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:
May. 17, 2011
Filed:
Jan. 14, 2010
Frank Ohnhaeuser, Stein, DE;
Andreas Wickmann, Nuremberg, DE;
Frank Ohnhaeuser, Stein, DE;
Andreas Wickmann, Nuremberg, DE;
Texas InstrumentsDeutschland GmbH, Freising, DE;
Abstract
An apparatus for analog-to-digital conversion using successive approximation is provided, which is adapted to be supplied with a single ended supply voltage. The device includes: a first analog-to-digital conversion stage including a first set of capacitors coupled with a side at a common node and adapted to sample an input voltage and to be coupled to either a first reference voltage level or a second reference voltage level, at least one capacitor of the first set of capacitors being adapted to be left floating, a control stage being adapted to connect the at least one floating capacitor to the first reference voltage level or the second reference voltage level in response to an analog-to-digital conversion decision made by a second analog-to-digital conversion stage. The first analog-to-digital conversion stage is operable to couple the common node to a supply voltage level, in particular ground, during analog-to-digital conversion.