发明名称 |
CHARGE COMPENSATION CALIBRATION FOR HIGH RESOLUTION DATA CONVERTER |
摘要 |
A calibrating Analog-to-Digital Converter (ADC) has an X-side array with binary-weighted capacitors that connect to an X-side line and a Y-side array connected to a Y-side line. Each array has binary-weighted capacitors from a most-significant-bit (MSB) to a least-significant-bit (LSB), but the LSB capacitor is duplicated as a termination capacitor and a middle capacitor between upper and lower groups is also duplicated as a surrogate capacitor. During calibration, lower array capacitors are switched low while the upper capacitors are driven by a thermometer-code value on both X and Y arrays. The thermometer value is inverted to the X-array but remains uninverted on the Y array. The lower array bits are tested to final a calibration value that has X and Y side voltages balanced.
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申请公布号 |
US2013076546(A1) |
申请公布日期 |
2013.03.28 |
申请号 |
US201113247119 |
申请日期 |
2011.09.28 |
申请人 |
WAN KAM CHUEN;WONG YAT TO (WILLIAM);WAN HO MING (KAREN);CHAN KWAI CHI;HONG KONG APPLIED SCIENCE & TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITED |
发明人 |
WAN KAM CHUEN;WONG YAT TO (WILLIAM);WAN HO MING (KAREN);CHAN KWAI CHI |
分类号 |
H03M1/10 |
主分类号 |
H03M1/10 |
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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