Circuit for improving amplification and noise...

Details Circuit for improving amplification and noise... Circuit for improving amplification and noise...

2007-01-10

2008-09-02

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including field effect transistor

C330S307000

Reexamination Certificate

active

07420418

ABSTRACT:
A circuit for improving amplification and noise characteristics of a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and a frequency mixer, an amplifier and an oscillator using the circuit are provided. A gate terminal of the MOSFET is connected to a body terminal of the MOSFET through a capacitor and the gate and body terminals of the MOSFET are connected to a current source to simultaneously provide a signal to both the gate terminal and the body terminal, in order to improve amplification and noise characteristics of the MOSFET. As a result, a higher level of amplification and a lower level of noise than the conventional art can be obtained.

REFERENCES:
patent: 3390314 (1968-06-01), Medwin
patent: 3436621 (1969-04-01), Crawford
patent: 5192920 (1993-03-01), Nelson et al.
patent: 6127892 (2000-10-01), Komurasaki et al.
patent: 6642795 (2003-11-01), Koen et al.

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