FREQUENCY MIXER USING NEW DYNAMIC DURRENT BLEEDING TECHNIQUE

摘要

Disclosed is a frequency mixer for increasing a conversion gain while removing flicker noise. The frequency mixer comprises: an input unit for receiving an RF signal; a switching unit for receiving an LO+ signal, an LO- signal and the RF signal to generate a frequency signal; an output unit for outputting the frequency signal generated by the switching unit; and a current bleeding unit having two transistors to perform a current bleeding function. Among the transistors, a first transistor is connected to a first output terminal among output terminals of the output unit, and a second transistor among the transistors is connected to a second output terminal among the output terminals, wherein the LO+ signal and the LO- signal have a 180° phase difference. In addition, one of the first transistor and the second transistor is turned on while the other is turned off in a period except for a time when the LO+ signal and the LO- signal cross each other, and the first transistor and the second transistor are all turned on at a time when the LO+ signal and the LO- signal cross each other.