发明授权
- 专利标题: D/A conversion circuit and semiconductor device
- 专利标题(中): D / A转换电路和半导体器件
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申请号: US10810573申请日: 2004-03-29
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公开(公告)号: US06911926B2公开(公告)日: 2005-06-28
- 发明人: Jun Koyama , Mitsuaki Osame , Yukio Tanaka , Munehiro Azami , Naoko Yano , Shou Nagao
- 申请人: Jun Koyama , Mitsuaki Osame , Yukio Tanaka , Munehiro Azami , Naoko Yano , Shou Nagao
- 申请人地址: JP Kanagawa-ken
- 专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人: Semiconductor Energy Laboratory Co., Ltd.
- 当前专利权人地址: JP Kanagawa-ken
- 代理机构: Robinson Intellectual Propert Law Office, P.C.
- 代理商 Eric J. Robinson
- 优先权: JP09-344351 19971127; JP09-365054 19971219; JP10-146592 19980512
- 主分类号: G09G3/36
- IPC分类号: G09G3/36 ; H01L21/77 ; H01L21/84 ; H01L27/12 ; H01L29/04 ; H03K17/687 ; H03K17/693 ; H03M1/66 ; H03M1/68 ; H03M1/76 ; H03M1/00
摘要:
A D/A conversion circuit with a small area is provided. In the D/A conversion circuit, according to a digital signal transmitted from address lines of an address decoder, one of four gradation voltage lines is selected. A circuit including two N-channel TFTs is connected in series to a circuit including two P-channel TFT, and a circuit including the circuits connected in series to each other is connected in parallel to each of the gradation voltage lines. Further, an arrangement of the circuit including the two N-channel TFTs and the circuit including the two P-channel TFTs is reversed for every gradation voltage line. By this, the crossings of wiring lines in the D/A conversion circuit becomes small and the area can be made small.
公开/授权文献
- US20040178978A1 D/A conversion circuit and semiconductor device 公开/授权日:2004-09-16