Shift register

Details Shift register Shift register

2011-03-15

2011-03-15

Lam, Tuan (Department: 2816)

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

Shift register

C377S068000, C377S069000, C377S078000, C377S079000

Reexamination Certificate

active

07907696

ABSTRACT:
A shift register includes a plurality of stages cascade-connected with each other. Each stage includes a pull-up circuit, a pull-up driving circuit, and a pull-down circuit. The pull-up circuit coupled to a first clock signal is used for providing an output signal. The pull-up driving circuit includes a control circuit and a first transistor. The control circuit has a gate coupled to a previous stage, and a drain coupled to a second clock signal. The first transistor includes a gate coupled to the source of the control circuit, a drain coupled to a driving end of the previous stage, and a source coupled to a first input end. The pull-down circuit pulls down voltage on the first input end.

REFERENCES:
patent: 5410583 (1995-04-01), Weisbrod et al.
patent: 6339631 (2002-01-01), Yeo et al.
patent: 7286627 (2007-10-01), Tsai et al.
patent: 7664218 (2010-02-01), Tobita
patent: 2007/0297559 (2007-12-01), Cho et al.

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