Patent ID: 6239645
Filing Date: 2001-05-29
Classification: H03D

Abstract:
A complementary mixer circuit comprising:a first series circuit having a first pair of differentially arranged transistors receiving a first multiply signal in differential form, and an impedance circuit which operates as a constant current source,a second series circuit of similar configuration to said first series circuit,a differential amplifier receiving a second multiply signal and providing a pair of outputs in differential form,said first series circuit and said second series circuit being inserted between a first power terminal and a second power terminal respectively through a respective load resistor,said differential amplifier being supplied directly by said first power terminal, and each output in differential form is coupled with a junction of transistors and the impedance circuit in said first series circuit and a junction of transistors and the impedance circuit in said second series circuit, respectively,a product, in differential form, of said first multiply signal and said second multiply signal being obtained at a junction of said load resistors and said series circuits.