Amplifiers – With semiconductor amplifying device – Including particular power supply circuitry
Patent
1998-09-18
2000-12-26
Pascal, Robert
Amplifiers
With semiconductor amplifying device
Including particular power supply circuitry
381120, H03F 304
Patent
active
06166605&
ABSTRACT:
An audio amplifier having an amplifier section and a power supply. The power supply comprises a positive power supply section and a negative power supply section, each of which provides voltage to the positive and negative power inputs to the amplifier. The control circuitry for the power supply sections causes the voltage output from the power supply sections to vary in accordance with the amplitude of the audio signal so that the power supply voltages track the positive and negative components of the audio signal so that the supply voltages are at a predetermined level above and below the positive and negative components of the audio signal, respectively. Each of the power supply sections has a pair of switches which open and close alternately to transmit power pulses to opposite ends of the primary winding, and the secondary winding in turn transmit power pulses alternately through a filter component to its respective input of the amplifier section.
REFERENCES:
patent: 3828267 (1974-08-01), Tsurushima
patent: 4651112 (1987-03-01), Keysor
patent: 5847610 (1998-12-01), Fujita
Hughes Robert B.
Nguyen Khanh Van
Pascal Robert
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