Patent ID: 6631257
Filing Date: 2003-10-07
Classification: H03D

Abstract:
A mixer circuit comprising:a first pair of local oscillator (LO) transistor devices each having an input connected to a first LO input terminal for receiving LO signals; a second pair of LO transistor devices each having an input connected to a second LO input terminal for receiving LO signals; a first radio frequency (RF) transistor device: having an input connected to a first RF input terminal for receiving RF signals; and connected in anti-series to a first one of said first pair of LO transistor devices and a first one of said second pair of LO transistor devices; a second RF transistor device having an input connected to a second RF input terminal for receiving RF signals; and connected in anti-series to a second one of said first pair of LO transistor devices and a second one of said second pair of LO transistor devices; a fist intermediate frequency (IF) output terminal connected to an output of said first one of said first pair of LO transistor devices and an output of said second one of said second pair of LO transistor devices, said first IF output terminal for outputting IF signals; and a second IF output terminal connected to an output of said first one of said second pair of LO transistor devices and an output of said second one of said first pair of LO transistor devices, said second IF output terminal for outputting IF signals.