FREQUENCY MIXER

摘要

PURPOSE: A frequency mixer is provided to improve noise figure, by increasing conversion gain frequency bandwidth. CONSTITUTION: A transconductance stage(110) outputs a current corresponding to a voltage of an RF signal. A switching stage(120) switches the current outputted from the transconductance stage in response to a local oscillator signal. A load terminal(140) is connected between the switching stage and a power source port. A current bleeding stage(130) is connected between the switching stage and power source port. The current bleeding stage has one resonance inductor to remove noise generated from a bleeding current source. A bias stage(150) has one or more current source for stable current flow on the transconductance stage.