d2c_apden

Discrete-to-continuous transformation for all-pass filters

D2C_APDEN discrete-to-continuous transformation for all-pass filters only. Allows symbolic coefficients.

USAGE

As = d2c_apden(A)

As = d2c_apden(A,w)

INPUTS

A: Digital AP filter denominator coefficient vector.

Coefficient vector A can be numerical or symbolic.

Assuming A(1) is unity. Please scale if not(A(1)==1).

w: Optional for Tustin's prewarp.

OUTPUTS

As: Analog AP filter denominator coefficient vector.

Bs: Analog AP filter numerator coefficient vector.