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:
Nov. 07, 2006
Filed:
Nov. 18, 2004
Tupei Chen, Singapore, SG;
Chew-hoe Ang, Singapore, SG;
Shyue-seng Tan, Singapore, SG;
Jia-zhen Zheng, Singapore, SG;
Tupei Chen, Singapore, SG;
Chew-Hoe Ang, Singapore, SG;
Shyue-Seng Tan, Singapore, SG;
Jia-Zhen Zheng, Singapore, SG;
Chartered Semiconductor Manufacturing Ltd., Singapore, SG;
Abstract
This invention provides a circuit and a method for generating a low-level current using semiconductor charge pumping. The invention provides a means of generating a range of current sources by varying the frequency of a repetitive voltage pulse input signal. Also, this invention utilizes one or many MOSFET devices in order to produce higher levels of current. The current source embodiments of this invention generate very stable current sources with high input impedances.