Patent ID: 6351502
Filing Date: 2002-02-26
Classification: H03D,H04B

Abstract:
A radio-frequency (RF) front-end comprising:a low noise amplifier (LNA) to amplify a received signal at a carrier frequency, the LNA having inductive loads; a first mixer, coupled to the low noise amplifier, to mix an amplified received signal with a first local oscillator (LO) signal to down convert the amplified received signal to an intermediate frequency (IF), the first mixer having inductive loads, wherein the IF is related to the carrier frequency such that an image channel associated with the carrier and the frequency of the LO signal is outside the bandwidth of the inductive loads of the LNA; an I/Q quadrature mixer stage having a second mixer and a third mixer coupled to the first mixer, the I/Q quadrature mixer converting the amplified received signal at the IF to I and Q signals using a second LO signal related to the first LO signal.