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. 15, 2001
Filed:
Sep. 15, 1999
Masami Wada, Tokyo, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Abstract
A sigma-delta analog-to-digital (A/D) converter comprising an input terminal, an adder, an integrator, a comparator and a flip flop circuit connected in series, with an output signal of the flip flop circuit being provided at an output terminal, and being fed back to the adder through a digital-to-analog (D/A) converter, so that the A/D converter provides a pulse density signal corresponding to a given input signal, wherein the comparator output is isolated from the input terminal of the flip flop circuit, and the output of the flip flop circuit is isolated from the D/A converter input terminal thereby achieving reduction of current consumption. The invention is useful in two wire vortex flowmeters, for example.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile