Function File: [z, p, g] = cheb1ap (n, Rp) ¶

Design lowpass analog Chebyshev type I filter.

This function exists for MATLAB compatibility only, and is equivalent to cheby1 (n, Rp, 1, "s").

Input:

• N Order of the filter must be a positive integer
• RP Ripple in the passband in dB

Output:

• z The zero vector
• p The pole vectorAngle
• g The gain factor

Example

[z, p, g] = cheb1ap (2, 1)
z = [](0x1)
p =

 -0.54887 - 0.89513i
 -0.54887 + 0.89513i

g =  0.98261

See also: buttap, cheby1, cheb2ap, ellipap.

Package: signal