Shift register circuit

Details Shift register circuit Shift register circuit

2008-07-15

2008-07-15

Lam, Tuan T (Department: 2816)

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

Shift register

C377S068000

Reexamination Certificate

active

07400698

ABSTRACT:
A shift register circuit including a first shift register unit, a second shift register unit, a third shift register unit, and a fourth shift register unit connected in serial. The second shift register unit includes an output terminal, and a pull down system pulling the voltage of the output terminal of the second shift register unit according to a pull down signal. The fourth shift register unit includes a third switch and a fourth switch. The fourth switch has a control terminal electrically coupled to the second terminal of the third switch and the pull down unit. The fourth shift register unit generates the pull down signal according to the voltage level of the connecting point between the third switch and the fourth switch.

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patent: 5859630 (1999-01-01), Huq
patent: 7317780 (2008-01-01), Lin et al.
patent: 2005/0212746 (2005-09-01), Iwasaki et al.
patent: 2006/0145998 (2006-07-01), Cho et al.
patent: 2006/0227093 (2006-10-01), Jang et al.
patent: 2007/0086558 (2007-04-01), Wei et al.

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