Patent ID: 8384586

Claim:
Mixer circuit, comprising: an oscillator signal; an oscillator input port; said oscillator input port (LO) in communication with said oscillator signal; a radio frequency signal; a radio frequency input port (RF) in communication with said radio frequency signal; two mixer branches ( 12 a , 12 b ), each mixer branch ( 12 a , 12 b ) includes a rectifier circuit having a diode, a load resistor ( 22 a , 22 b ), a decoupling capacitor ( 24 a , 24 b ), a series resistor ( 14 a , 14 b ) and a series capacitance ( 16 a , 16 b ); said mixer branches ( 12 a , 12 b ) are respectively connected to said oscillator input port (LO) and to said radio frequency input port (RF), said two mixer branches produce intermediate signals (IF 1 , IF 2 ); said intermediate signals (IF 1 , IF 2 ) correspond to a Doppler shift between said oscillator signal and said radio frequency signal; and, an output port outputting an overall output intermediate signal.