发明名称 |
Correction of operational amplifier gain error in pipelined analog to digital converters |
摘要 |
A pipeline analog to digital converter that includes a main pipeline including a plurality of analog to digital converter stages and a shadow pipeline for compensating the output of the main pipeline. Each of the analog to digital converter stages in the main pipeline provides a digital output and an analog residue signal. The shadow pipeline includes one or more stages that receive at least one gain error signal from one of the analog to digital converter stages in the main pipeline. The shadow pipeline is configured and arranged to processes the gain error signal to form a compensation signal. The compensation signal is combined with the analog residue signal to provide a compensated residue signal in which the finite error gain has been substantially removed. Alternatively, the compensation signal may be converted into a digital format and combined with the digital output bits of one or more of the analog to digital converter stages in the main pipeline to provide a compensated digital output that has had substantially all of the gain error removed therefrom.
|
申请公布号 |
US6501400(B2) |
申请公布日期 |
2002.12.31 |
申请号 |
US20010847612 |
申请日期 |
2001.05.02 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
ALI AHMED |
分类号 |
H01L21/822;H01L21/82;H01L27/04;H03K19/173;H03M1/06;H03M1/16;H03M1/44;H03M9/00;(IPC1-7):H03M1/06 |
主分类号 |
H01L21/822 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|