Amplifiers – With semiconductor amplifying device – Including particular power supply circuitry
Patent
1996-12-03
1998-10-20
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including particular power supply circuitry
381 945, 330 51, H03F 114, H04B 1500
Patent
active
058252517
ABSTRACT:
An audio signal amplifying circuit includes a switch circuit disposed between a first power source line and a second power source line for bootstrapping, and a capacitor for bootstrapping disposed between the second power source line and a line to which an output terminal is connected. The switch circuit is controlled from ON to OFF upon receiving a muting signal, and is provided with a first switch circuit constituted by Darlington connected transistors having an NPN type transistor as the output stage thereof and a second switch circuit constituted by a PNP type transistor disposed in parallel with the NPN type transistor. The sum of the rated current values of the NPN type transistor in the first switch circuit and the rated current value of the PNP type transistor in the second switch circuit is selected to be equal to or more than the maximum supply current value for the second power source line, and the rated current of the PNP type transistor in the second switch circuit is selected to be smaller than the rated current values of the transistors in the first switch circuit.
REFERENCES:
patent: 4433306 (1984-02-01), Honda et al.
patent: 5703528 (1997-12-01), Nebuloni et al.
Mottola Steven
Rohm & Co., Ltd.
LandOfFree
Audio signal amplifying circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Audio signal amplifying circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio signal amplifying circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-248744