Logarithmic digitally variable gain controlled amplifier

Details Logarithmic digitally variable gain controlled amplifier Logarithmic digitally variable gain controlled amplifier

1984-10-01

1986-03-04

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

328145, H03G 320, G06G 724

Patent

active

045742510

ABSTRACT:
An integratable amplifier circuit is provided including a current generator section, a digital control section and a variable gain amplifier section. The integratable amplifier circuit is compatible with the bipolar process and can be included on an integrated circuit, such as one performing receiver and audio functions. The current generator section produces a biasing current which is applied to a digital control section which divides the biasing current according to a binary input signal to produce a control current equal to a predetermined fraction of the biasing current, corresponding to a predetermined logarithmic attenuation. The control current is applied to a control input of the variable gain amplifier section to vary the gain thereof in logarithmic steps.

REFERENCES:
patent: 2781967 (1957-02-01), Spencer et al.
patent: 3488484 (1970-01-01), Royer
patent: 3653033 (1972-03-01), Bonami et al.
patent: 3736515 (1973-05-01), Kadron et al.
patent: 3757234 (1973-09-01), Ohlson
patent: 3811088 (1974-05-01), Hekimian
patent: 3878383 (1975-04-01), Uchida
patent: 4143363 (1979-03-01), Dotter, Jr.
patent: 4300203 (1981-11-01), Brown
patent: 4349755 (1982-09-01), Bee
patent: 4413235 (1983-11-01), Jason
IEEE Journal of Solid-State Circuits, vol. SC-16, No. 6, Dec. 1981, Article entitled "A Volume and Tone Control IC for Hi-Fi Audio" by Maki Sato, Kazuo Suzuki, Tadao Suzuki, and Kinya Akutsu, pp. 682-689.

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