CIRCUIT FOR AMPLIFICATION DEGREE AND NOISES DEGREE IMPROVING MOSFET AND FREQUENCY MIXER, AMPLIFIER AND OSCILLATOR USING THEREOF

摘要

A circuit for improving amplification and noise of a MOSFET(MOS field effect transistor) and a frequency mixer, an amplifier and an oscillator using the same are provided to improve amplification and a noise characteristic by using the body effect of the MOSFET. A circuit for improving amplification and noise of a MOSFET includes a capacitor, and a current source. The capacitor connects a gate terminal and a body terminal of the MOSFET. The current source is connected with the gate terminal and the body terminal of the MOSFET to improve the amplification and the noise of the MOSFET so as to supply signals simultaneously. The MOSFET is a P-type MOSFET or an N-type MOSFET.