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. 13, 2008
Filed:
Feb. 21, 2007
Matthew Courcy, Fremont, NH (US);
Jipeng LI, Nashua, NH (US);
Matthew Courcy, Fremont, NH (US);
Jipeng Li, Nashua, NH (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A data conversion stage circuit () for an opamp-shared pipeline analog-to-digital converter (ADC) () includes an over-range detection and recovery circuit including first and second switches (S, S) connected between respective input terminals () and output terminals () of the opamp () and both controlled by a first control signal, and a logic circuit () coupled to receive the first residue value and compare the first residue value to a pair of high and low comparison voltage levels. The logic circuit asserts the first control signal during a first clock phase when the first residue value is either greater than the high comparison voltage level or less than the low comparison voltage level. The high and low comparison voltage levels define a voltage region outside of a reference voltage range of the data conversion stage circuit where the reference voltage range defines in-range voltage values for the data conversion stage circuit.