Single-ended push-pull amplifier with two complementary push-pul

Details Single-ended push-pull amplifier with two complementary push-pul Single-ended push-pull amplifier with two complementary push-pul

1981-07-01

1983-12-20

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330268, H03F 326

Patent

active

044220502

ABSTRACT:
An single-ended push-pull amplifier comprises first and second complementary single-ended push-pull circuits connected in parallel across a power source. Each push-pull circuit has paired complementary transistors and an output connected together to drive a common load such as a loudspeaker. Inputs of the first and second push-pull circuits are connected with a bias circuit connected to receive an audio signal to be amplified. The first to fourth transistors are so controlled that the first and second transistors are operated Class A at small signal levels, and the first and fourth complementary transistor pair and the second and third complementary transistor pair are operated Class B at large signal levels, thus producing a low distortion factor and a high power efficiency.

REFERENCES:
patent: 3968450 (1976-07-01), Suzuki

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