Title:
POWER AMPLIFIER
Document Type and Number:
Japanese Patent JP3894305
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a class D power amplifier for reducing radiation arising from the edge of an output voltage.
SOLUTION: The amplifier is provided with: a pair of PWM modulation circuits 11, 12 to be supplied with an input signal; a pair of push-pull circuits 15, 16; and drive circuits 13, 14 which supply the output of the PWM modulation circuits 11, 12 as a drive signal to the push-pull circuits 15, 16. A loudspeaker 19 is connected between the output end of the push-pull circuit 15 and the output end of the push-pull circuit 16. The drive circuits 13, 14 are switched every cycle of a pulse modulation signal so that the drive signal to be supplied to the push-pull circuits 15, 16 does not change at a break point of every cycle of the pulse modulation signal.
Inventors:
Toshihiko Masuda
Kazuatsu Oguri
Kazuatsu Oguri
Application Number:
JP2002162437A
Publication Date:
March 22, 2007
Filing Date:
June 04, 2002
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H03F3/217; H03K17/16; H03F1/26; H03F3/30; H03K17/695; (IPC1-7): H03F3/217; H03F3/30; H03K17/16; H03K17/695
Domestic Patent References:
| JP2003152468A | ||||
| JP2002158549A | ||||
| JP2002158544A | ||||
| JP2001292040A | ||||
| JP2001185961A |
Attorney, Agent or Firm:
Masami Sato