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. 27, 2007
Filed:
Apr. 13, 2006
Applicant:
Masahiro Kishida, Yaita, JP;
Inventor:
Masahiro Kishida, Yaita, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A switching amplifier of the present invention includes a delta-sigma modulation circuit for processing an input signal by delta-sigma modulation to output a one-bit signal, a delay circuit for delaying the one-bit signal, and a pulse amplifier having a switching device that switches the switching device according to the signal outputted from the delay circuit to perform pulse amplification of the signal outputted from the delay section. The delay time of the delay circuit is variable. With this configuration, enhanced performance is obtained without changing the sampling frequency of the delta-sigma modulation circuit.