The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 1989
Filed:
Feb. 26, 1988
Kazuo Imanishi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
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.