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. 27, 2012
Filed:
Apr. 28, 2009
Todd Stuart Kaplan, Grass Valley, CA (US);
Todd Stuart Kaplan, Grass Valley, CA (US);
Linear Technology Corporation, Milpitas, CA (US);
Abstract
Methods and systems for analog to digital converter and systems incorporating the same are provided. Specifically, an analog sampler that has a reduced input current is disclosed. According to the present teaching, an apparatus for sampling an input voltage includes a first switch having its first terminal connected to an input voltage, and a first pre-charging circuit, coupled to a second terminal of the first switch, that provides a first pre-charged voltage that is substantially equal to the input voltage. The first pre-charged voltage is provided at the first terminal of the first switch before the first switch is turned on. The apparatus further includes a second pre-charging circuit coupled to both the first pre-charging circuit and the second terminal of the first switch, where the second pre-charging circuit charges the first pre-charged voltage prior to the first switch being turned on.