Shift register with built-in level shifter

Details Shift register with built-in level shifter Shift register with built-in level shifter

2005-05-10

2005-05-10

Wambach, Margaret R. (Department: 2816)

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

Shift register

Compensating for or preventing signal deterioration

C377S075000, C377S079000, C345S099000, C345S100000

Reexamination Certificate

active

06891916

ABSTRACT:
A shift register having a built-in level shifter includes a buffer outputting a shift pulse using a first clock signal and a first supply voltage via voltages at first and second nodes; a first controller controlling the voltage of the first node via the start pulse and the second node; and a second controller controlling the second node voltage using the first and second supply voltage via the start pulse and the second clock signal. The level shifter includes a third controller forming a current path between third supply voltage input line and first supply voltage input line controlling a third node using the first supply voltage and a third supply voltage via the voltage of the second node and two of first to fourth clock signals; and an output part outputting the level-shifted shift pulse using the first and third supply voltage via the voltage at the third node.

REFERENCES:
patent: 5016263 (1991-05-01), Kitagawa et al.
patent: 6301323 (2001-10-01), Czechanowski
patent: 6483889 (2002-11-01), Kim et al.

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