Circuit for limiting temperature without distortion in audio pow

Details Circuit for limiting temperature without distortion in audio pow Circuit for limiting temperature without distortion in audio pow

1990-05-15

1992-04-21

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

361 91, 361 98, 330207R, H03G 320

Patent

active

051073897

ABSTRACT:
A circuit for limiting temperature without distortion in audio power amplifiers, comprising a temperature sensor for sensing the temperature in an audio power amplifier, and a variable-gain amplifier connected ahead of the audio power amplifier circuit and having a gain control input connected to the temperature sensor to vary the input signal of the audio amplifier in a linear manner. A linear limitation of the power, and therefore of the temperature, is thus obtained in the audio amplifier without introducing distortion.

REFERENCES:
patent: 4742312 (1988-05-01), Osburn et al.
"Einsatz von Bipolaren Hochwolt-Leistungstransistoren in der Leistungselektronik", Mannel et al., Elektrie, vol. 36, No. 9, 1982, pp. 475-479.

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