Pulse signal output circuit and shift register

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United States of America Patent

PATENT NO 8442183
APP PUB NO 20110216876A1
SERIAL NO

13036140

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An object is to provide a pulse signal output circuit capable of operating stably and a shift register including the pulse signal output circuit. A pulse signal output circuit according to one embodiment of the disclosed invention includes first to tenth transistors. The ratio W/L of the channel width W to the channel length L of the first transistor and W/L of the third transistor are each larger than W/L of the sixth transistor. W/L of the fifth transistor is larger than W/L of the sixth transistor. W/L of the fifth transistor is equal to W/L of the seventh transistor. W/L of the third transistor is larger than W/L of the fourth transistor. With such a structure, a pulse signal output circuit capable of operating stably and a shift register including the pulse signal output circuit can be provided.

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Patent Owner(s)

Patent OwnerAddress
SEMICONDUCTOR ENERGY LABORATORY CO LTDKANAGAWA KANAGAWA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Amano, Seiko Kanagawa, JP 26 267
Kusunoki, Koji Kanagawa, JP 246 1224
Miyake, Hiroyuki Kanagawa, JP 618 12888
Miyazaki, Aya Kanagawa, JP 35 442
Shishido, Hideaki Kanagawa, JP 172 2507
Toyotaka, Kouhei Kanagawa, JP 171 2143

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