Patent ID: 6259902
Filing Date: 2001-07-10
Classification: H04B

Abstract:
A dual channel receiver, comprising:a front end bandpass filter that has a front end bandwidth, that splits a received signal into a first signal and a second signal of essentially equal signal strengths, and that provides out of band isolation between first and second signal outputs at which the first and second signals are provided;a first mixer coupled to the first signal and coupled to a high side injection signal having an injection frequency, INJ1, outside the front end bandwidth, the first mixer generating a first mixer output signal substantially at an intermediate frequency (IF);second mixer coupled to the second signal and counled to a low side injection signal having an injection frequency, INJ2, outside the front end bandwidth, the second mixer generating a second mixer output signal substantially at the IF;a first second stage mixer having a high side second stage injection signal that generates a first second stage mixer output signal at a second intermediate frequency; anda second second stage mixer having a low side second stage injection signal that generates a second mixer output signal at the second intermediate frequency.