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:
Mar. 06, 2012
Filed:
Jun. 30, 2008
Julian Tyrrell, Swindon, GB;
David Clewett, Swindon, GB;
Julian Tyrrell, Swindon, GB;
David Clewett, Swindon, GB;
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Abstract
Circuits and methods to achieve a switch interface circuit for a single pole, single throw (SPST) momentary push-button switch consuming a few tens of nanoamps whilst the push-button switch is closed, having low impedance input path when the switch is open in order to eliminate RFI interference have been achieved. The two states of the push-button switch, open and closed, maintain a low impedance path to one of the power supplies. The supply current is zero when the switch is open and is minimized whilst the switch is closed. The asynchronous edge triggered detection of the switch event allows an extended switch open to closed transition operation.