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:
Jun. 07, 2005
Filed:
Mar. 08, 2002
Applicants:
Rong Yin, Coppell, TX (US);
Tom Youssef, Dallas, TX (US);
David Mcclure, Carrollton, TX (US);
Inventors:
Assignee:
STMicroelectronics, Inc., Carrollton, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03L007/06 ; H02B001/24 ;
U.S. Cl.
CPC ...
Abstract
A circuit and method are disclosed for detecting activation of a switch, such as a mechanical switch. The circuit may include a first circuit for temporarily driving the second terminal of the switch to a second logic level. A second circuit, coupled to the switch, senses a voltage level of the second terminal of the switch and generates an output signal representative of the voltage sensed. A sequential logic circuit is responsive to the output signal of the second circuit so as to maintain a logic value representative of the switch having been closed.