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. 17, 2018
Filed:
Jun. 15, 2016
Winbond Electronics Corp., Taichung, TW;
Kazuki Yamauchi, Taichung, TW;
Naoaki Sudo, Taichung, TW;
Winbound Electronics Corp., Taichung, TW;
Abstract
A non-volatile semiconductor memory device is provided. A determination circuitused to determine the suspected qualification is connected with a plurality of page buffer/sensing circuitsvia wirings PB_UP, PB_MG, PB_DIS. The page buffer/sensing circuitincludes a transistor Qin which a reference current Iref flows through a transistor Qwhen the programming verification is unqualified. The determination circuitincludes a comparator CMP, a voltage of the wiring PB_UP is supplied to one of input terminals of the comparator CMP, and a reference voltage Vref is supplied to another one of the input terminals. The reference voltage Vref is generated by a reference current (Iref*N) whose amount is corresponding to an unqualified bit number (N) which is determined to be suspectedly qualified.