Shift register comprising electrical fuse and related method

Details Shift register comprising electrical fuse and related method Shift register comprising electrical fuse and related method

2008-09-16

2008-09-16

Tan, Vibol (Department: 2819)

Electrical pulse counters, pulse dividers, or shift registers: c

Shift register

Particular output circuit

C377S069000, C377S064000, C365S200000, C365S225700, C365S225600

Reexamination Certificate

active

11723360

ABSTRACT:
A shift register including an electrical fuse and a method of operating the shift register are disclosed. The shift register includes a register flip-flop group circuit and a plurality of output circuits respectively receiving a plurality of enable signals. Each output circuit includes a fuse control flip-flop receiving one of the plurality of enable signals and outputting a fuse control signal in response to the one enable signal. Each output circuit also includes an electrical fuse receiving the fuse control signal and outputting an electrical fuse mode signal, and a multiplexer outputting either the register output signal or the electrical fuse mode signal as a final output signal in accordance with the one enable signal.

REFERENCES:
patent: 5677917 (1997-10-01), Wheelus et al.
patent: RE35797 (1998-05-01), Graham et al.
patent: 5941974 (1999-08-01), Babin
patent: 6418182 (2002-07-01), Suyama et al.
patent: 6426911 (2002-07-01), Lehmann et al.
patent: 6577553 (2003-06-01), Makabe et al.
patent: 2005/0201165 (2005-09-01), Ashizawa
patent: 2005/0276369 (2005-12-01), Mutaguchi

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