发明名称 |
Low power bit switches and method for high-voltage input SAR ADC |
摘要 |
A switched capacitor circuit, which may be an SAR ADC, includes a plurality of bit switching circuits (33) each including a high-voltage sampling switch circuit (18) having a first terminal (28) coupled to a first terminal of a corresponding capacitor (22) and a second terminal coupled to receive an analog input signal (VSIG). A third terminal of the sampling switch circuit is coupled to an intermediate conductor (19). Each switching circuit (33) also includes a low-voltage conversion switch circuit (30) coupled to the intermediate conductor (19) and a combinational logic circuit (12) applying low-voltage signals to the conversion switch circuit and a level-shifting circuit (16) that generates corresponding high-voltage signals (HV_SIG_DRV) which control coupling of the first terminal (28) to the analog input signal and the intermediate conductor. |
申请公布号 |
US2012105265(A1) |
申请公布日期 |
2012.05.03 |
申请号 |
US20100925916 |
申请日期 |
2010.11.02 |
申请人 |
AGARWAL VINAY;SEYMOUR ROBERT E.;TEXAS INSTRUMENTS INC. |
发明人 |
AGARWAL VINAY;SEYMOUR ROBERT E. |
分类号 |
H03M1/12 |
主分类号 |
H03M1/12 |
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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