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:
Dec. 17, 2013
Filed:
May. 25, 2009
Christer Jansson, Linkoping, SE;
Christer Jansson, Linkoping, SE;
CSR Technology Inc., Sunnyvale, CA (US);
Abstract
A comparator circuit () comprising a fully differential main amplifier unit (). The main amplifier unit () comprises a control port and is adapted to control a bias current of a first branch of the main amplifier unit () and/or a bias current of a second branch of the main amplifier unit () in response to one or more control voltages supplied to the control port of the main amplifier unit (). The comparator circuit () comprises circuitry () for balancing the voltages at the positive and negative input terminals () of the main amplifier unit () during a first clock phase of the comparator circuit (). Furthermore, the comparator circuit () comprises a switched-capacitor accumulator unit with a differential input. The switched-capacitor accumulator unit is operatively connected to the positive and negative output terminals () of the main amplifier unit () for sampling voltages at the positive and negative output terminals () of the main amplifier unit () during the first clock phase, and operatively connected to the control port of the main amplifier unit () for supplying said one or more control voltages.