Operational amplification circuit capable of driving a high load

Details Operational amplification circuit capable of driving a high load Operational amplification circuit capable of driving a high load

1997-02-21

1999-05-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Nonlinear amplifying circuit

327560, 327561, 327562, 330253, 330255, 330261, H03F 316

Patent

active

059072598

ABSTRACT:
An operational amplification circuit having no crossover distortion includes a pair of differential amplification circuits, a pair of level shift circuits, a pair of current source circuits, and an output circuit. Each of the differential amplification circuits includes two MOS transistors having gates connected to a respective pair of input terminals. The differential amplification circuits generate first and second signals. The level shift circuits connected to the differential amplification circuits shift the level of the first and second signals. Each of the level shift circuits includes complementary MOS transistors. The current source circuits supply a predetermined current to one of the transistors of the level shift circuits. The output circuit is connected to the level shift circuits for generating an output signal.

REFERENCES:
patent: 4800339 (1989-01-01), Tanimoto et al.
patent: 5083051 (1992-01-01), Whatley et al.
patent: 5142244 (1992-08-01), Glica et al.
patent: 5194824 (1993-03-01), Wu et al.
patent: 5289058 (1994-02-01), Okamoto
IEEE Journal of Solid-State Circuits, vol. 25, No. 3, Jun. 1, 1990, pp. 684-691; L.G.A. Callewaert et al., "Amplifiers with High Efficiency", p. 687, figure 5.

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