Name

cheb1mag — response of Chebyshev type 1 filter

Calling Sequence

[h2]=cheb1mag(n,omegac,epsilon,sample)

Parameters

n

integer : filter order

omegac

real : cut-off frequency

epsilon

real : ripple in pass band

sample

vector of frequencies where cheb1mag is evaluated

h2

Chebyshev I filter values at sample points

Description

Square magnitude response of a type 1 Chebyshev filter.

omegac=passband edge.

epsilonsuch that 1/(1+epsilon^2)=passband ripple.

samplevector of frequencies where the square magnitude is desired.

Examples

 
//Chebyshev; ripple in the passband
n=13;epsilon=0.2;omegac=3;sample=0:0.05:10;
h=cheb1mag(n,omegac,epsilon,sample);
plot2d(sample,h)
xtitle('','frequencies','magnitude')

See Also

buttmag