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:
Sep. 07, 2004
Filed:
Jul. 07, 2003
Rainer Krenzke, Esslingen, DE;
Dirk Killat, Kirchheim-Teck, DE;
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, US;
Abstract
A circuit and method are given, to realize a high voltage comparator, which generates an output signal for follow-up processing in the low-voltage domain. The high-voltage comparison task is essentially replaced by a current comparison, implemented as a combination of a voltage to current transforming stage with a CMOS current comparator circuit, where only very few parts are working in the high voltage domain. Using the intrinsic advantages of that solution the circuit of the invention is manufactured with standard CMOS technology and only four discrete or integrated extended drain MOS components at low cost. This solution reduces the complexity of the circuit and in consequence also power consumption and manufacturing cost.