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:
Nov. 28, 2006
Filed:
Nov. 01, 2004
Tokihiko Sawashi, Tokyo, JP;
Tokihiko Sawashi, Tokyo, JP;
Sony Corporation, , JP;
Abstract
A power amplification circuit includes a PWM signal generating portion operable to produce from an input signal first and second PWM signals having complementary variations in their respective pulse widths, a first delaying portion operable to delay the first PWM signal by a first time to produce a first delayed PWM signal, a first switching amplifier operable to perform a switching operation in response to the first delayed PWM signal to subject the first delayed PWM signal to power amplification to produce a first output signal, and to supply the first output signal to a circuit load, a second delaying portion operable to delay the second PWM signal by a second time different from the first time to produce a second delayed PWM signal, and a second switching amplifier operable to perform a switching operation in response to the second delayed PWM signal to subject the second delayed PWM signal to power amplification to produce a second output signal, and to supply the second output signal to the circuit load.