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. 26, 2013
Filed:
Jan. 04, 2011
Ching-wei Wu, Caotun Town, Nantou County, TW;
Cheng-hung Lee, Hsinchu, TW;
He-zhou Wan, Shanghai, CN;
Wei-yang Jiang, Zhejiang, CN;
Ching-Wei Wu, Caotun Town, Nantou County, TW;
Cheng-Hung Lee, Hsinchu, TW;
He-Zhou Wan, Shanghai, CN;
Wei-Yang Jiang, Zhejiang, CN;
Taiwan Semiconductor Manufacturing Co., Ltd., Hsin-Chu, TW;
Abstract
A read only memory (ROM) and an operating method thereof are provided. The read only memory includes: a control circuit, powered by a first power source for outputting a control signal within a first voltage range; a voltage shifter, for expanding the amplitude of the control signal to a second voltage range; a word line driver, powered by a second power source with a voltage which is higher than that of the first power source, for driving one of a plurality of word lines of a read only memory cell array according to the control signal which is expanded to be within the second voltage range; and an input/output circuit, for connecting the plurality of bit lines to read out messages.