Patent ID: 7199844

Claim:
A television demodulator circuit comprising: I, Q demodulator for receiving a television signal and for mixing the television signal with an in-phase (“I”) local oscillator signal and a quadrature phase (“Q”) local oscillator signal at a tuned television channel to generate a baseband I signal and a baseband Q signal; low pass filter, coupled to the I, Q demodulator, for filtering the baseband I signal and baseband Q signal; and Nyquist slope filter for receiving the baseband I signal and baseband Q signal and for generating a video signal by generating a Nyquist slope response and by attenuating channels adjacent to the tuned television channel, wherein the Nyquist slope filter comprises a transfer function with at least two zero crossings, so as to provide a notch filter response for attenuation of a television channel adjacent to the tuned television channel.