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:
Nov. 29, 2005
Filed:
Feb. 24, 2004
Chris Smith, Essex Junction, VT (US);
David Chapman, Shelburne, VT (US);
Tim Fiscus, South Burlington, VT (US);
Chris Smith, Essex Junction, VT (US);
David Chapman, Shelburne, VT (US);
Tim Fiscus, South Burlington, VT (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A power supply detecting input receiver circuit () can include a multiplexing capability that can select one of at least two power supplies during a non-critical timing period. Such selection of a power supply can reduce both the standby and the active current of input receiver circuit (). In one arrangement, an input receiver circuit () can include a comparator (), a latch (), and a select circuit (). A latch () can be enabled to indicate a selection of a supply upon a circuit power-up, as but one example. A method is disclosed that includes comparing at least two supply voltages, setting a latch to indicate a selected supply, and providing the selected supply to an input receiver. The receiver output signal may be voltage-translated to a suitable internal supply level.