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. 14, 2021
Filed:
Oct. 20, 2020
Silicon Storage Technology, Inc., San Jose, CA (US);
Hieu Van Tran, San Jose, CA (US);
Anh Ly, San Jose, CA (US);
Thuan Vu, San Jose, CA (US);
Kha Nguyen, Ho Chi Minh, VN;
Hien Pham, Ho Chi Minh, VN;
Stanley Hong, San Jose, CA (US);
Stephen T. Trinh, San Jose, CA (US);
SILICON STORAGE TECHNOLOGY, INC., San Jose, CA (US);
Abstract
Numerous embodiments of an improved charge pump design are disclosed for generating the high voltages necessary to perform erase and program operations in non-volatile flash memory devices. In these embodiments, each boost stage in the charge pump is modified to overcome a deficiency in prior art charge pumps whereby voltage actually would decrease in the final boost stage. These modifications include the addition of one or more of a clock doubling circuit, a local self-precharge circuit, a feed-forward precharge circuit, a feed-backward precharge circuit, and a hybrid circuit comprising NMOS and PMOS transistors and diodes.