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:
Feb. 27, 2007
Filed:
Aug. 27, 2004
Eric K. Bolton, Broomfield, CO (US);
Steven Meyers, Round Rock, TX (US);
Eric K. Bolton, Broomfield, CO (US);
Steven Meyers, Round Rock, TX (US);
Cypress Semiconductor Corp., San Jose, CA (US);
Abstract
A charge pump circuit with resistively attenuated inputs is described herein. By reducing a voltage swing of input signals supplied thereto, the charge pump circuit described herein is configured for producing output signals with relatively low static phase offset even when operating at relatively low power supply voltages (e.g., less than about 1.2 volts). In general, the input voltage swing may be reduced by coupling an attenuator to each input of the charge pump circuit. A method for operating the differential charge pump is described, along with exemplary devices (e.g., PLL and DLL devices) within which the charge pump may be utilized.