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:
Sep. 18, 2007
Filed:
Jun. 29, 2005
Douglas Piasecki, Austin, TX (US);
Michael Odland, Austin, TX (US);
Douglas Piasecki, Austin, TX (US);
Michael Odland, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
A SAR analog-to-digital Converter (ADC) is disclosed with variable gain having a SAR capacitor array with a plurality of switched capacitors therein with varying weights and a SAR controller for sampling an input voltage thereon in a sampling phase, and redistributing the charge stored thereon in a conversion phase in accordance with a SAR conversion algorithm. A gain adjust register is provided for defining an amount of charge to be added or subtracted from the capacitor array prior to the conversion phase relative to a predetermined amount of charge. A charge control device varies the amount of charge stored in the array prior to the conversion phase in accordance with the contents of the gain adjust register such that the amount of charge redistributed during the conversion phase is adjusted.