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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.:

US 10284152 B1

PDFFull Text
Date of Patent:
May. 07, 2019

Filed:

Sep. 29, 2016

Amplifier, audio signal output method, and electronic device

Applicant:

Sony Semiconductor Solutions Corporation, Kanagawa, JP;

Inventor:

Sachio Akebono, Kanagawa, JP;

Assignee:

SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa, JP;

Attorney:

Chip Law Group

Primary Examiner:

Sonia L Gay

Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03F 3/217 (2006.01); H03F 3/34 (2006.01); H03F 3/183 (2006.01); H03F 3/21 (2006.01); H04R 3/00 (2006.01); H03F 1/34 (2006.01); H03F 3/187 (2006.01);
U.S. Cl.
CPC ...
H03F 1/34 (2013.01); H03F 3/183 (2013.01); H03F 3/187 (2013.01); H03F 3/211 (2013.01); H03F 3/217 (2013.01); H03F 3/2173 (2013.01); H03F 3/45071 (2013.01); H03F 3/45475 (2013.01); H04R 3/00 (2013.01); H03F 2200/03 (2013.01); H03F 2200/123 (2013.01); H03F 2200/129 (2013.01); H03F 2200/171 (2013.01); H03F 2200/267 (2013.01); H03F 2200/351 (2013.01); H03F 2200/387 (2013.01); H03F 2203/21139 (2013.01); H03F 2203/21157 (2013.01); H03F 2203/45022 (2013.01); H03F 2203/45116 (2013.01); H03F 2203/45138 (2013.01); H03F 2203/45521 (2013.01); H03F 2203/45528 (2013.01);
Abstract

The present technology relates to an amplifier, an audio signal output method, and an electronic device that can inhibit unintended sound output in a class D amplifier that changes a peak value of a PWM signal. The amplifier includes: a positive-side amplitude generating circuit configured to generate positive-side amplitude of an output PWM signal that is a PWM signal to be output outside an apparatus; a negative-side amplitude generating circuit configured to generate negative-side amplitude of the output PWM signal; and a feedback circuit configured to feed back a difference between the amplitude generated by the positive-side amplitude generating circuit and the amplitude generated by the negative-side amplitude generating circuit to the positive-side amplitude generating circuit and the negative-side amplitude generating circuit. The present technology is applicable, for example, to an amplifier or the like of an electronic device such as an audio player.

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