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:
Jan. 06, 2015
Filed:
Aug. 30, 2013
Agilent Technologies, Inc., Loveland, CO (US);
Dusan Stepanovic, Mountain View, CA (US);
Keysight Technologies, Inc., Santa Rosa, CA (US);
Abstract
A charge redistribution SAR analog-to-digital converter includes a source of a reference voltage, a digital-to-analog converter, and a reset circuit. The digital-to-analog converter includes converter stages that range in significance from most significant to least significant. Each converter stage includes respective capacitors and switches. The switches are controllable to selectively connect the capacitors to the reference voltage or to ground. The capacitors of the converter stages are weighted in capacitance in accordance with significance of the converter stage. The reset circuit is to control the switches to reset the converter stages with a temporal offset between at least two of the converter stages. The temporal offset between the at least two of the converter stages reduces the dependence of the charge drawn from the reference voltage source during each conversion cycle on the sample of an analog input signal converted to a digital value during the conversion cycle.