Patent ID: 8018267

Claim:
A frequency conversion mixer, comprising: a transconductance stage configured to receive a Radio Frequency (RF) signal, and to output a current corresponding to a voltage of the RF signal; a switching stage configured to switch the current outputted from the transconductance stage in response to a local oscillation signal, thereby mixing the RF signal and the local oscillation signal to output an intermediate frequency (IF) signal; a load stage connected between the switching stage and a supply voltage terminal; a current bleeding circuit connected in parallel with the switching stage to get a current bleeding effect and a current reuse effect; a resonant inductor configured to reduce noise that is generated in parasitic capacitance at a node between the transconductance stage and the switching stage; and a bias stage connected between the transconductance stage and a ground terminal and having at least one current source for allowing a stable current to flow in the transconductance stage, wherein the bias stage is activated for a switched biasing in response to the intermediate frequency signal.