Patent ID: 6112065
Filing Date: 2000-08-29
Classification: H04B

Abstract:
A receiver comprising:an intermediate frequency (IF) input signal operating at a first frequency;a local oscillator signal, derived from a synthesizer of a receiver, and operating at a second frequency;a frequency mixer for mixing the input signal and the local oscillator signal to produce a first mixed signal operating at a third frequency;a high dynamic range active filter for filtering out interference and wideband noise from the first mixed signal;a limiter for limiting the filtered signal from said filter and outputting a first limiter signal;a digital mixer for mixing said first limiter signal with a divided signal, from a synthesizer of a receiver, operating at a fourth frequency to produce a second mixed signal operating at a fifth frequency;a low dynamic range active filter for filtering out unwanted portions of the second mixed signal and producing a second filtered signal; anda second limiter for removing amplitude noise from the second filtered signal and outputting a second limiter signal, operating at a frequency higher than the frequency of the input signal, for processing by a post-IF component.