Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1997-11-21
1999-11-23
Lee, Benny
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330284, H03F 316
Patent
active
059907444
ABSTRACT:
In an amplifier stage a first FET receives the input signal at its gate electrode. The drain of the first FET is connected to the drain of a second FET, and both drains are connected to the same drain voltage supply. The amplifier stage output is from the drain of the second FET. A third FET has its drain connected to the drain voltage supply and its source connected to the reference voltage supply. The physical characteristics of the third transistor are selected to produce a voltage of a fixed value that is applied as a bias to the source of the second transistor to compensate for an offset of the amplifier stage input signal voltage. A fourth FET has its drain connected to the drain voltage supply and its source connected to the drain of the third FET. The drain of the fourth FET is connected to the gate of the second FET. The physical characteristics of the fourth FET and the current flowing through it determine the gain of the amplifier stage. The third and fourth FETs are not in the signal path. Several stages can be connected in cascade with only one pair of said third and fourth transistors connected to the source and gate of the second transistor of each stage.
REFERENCES:
patent: 3764931 (1973-10-01), Waku et al.
patent: 3803505 (1974-04-01), Ishigaki et al.
patent: 3913026 (1975-10-01), Koehler
Lee Benny
Lucent Technologies - Inc.
Nguyen Khanh Van
LandOfFree
Wide band process independent gain controllable amplifier stage does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide band process independent gain controllable amplifier stage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide band process independent gain controllable amplifier stage will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1226201