Shift register with pre-pull-down module to suppress a spike

Details Shift register with pre-pull-down module to suppress a spike Shift register with pre-pull-down module to suppress a spike

2011-05-31

2011-05-31

Lam, Tuan (Department: 2816)

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

Shift register

C377S069000, C377S079000

Reexamination Certificate

active

07953201

ABSTRACT:
A shift register includes a plurality of shift register stages cascade-connected with each other. Each shift register stage includes a pull up module for outputting an output pulse in response to a first clock signal, a pull-up driving module for turning on the pull up module in response to a driving pulse of a previous one stage of the shift register, a pre-pull-down module coupled to a previous two stage of the shift register and a first node for pulling down voltage level of the first node in response to a output pulse of the previous two stage of the shift register, a pull down module coupled to the first node for pulling down voltage level of the first node in response to a pulling-down triggering signal, and a pulling down driving module for providing the pulling-down triggering signal.

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