Patent ID: 8145143
Filing Date: 2012-03-27
Classification: H03D

Abstract:
1. A bidirectional frequency converter comprising: a bipolar transistor; a load impedance element connected to a collector terminal of the bipolar transistor; a first variable voltage source for supplying power to the collector terminal of the bipolar transistor through the load impedance element; a bias part connected to a base terminal of the bipolar transistor to supply a bias; a second variable voltage source for supplying power to the bias part; and an emitter impedance element connected to an emitter terminal of the bipolar transistor, wherein when a local oscillation signal is input to a third signal terminal connected to the emitter terminal, the first variable voltage source supplies a first voltage to the collector terminal, and the second variable voltage source supplies a second voltage to the base terminal, an output signal of a second frequency, which is obtained by mixing an input signal of a first frequency input from a first signal terminal connected to the base terminal and the local oscillation signal, is output from a second signal terminal connected to the collector terminal, and wherein when the local oscillation signal is input to the third signal terminal, the first variable voltage source supplies a third voltage to the collector terminal, and the second variable voltage source supplies a fourth voltage to the base terminal, an output signal of the first frequency, which is obtained by mixing an input signal of the second frequency input from the second signal terminal and the local oscillation signal, is output from the first signal terminal.