Title:
オーディオ装置、スイッチング電源及びスイッチング制御方法
Document Type and Number:
Japanese Patent JP4300372
Kind Code:
B1
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.
Inventors:
Masahiko Katayama
Application Number:
JP2008045429A
Publication Date:
July 22, 2009
Filing Date:
February 27, 2008
Export Citation:
Assignee:
Onkyo Co., Ltd.
International Classes:
H03F1/26; H03F3/217
Domestic Patent References:
| JP2006060580A | ||||
| JP4159803A | ||||
| JP57115005A | ||||
| JP2005136717A | ||||
| JP2004297367A | ||||
| JP2001298330A |