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. 06, 2007
Filed:
Feb. 14, 2005
Kok-soon Yeo, Singapore, SG;
Lian-chun Xu, Singapore, SG;
Chee-keong Teo, Singapore, SG;
John Julius DE Leon Asuncion, Singapore, SG;
Wai-keat Tai, Singapore, SG;
Kok-Soon Yeo, Singapore, SG;
Lian-Chun Xu, Singapore, SG;
Chee-Keong Teo, Singapore, SG;
John Julius de Leon Asuncion, Singapore, SG;
Wai-Keat Tai, Singapore, SG;
Abstract
In one embodiment, a comparator is provided with a first differential input stage that receives an input voltage and a reference voltage and produces a first differential output, and a second differential input stage that has differential inputs and produces a second differential output. A comparator stage produces a comparator output in response to the first and second differential outputs. The comparator also has a hysteresis control circuit, the components of which include 1) a resistor and a hysteresis regulating voltage input, coupled between the differential inputs of the second differential input stage, 2) first and second current generators, and 3) at least one switch, under control of the comparator output, to alternately enable different combinations of the first and second current generators, thereby inducing a first or a second current through the resistor.