Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1993-06-03
1994-08-16
Sikes, William L.
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330279, 330289, 330280, 330281, H03G 330, H03F 130, H04B 1700, H04B 104
Patent
active
053390466
ABSTRACT:
An amplifier for a radio transceiver overcomes the problem of gain being dependent on ambient temperature. Transmission power is matched to strength of a received signal by providing matched dual gate FET amplifier stages in both the transmitter and receiver portions of the transceiver. Changes in gain due to temperature are compensated for by detecting changes in the FET drain current by measuring the source voltage of the amplifier. The FET source voltage is compared to a reference voltage, and the output signal resulting from the comparison is provided as a control signal to one of the FET gates.
REFERENCES:
patent: 3514710 (1970-05-01), Janning, Jr.
patent: 4041396 (1977-08-01), Fedde
patent: 4158180 (1979-06-01), Challen
patent: 4320350 (1982-03-01), Drapac
patent: 4447783 (1984-05-01), Quick
patent: 4495648 (1985-01-01), Giger
patent: 4510460 (1985-04-01), Tamura
patent: 4523155 (1985-06-01), Walczak et al.
patent: 4578603 (1986-03-01), McPherson
patent: 4593409 (1986-06-01), Miller
patent: 4602218 (1986-07-01), Vilmur et al.
patent: 4613990 (1986-09-01), Halpern
patent: 4654882 (1987-03-01), Ikeda
patent: 4709403 (1987-11-01), Kikuchi
patent: 4723304 (1988-02-01), Maeda
patent: 4870698 (1989-09-01), Katsuyama et al.
patent: 5029298 (1991-07-01), Chiba et al.
patent: 5107225 (1992-04-01), Wheatley et al.
patent: 5132634 (1992-07-01), Suarez
patent: 5146180 (1992-09-01), Hyakutake
Textbook Microelectronics Circuits, 2nd Edition; A. S. Sedra, K. C. Smith; HRW, Inc., New York N.Y. 1987.
Kornfeld Richard K.
Okazaki Mitsunari
Weiland Ana L.
Abraham Fetsum
Alps Electric Co. ,Ltd.
Bever Patrick T.
Klivans Norman R.
Qualcomm Inc.
LandOfFree
Temperature compensated variable gain amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature compensated variable gain amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature compensated variable gain amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-955237