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:
Apr. 21, 2020
Filed:
Feb. 25, 2019
Richtek Technology Corporation, Zhubei, Hsinchu, TW;
Isaac Y. Chen, Hsinchu, TW;
Yin-Chang Chen, Hsinchu, TW;
RICHTEK TECHNOLOGY CORPORATION, Zhubei, Hsinchu, TW;
Abstract
A memory circuit includes a memory unit, a memory control circuit and a pseudo ground voltage generation circuit. The memory control circuit includes: a level shifter circuit coupled to a variable supply voltage; a driver circuit coupled to the pseudo ground voltage generation circuit at the pseudo ground node. The driver circuit is powered by the variable supply voltage and generates an access signal according to the driving signal, to access data from the memory unit. Under a high-voltage operation, the variable supply voltage provides a first supply voltage level, so that a high level of the access signal corresponds to the first supply voltage level and the pseudo ground voltage generation circuit provides a pseudo ground voltage level at the pseudo ground node. A voltage difference between the first supply voltage level and the pseudo ground voltage level is smaller than a withstand voltage of the driver circuit.