发明授权
- 专利标题: Common mode sampling mechanism for residue amplifier in switched current pipeline analog-to-digital converters
- 专利标题(中): 开关电流管线模数转换器中残余放大器的共模采样机制
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申请号: US14714602申请日: 2015-05-18
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公开(公告)号: US09503119B2公开(公告)日: 2016-11-22
- 发明人: Jesse Coulon , Manar El-Chammas , Xiaopeng Li , Shigenobu Kimura
- 申请人: TEXAS INSTRUMENTS INCORPORATED
- 申请人地址: US TX Dallas
- 专利权人: TEXAS INSTRUMENTS INCORPORATED
- 当前专利权人: TEXAS INSTRUMENTS INCORPORATED
- 当前专利权人地址: US TX Dallas
- 代理商 Gregory J. Albin; Frank D. Cimino
- 主分类号: H03M1/12
- IPC分类号: H03M1/12 ; H03M1/72 ; H03F3/45 ; H03M1/06 ; H03M1/16 ; H03M1/44
摘要:
A switched current pipeline analog-to-digital converter (ADC) integrated circuit. The integrated circuit comprises a track and hold circuit (T/H) and a residue amplifier. The T/H is configured to generate a differential output of the T/H based on an analog input. The residue amplifier is coupled to the T/H, configured to capture a sample of a common mode signal of the differential output of the T/H during a periodic pulse interval, wherein the pulse interval is less than half of the time duration of the period of the pulse, configured to generate a corrected input common mode feedback signal based in part on the sample of the common mode signal of the differential output of the T/H, and configured to generate a differential output of the residue amplifier based on the differential output of the T/H and based on the corrected input common mode feedback signal.
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