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. 23, 2010
Filed:
Jan. 24, 2005
William Maclean, Tucson, AZ (US);
Paul David Ranucci, Tucson, AZ (US);
William MacLean, Tucson, AZ (US);
Paul David Ranucci, Tucson, AZ (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An adaptive capacitor charge/discharge network tailors the rate-of-change of a capacitor. The network includes two circuit groups with two or more parallel circuit branches, each branch including a current source and a controllable switch connected in series. The parallel circuit branches of one group are connected to Vss, and the parallel circuit branches of the other group are connected to Vdd. All the parallel circuit branches are connected to one plate of a capacitor, the other plate of the capacitor is connected to either Vss or Vdd. A control circuit controls the switch status, and incrementally controls the charge/discharge of the capacitor according to a predetermined order and a predetermined timing sequence to achieve a desired tailored charge/discharge curve.