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:
Jun. 09, 2020
Filed:
Aug. 25, 2016
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Changning District, Shanghai, CN;
Yu Lei, Shanghai, CN;
Houpeng Chen, Shanghai, CN;
Xi Li, Shanghai, CN;
Qian Wang, Shanghai, CN;
Zhitang Song, Shanghai, CN;
SHANGHAI INSTITUTE OF MICROSYSTEM AND INFORMATION TECHNOLOGY, CHINESE ACADEMY OF SCIENCE, Changning District, Shanghai, CN;
Abstract
A read circuit of storage class memory comprises: an array; a read reference circuit, having the same bit line parasitic parameters as the array, having the same read transmission gate parasitic parameters as the array, used to generate a read reference current; a sense amplifier, providing the same current mirror parasitic parameters as the reference side, used to generate a read current from a selected memory cell, compare the said read current with the said read reference current and output a readout result. In the present invention, the said read current and the said read reference current are generated at the same time, the transient curve of the said read reference current is between the low resistance state read current and the high resistance state read current from an early stage. The present invention largely reduces the read access time, has a good process variation tolerance, has a wide application, and is easy to be used in the practical product.