Good
4 Term Blackman Harris

No

Yes

Yes

Harris
Flat Top

No

Yes

Yes

DolphTschebyscheff

No

Yes

Yes

Taylor

No

Yes

Yes

Gaussian

No

Yes

Yes



System
Analysis

Domain
Type

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEesign
2000

ZDomain
transfer function

No

Yes

Yes

SDomain
transfer function

No

Yes

Yes



Compensation
Features

Features

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

D
to A conversion

No

Yes

Yes

Comb
Filter Compensation

No

Yes

Yes

Phase
Equalization

No

Yes

Yes



Plot
Options

Plot
Type

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

Magnitude

Yes

Yes

Yes

Log
Magnitude

Yes

Yes

Yes

Poles
and Zeros

Yes

Yes

Yes

Phase

Yes

Yes

Yes

Group
Delay

Yes

Yes

Yes

Impulse
Response

Yes

Yes

Yes

Step
Response

No

Yes

Yes

Logarithmic
Frequency Scale

No

Yes

Yes



Miscellaneous

Features

QEDesign
family member

QEDesign
Lite

QEDesign
1000

QEDesign
2000

Graphical
Placement of Poles and Zeros with simultaneous display
of system response

No

No

Yes

Quad
Precision Calculations for critical designs

No

No

Yes



