Amplifiers – With semiconductor amplifying device – Including protection means
Patent
1988-02-26
1989-04-11
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including protection means
330207P, 361 98, 361101, H03F 152
Patent
active
048210005
ABSTRACT:
A stand-by signal is supplied to a stand-by circuit for determining the operation condition is a normal operative mode or a stand-by mode to control the operation. An output signal of the stand-by circuit is delayed by a delay circuit. An output signal from the delay circuit is supplied to a bias circuit for generating a predetermined bias voltage. An audio signal supplied from the audio signal input terminal is amplified by an amplifier circuit based on the bias voltage from the bias circuit. When it is detected by an overcurrent detection circuit that an overcurrent flows in the amplifier circuit, supply of the bias voltage from the bias circuit to the amplifier circuit is interrupted by the protection circuit. The operation of the protection circuit is controlled by output signals from the delay circuit and the overcurrent detection circuit.
Kabushiki Kaisha Toshiba
Mullins James B.
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