Patent ID: 9014653
Filing Date: 2015-04-21
Classification: H03B,H03L,H04B

Abstract:
1. A superheterodyne radio frequency (RF) receiver, comprising: an RF input node for receiving an RF input signal; a local oscillator (LO) input node for receiving an LO signal; a mixer coupled to said RF input node and said LO input node, said mixer operative to frequency translate said RF input signal in accordance with said LO signal, said mixer producing an in-phase/quadrature (I/Q) intermediate frequency (IF) signal of frequency substantially higher than a bandwidth of said RF input signal; a band pass discrete-time (DT) IF filter coupled to said IF signal, wherein said band pass DT IF filter presents an input impedance that is substantially higher at higher frequency offsets from said IF frequency than at lower frequency offsets from said IF frequency.