Shift register and driving method thereof

Details Shift register and driving method thereof Shift register and driving method thereof

2005-03-22

2005-03-22

Wambach, Margaret (Department: 2816)

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

Shift register

Particular transfer means

C377S079000, C377S081000, C345S099000, C345S100000

Reexamination Certificate

active

06870895

ABSTRACT:
A low power consumption shift register which inputs a CK signal with a low voltage with almost no effect of variation in characteristics of transistors. In the invention, an input portion of an inverter is set at a threshold voltage thereof and a CK signal is inputted to the input portion of the inverter through a capacitor means. In this manner, the CK signal is amplified, which is sent to the shift register. That is, by obtaining the threshold potential of the inverter, the shift register which operates with almost no effect of variation in characteristics of transistors can be provided. A level shifter of the CK signal is generated from an output pulse of the shift register, therefore, the low power consumption shift register having the level shifter which flows a shoot-through current for a short period can be provided.

REFERENCES:
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patent: 6809706 (2004-10-01), Shimoda
patent: 20020036625 (2002-03-01), Nakamura
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patent: 20030174115 (2003-09-01), Washio et al.
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International Search Report (Application No. PCT/JP03/16028), Apr. 13, 2004 (In Japanese), 5 pages.
International Preliminary Examination Report (Application No. PCT/JP03/16028), Apr. 30, 2004, Partial Translation, 4 pages.

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