Arrangement for protecting the output transistors in a power amp

Details Arrangement for protecting the output transistors in a power amp Arrangement for protecting the output transistors in a power amp

1997-10-30

1999-08-24

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including protection means

330207P, H02H 720, H03F 2100

Patent

active

059429453

ABSTRACT:
In an arrangement for protecting the output transistors in a power amplifier against temperatures exceeding a predetermined first temperature value, a temperature sensor is provided adjacent to the output transistors to sense their temperature and influence the power amplifier when the first temperature value is reached. The temperature sensor is adapted to vary the driving current of the power amplifier inversely proportional to the temperature of the output transistors for temperature values between the first temperature value and a predetermined higher temperature value.

REFERENCES:
patent: 3449680 (1969-06-01), Schilb et al.
patent: 3942075 (1976-03-01), Maran et al.
patent: 4152668 (1979-05-01), Kusumi
patent: 4158180 (1979-06-01), Challen
patent: 4523154 (1985-06-01), Congdon
patent: 4757271 (1988-07-01), Beale
patent: 4779161 (1988-10-01), DeShazo, Jr.
patent: 5383083 (1995-01-01), Shinoda et al.

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