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:
May. 03, 2016
Filed:
Jan. 19, 2015
Applicant:
Stmicroelectronics (Shenzhen) R&d Co. Ltd, Shenzhen, CN;
Inventors:
Mei Yang, Shenzhen, CN;
YueHua Wang, Shenzhen, CN;
Xaut Zhang, Shenzhen, CN;
Kelvin Wen, Shenzhen, CN;
XiangSheng Li, Shenzhen, CN;
Assignee:
STMICROELECTRONICS (SHENZHEN) R&D CO. LTD., Shenzhen, CN;
Primary Examiner:
Int. Cl.
CPC ...
H03K 5/22 (2006.01); H03F 3/21 (2006.01); H03F 3/26 (2006.01); H03F 3/187 (2006.01); H03F 3/45 (2006.01); H03F 3/68 (2006.01);
U.S. Cl.
CPC ...
H03F 3/211 (2013.01); H03F 3/187 (2013.01); H03F 3/26 (2013.01); H03F 3/4508 (2013.01); H03F 3/45475 (2013.01); H03F 3/68 (2013.01); H03F 2200/03 (2013.01); H03F 2203/21131 (2013.01); H03F 2203/45102 (2013.01); H03F 2203/45154 (2013.01); H03F 2203/45244 (2013.01); H03F 2203/45528 (2013.01); H03F 2203/45552 (2013.01);
Abstract
A clamping circuit for a class AB amplifier includes a reference voltage circuit, four NPN Darlington transistors having inputs coupled to the reference voltage circuit, and outputs for providing four clamped voltages and a split NPN Darlington transistor having an input coupled to the reference voltage circuit, and four separate outputs for providing four AC ground voltages.