Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1976-08-09
1978-06-20
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330288, 330293, 330296, 331108B, 331116R, H03F 316, H03B 536, H03B 520
Patent
active
040964442
ABSTRACT:
An active circuit is disclosed including an integrated circuit having at least one amplification stage comprising an FET. At least one negative feedback transistor is provided of the same conduction type as the amplifying transistor, with the drain-to-source path of the negative feedback transistor coupled in series between the drain and gate of the amplifying transistor. At least one biasing transistor of the same conduction type as the amplifying transistor are provided to bias the gate of the negative feedback transistor. The drain of the at least one biasing transistor is connected to a current source furnishing a current having a given ratio to the power supply current of the amplifying transistor. This circuit permits precise control of the small-signal resistance of the feedback transistor.
REFERENCES:
patent: 3700981 (1972-10-01), Masuhara et al.
patent: 3868597 (1975-02-01), Gollinger
patent: 3889211 (1975-06-01), Morozumi
Centre Electronique Horloger S.A.
Mullins James B.
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