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:
May. 11, 2021
Filed:
Feb. 21, 2020
Powerchip Semiconductor Manufacturing Corporation, Hsinchu, TW;
Akitomo Nakayama, Tokyo, JP;
Powerchip Semiconductor Manufacturing Corporation, Hsinchu, TW;
Abstract
A fail bit number counting circuit includes a data transfer circuit configured by a series circuit in which switch elements turned on for calculation result data indicating a pass bit from each page buffer portion and turned off for calculation result data indicating a fail bit are connected in series; a control circuit inputs a counting enable signal to one input terminal of the data transfer circuit, and sequentially transfers the counting enable signal till the next switch element being turned off via the series circuit corresponding to a clock with a prescribed cycle; and the fail bit number counting circuit includes a clock counter by which the number of clocks till the counting enable signal reaches the other output terminal of the data transfer circuit after the counting enable signal is input to one input terminal of the data transfer circuit is counted as a fail bit number.