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:
Apr. 25, 1995
Filed:
Apr. 04, 1994
Applicant:
Inventor:
Richard J Molnar, Willoughby, OH (US);
Assignee:
Elsag International N.V., Amsterdam, NL;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ; H03M / ; H03M / ;
U.S. Cl.
CPC ...
341143 ; 341131 ; 341164 ;
Abstract
A sigma-delta technique is used to generate a digital representation of the incoming analog signal amplitude. The integration stage of the converter holds an analog error term relative to the ratio of an incoming analog input signal to a reference voltage. The incoming analog signal is disconnected at the end of the conversion. The error term is monitored through a comparator as charge packets are applied to the input of the integration stage. The number of charge packets needed to have the error term cross zero provides information which can be used to extend the resolution of the analog to digital converter.