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:
Mar. 14, 2000
Filed:
Feb. 23, 1998
Applicant:
Inventor:
Richard Steven Griph, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341161 ; 341155 ; 327491 ;
Abstract
A low power serial A/D converter cascades multiple stages (20) of a novel track-and-hold circuit (22) to implement a pipelined A/D converter. The track-and-hold circuit (22) is implemented using a differential structure to cancel out signal droop. This allows extremely high tracking bandwidths to be achieved while maintaining long hold times. Each stage (20) of the pipeline includes a binary quantizing circuit (24) which performs a 1-bit binary estimate of the data and a summing circuit (26) which updates the output of its track-and-hold circuit (22) to allow the next bits to be decided by the following stages.