Invention Grant
- Patent Title: Semiconductor device
- Patent Title (中): 半导体器件
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Application No.: US12211187Application Date: 2008-09-16
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Publication No.: US07768329B2Publication Date: 2010-08-03
- Inventor: Hajime Kimura
- Applicant: Hajime Kimura
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Fish & Richardson P.C.
- Priority: JP2004-151722 20040521
- Main IPC: H03K3/00
- IPC: H03K3/00

Abstract:
A shift register capable of supplying only a necessary clock signal to a necessary unit register with simple constitution. A semiconductor device is provided with a shift register in which a plurality of stages of unit registers is connected, in which the unit register comprises a flip-flop circuit, a first switch and a second switch, a first clock signal line is electrically connected to the flip-flop circuit through the first switch, a second clock signal line is electrically connected to the flip-flop circuit through the second switch, the first switch is controlled to be on/off by an output signal from the flip-flop circuit, and the second switch is controlled to be on/off by an input signal to the flip-flop circuit.
Public/Granted literature
- US20090027370A1 Semiconductor Device Public/Granted day:2009-01-29
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