发明名称 |
ADC linearity improvement |
摘要 |
A method and circuit for improving linearity of a folding or flash analog-digital-converter (ADC) circuit. Averaging resistors connect outputs of each of a bank of first pre-amplifiers. A series adjustment resistor is placed between each node connecting the output of a first bank pre-amplifier and the associated averaging resistor, and the input of each of a second bank pre-amplifier. An adjustment current is injected through the adjustment resistor during a calibration. A permanent value for adjustment current is determined such that an effect of offset errors is substantially minimized.
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申请公布号 |
US6847320(B1) |
申请公布日期 |
2005.01.25 |
申请号 |
US20040816235 |
申请日期 |
2004.03.30 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
TAFT ROBERT C.;MENKUS CHRISTOPHER A. |
分类号 |
H03M1/12;(IPC1-7):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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