sdr.IIR.impulse_response(N: int = 100) → NDArray Returns the impulse response h[n] of the IIR filter. The impulse response h[n] is the filter output when the input is an impulse δ[n]. Parameters:¶ N: int = 100¶The number of samples to return. Returns:¶ The impulse response of the IIR filter h[n]. See also sdr.plot.impulse_response Examples¶ See the IIR filters example.