Integratable amplifier circuit

Details Integratable amplifier circuit Integratable amplifier circuit

1990-03-28

1991-07-23

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330255, 330259, H03F 345

Patent

active

050347004

ABSTRACT:
An integratable amplifier circuit includes a preamplifier stage, a drive stage, a push-pull end stage, and a regulating stage forming a differential value from a reference current and from a measurement current proportional to the static current flowing through the push-pull end stage. The regulating stage stores the diferential value or a value proportional thereto upon the occurrence of a control signal at a control input indicating the non-level control of the preamplifier stage and sets the static current of the push-pull end stage by varying the operating point of the push-pull end stage as a function of the stored value.

REFERENCES:
patent: 4320347 (1982-03-01), Haque
patent: 4458213 (1984-07-01), Quan
patent: 4476441 (1984-10-01), Gulczynski
patent: 4897616 (1990-01-01), Wang et al.
IEEE Journal of Solid-State Circuits, vol. SC-18, No. 1, Feb. 1983, pp. 121-127, IEEE, New York, U.S.; V. R. Saari: "Low-Power High-Drive CMOS Operational Amplifiers".
IEEE Journal of Solid-State Circuits, vol. SC-18, No. 6, Dec. 1983, pp. 624-629, IEEE, New York, U.S., K. E. Brehmer et al.: "Large Swing CMOS Power Amplifier".

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