发明名称 |
D/A conversion circuit having n switches, n capacitors and a coupling capacitor |
摘要 |
A D/A conversion circuit is described which comprises a n switching, n capacitors and a coupling circuit. Upper n bit of the digital signal control n switches respectively and control charging and discharging of electric charge into the n capacitors, and the n capacitors are connected to the output line in an upper bit writing period. Lower n bit of the digital signal control the n switches and control charging and discharging of electric charge into the n capacitors, and the capacitors are connected to the output line through the coupling capacitor in a lower bit writing period.
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申请公布号 |
US6486812(B1) |
申请公布日期 |
2002.11.26 |
申请号 |
US20000633008 |
申请日期 |
2000.08.04 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
TANAKA YUKIO |
分类号 |
H03M1/68;H03M1/80;(IPC1-7):H63M1/66 |
主分类号 |
H03M1/68 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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