Variable gain amplifier

Details Variable gain amplifier Variable gain amplifier

1992-02-14

1993-06-08

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330284, 330311, 330259, H03F 330

Patent

active

052183181

ABSTRACT:
A variable gain amplifier is provided which includes a pair of common emitter circuits. A resistance between the collectors of a pair of transistors included within the common emitter circuits is reduced by a variable resistance used for DC level correction which is connected in parallel with a variable resistance used for gain adjustment which is connected between the collectors, thereby reducing the degree of correlation between the width of a variable range of gain and a bandwidth.

REFERENCES:
National Technical Report, section 3.2.2, "Variable Gain Control Circuit", vol. 27, No. 1, Feb. 1981, pp. 32-39.

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