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:
Feb. 17, 2015
Filed:
Sep. 13, 2013
Cadence Design Systems, Inc., San Jose, CA (US);
William Pierce Evans, Catonsville, MD (US);
Cadence Design Systems, Inc., San Jose, CA (US);
Abstract
A system and method are provided for the detection and correction of metastability errors in a successive approximation analog to digital converter (ADC). The successive approximation ADC () includes a comparator unit () that includes a NAND gate circuit () that outputs a comp_rdy_n signal when the comparator () has latched a result. ADC () includes a metastability detection and correction circuit () that includes a first logic circuit () that monitors the comp_rdy_n signal and detects a metastable event if that signal is not received within a portion of a conversion time period of the ADC. Responsive to detection of a metastable event, a second logic circuit () generates a correct conversion code at the output of the ADC. If no metastable event is detected during a conversion cycle of the ADC, the second logic circuit () outputs the conversion codes determined by the comparator ().