Semiconductor amplifying circuit having improved bias circuit fo

Details Semiconductor amplifying circuit having improved bias circuit fo Semiconductor amplifying circuit having improved bias circuit fo

1996-10-15

1998-09-15

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330296, H03F 316

Patent

active

058085157

ABSTRACT:
A semiconductor amplifying circuit of the present invention comprises: an amplifying field effect transistor device having a gate supplied with an input signal and a drain for outputting an amplified output signal; and a bias circuit for supplying a bias voltage to said gate of said amplifying transistor device. The bias circuit includes: a first bias voltage generator having a first dummy field effect transistor device formed on a same substrate as said amplifying transistor device is formed, and a voltage feedback bias circuit for supplying a bias voltage to a gate of said first dummy transistor device; and a second bias voltage generator for supplying a lower potential to said voltage feedback bias circuit when a drain current of said field effect transistor device increases, and supplying a higher potential to said voltage feedback bias circuit when said drain current decreases. A gate voltage of said first dummy transistor device is supplied as a bias voltage to said gate of said amplifying transistor device. The power supply can be applied directly to the drain of the amplifying transistor so as to maximizing the transistor performance.

REFERENCES:
patent: 4912430 (1990-03-01), Frank
patent: 4990973 (1991-02-01), Ishikawa et al.
patent: 5337019 (1994-08-01), Musiol
patent: 5675290 (1997-10-01), Tsukahara et al.

Affiliated with

Also associated with

Rating

Semiconductor amplifying circuit having improved bias circuit fo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor amplifying circuit having improved bias circuit fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor amplifying circuit having improved bias circuit fo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-92347