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:
Dec. 30, 2014
Filed:
Aug. 25, 2011
Applicants:
Yi-xin Tu, Shenzhen, CN;
Hai-qing Zhou, Shenzhen, CN;
Inventors:
Yi-Xin Tu, Shenzhen, CN;
Hai-Qing Zhou, Shenzhen, CN;
Assignees:
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, CN;
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/26 (2014.01);
U.S. Cl.
CPC ...
G01R 31/2614 (2013.01);
Abstract
A test circuit includes a first test circuit. The first test circuit includes a first light-emitting diode (LED) and a first resistor. An anode of the first LED is connected to a power supply. A cathode of the first LED is connected to a collector of a bipolar junction transistor (BJT) through the first resistor. An emitter of the BJT is grounded. A base of the BJT is connected to the power supply. A type of the BJT can be determined according to status of the first LED.