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. 23, 2014
Filed:
Dec. 23, 2013
International Business Machines Corporation, Armonk, NY (US);
Joel T. Ficke, Bloomer, WI (US);
David M. Friend, Rochester, MN (US);
Grant P. Kesselring, Rochester, MN (US);
James D. Strom, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system is disclosed, which may include a differential charge pump. The differential charge pump may include a first and a second H-bridge circuit, each driving, on a respective output, an output current that is substantially similar over an output voltage operating range. The differential charge pump may be designed to receive increment, decrement and bias signals, and drive, in response to the increment and decrement signals, the output current to draw each H-bridge circuit output towards a first or a second supply voltage. The differential charge pump may also be designed to increase, in response to the bias signals, the output voltage operating range over which the output current is substantially similar. The differential charge pump may also include a bias signal generator, designed to generate bias signals in response to H-bridge circuit output voltages.