Audio amplifying apparatus and method

Details Audio amplifying apparatus and method Audio amplifying apparatus and method

1984-06-01

1986-04-29

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330267, H03F 330

Patent

active

045860025

ABSTRACT:
An audio amplifier operatively connected to the secondary winding of a power transformer. The primary winding of the transformer is connected through a control circuit which has switch means that is turned on and off during selected portions of half cycles of the voltage imposed upon the primary winding of the transformer. By turning the switch on and off at appropriate intervals, the proper amounts of electrical energy can be delivered to supply the power requirements for amplification, while substantially reducing problems of idling currents in the primary winding of the transformer. Thus, the transformer can be made much smaller than in power supplies of conventional amplifiers.

REFERENCES:
patent: 3466527 (1969-09-01), Chun
patent: 3506905 (1970-04-01), Thomas
patent: 4051425 (1977-09-01), Smith
patent: 4321662 (1982-03-01), Yokoyama
Walker, "SCR Power Supplies", Electronics World, Oct. 1971, pp. 36-38, 62.

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