Broad-band amplifier

Details Broad-band amplifier Broad-band amplifier

1993-07-30

1994-09-06

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330 85, 330290, 330300, H03F 130, H03F 316

Patent

active

053451910

ABSTRACT:
Voltage control means output to a variable resistance part 2 a control voltage proportionate to an error between an input detection signal of an input terminal T.sub.i of a source follower field-effect transistor 1 and an output detection signal of an output-side transistor 5. Although said variable resistance part 2 changes its resistance value in accordance with a control voltage, a drain current flowing from the field-effect transistor to said variable resistance part is maintained constant by a constant-current source 3. Thus, an output voltage of the output side transistor changes in accordance with said error, thereby controlling the input detection voltage and the output detection voltage to be constantly the same.

REFERENCES:
patent: 4495471 (1985-01-01), Barrett

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