zpk
Convert digital filter to zero-pole-gain representation
Syntax
Description
Examples
Highpass Filter in Zero-Pole-Gain Form
Design a highpass FIR filter of order 8 with passband frequency 75 kHz and passband ripple 0.2 dB. Specify a sample rate of 200 kHz. Find the zeros, poles, and gain of the filter.
hpFilt = designfilt('highpassiir','FilterOrder',8, ... 'PassbandFrequency',75e3,'PassbandRipple',0.2, ... 'SampleRate',200e3); [z,p,k] = zpk(hpFilt)
z = 8×1
1
1
1
1
1
1
1
1
p = 8×1 complex
-0.6707 + 0.6896i
-0.6707 - 0.6896i
-0.6873 + 0.5670i
-0.6873 - 0.5670i
-0.7399 + 0.3792i
-0.7399 - 0.3792i
-0.7839 + 0.1344i
-0.7839 - 0.1344i
k = 1.2797e-05
Input Arguments
d
— Digital filter
digitalFilter
object
Digital filter, specified as a digitalFilter
object. Use designfilt
to generate a digital filter
based on frequency-response specifications.
Example: d =
designfilt('lowpassiir','FilterOrder',3,'HalfPowerFrequency',0.5)
specifies a third-order Butterworth filter with normalized 3 dB frequency 0.5π
rad/sample.
Output Arguments
z
— Zeros
column vector
Zeros of the filter, returned as a column vector.
Data Types: double
p
— Poles
column vector
Poles of the filter, returned as a column vector.
Data Types: double
k
— Gain
real scalar
Gain of the filter, returned as a real scalar.
Data Types: double
Version History
Introduced in R2014a
See Also
designfilt
| digitalFilter
| ss
| tf
Apri esempio
Si dispone di una versione modificata di questo esempio. Desideri aprire questo esempio con le tue modifiche?
Comando MATLAB
Hai fatto clic su un collegamento che corrisponde a questo comando MATLAB:
Esegui il comando inserendolo nella finestra di comando MATLAB. I browser web non supportano i comandi MATLAB.
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
How to Get Best Site Performance
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)