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. 23, 2013
Filed:
Jun. 20, 2011
BO Liu, Milpitas, CA (US);
Jongmin Park, Cupertino, CA (US);
Chen Chen, Mountain View, CA (US);
Tien-chien Kuo, Sunnyvale, CA (US);
Bo Liu, Milpitas, CA (US);
Jongmin Park, Cupertino, CA (US);
Chen Chen, Mountain View, CA (US);
Tien-chien Kuo, Sunnyvale, CA (US);
SanDisk Technologies, Inc., Plano, TX (US);
Abstract
A circuit for counting in an N-bit string a number of bits M, having a first binary value includes N latch circuits in a daisy chain where each latch circuit has a tag bit that controls each to be either in a no-pass or pass state. Initially the tag bits are set according to the bits of the N-bit string where the first binary value corresponds to a no-pass state. A clock signal having a pulse train is run through the daisy chain to 'interrogate' any no-pass latch circuits. It races right through any pass latch circuit. However, for a no-pass latch circuit, a leading pulse while being blocked also resets after a pulse period the tag bit from 'no-pass' to “pass” state to allow subsequent pulses to pass. After all no-pass latch circuits have been reset, M is given by the number of missing pulses from the pulse train.