Patent ID: 6400416
Filing Date: 2002-06-04
Classification: H03D,H04N

Abstract:
A receiver for use with an input signal that takes the form of at least one of a broadcast television signal, a cable television signal, and a digital signal transmitted over a cable delivery system, comprising:a first mixer including a first input adapted for receiving an input signal in a predetermined frequency range, the first mixer further including a second input adapted for receiving a first reference signal having a first operating frequency, the first mixer suitable for outputting at an output thereof an intermediate frequency signal having a frequency greater than at least one frequency in the predetermined frequency range; a filter for filtering the intermediate frequency signal; a phase shifting network including an input adapted for receiving a second reference signal having a second operating frequency, the phase shifting network further including a pair of outputs, the phase shifting network suitable for outputting at the outputs thereof a pair of quadrature reference signals each having a frequency substantially equal to the second operating frequency; a pair of second mixers each having a first input coupled to the filter and a second input coupled to one of the outputs of the phase shifting network, the second mixers suitable for outputting at outputs thereof output signals that are in quadrature and at a baseband frequency; and a pair of low-pass filters coupled to the second mixers for filtering the output signals.