#### cplusruss

##### Newbie

New here. I'm trying to compute the inverse of a filter in the Z domain. Given the system transfer function H(z) = N(z)/D(z), I wish to find an inverse filter transfer function. If I put a sine wave into the forward filter H(z) and then put the output into the inverse filter, I should get the input signal back. The way I understand this is that the inverse filter transfer function is literally 1/H(z) = G(z), where G(z) is the inverse filter. I seem to be getting a large impulse for 10 ns or so and then a very, very small output. Any ideas? Anyone ever computed an inverse filter?

Regards