Audio apparatus, switching power supply, and switching...

Details Audio apparatus, switching power supply, and switching... Audio apparatus, switching power supply, and switching...

2008-10-15

2011-11-08

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S271000, C323S204000

Reexamination Certificate

active

08054053

ABSTRACT:
When power is turned on and in a state in which a power supply voltage is not supplied from the switching power supply to the second clock generating section, the first clock generating section generates a first clock signal with a frequency that is preset in the first clock generating section, without using a third clock signal from the frequency dividing section, to cause the first switching section to operate. By the first switching section operating, a power supply voltage is supplied from the switching power supply to the second clock generating section. After the second clock generating section has started to operate, a third clock signal (a clock signal obtained by dividing the frequency of a second clock signal generated by the second clock generating section) is supplied from the frequency dividing section to the first clock generating section. The first clock generating section generates a first clock signal with a frequency that is synchronized with the frequency of the third clock signal, to cause the first switching section to operate.

REFERENCES:
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patent: 6831508 (2004-12-01), Shima
patent: 2003/0169103 (2003-09-01), Shima
patent: 2009/0225990 (2009-09-01), Miyagi
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patent: 2006-60580 (2006-03-01), None
patent: 2002/67416 (2002-08-01), None

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