Patent ID: 7236763
Filing Date: 2007-06-26
Classification: H03D

Abstract:
1. A mixer circuit, comprising: a first quad ring differential switching mixer with differential radio frequency inputs, differential local oscillator inputs, and differential intermediate frequency outputs; a second quad ring differential switching mixer with differential radio frequency inputs, differential local oscillator inputs, and differential intermediate frequency outputs; a third quad ring differential switching mixer with differential radio frequency inputs, differential local oscillator inputs, and differential intermediate frequency outputs; wherein an overall input signal to the mixer circuit is fed to an input port of the first quad ring differential switching mixer, an output of the first quad ring differential switching mixer is fed to an input port of the second quad ring differential switching mixer, the output of the second quad ring differential switching mixer is fed to an input port of the third quad ring differential switching mixer, and an overall output of the mixer circuit is an output of the third quad ring differential switching mixer.