发明授权
US09503119B2 Common mode sampling mechanism for residue amplifier in switched current pipeline analog-to-digital converters 有权
开关电流管线模数转换器中残余放大器的共模采样机制

Common mode sampling mechanism for residue amplifier in switched current pipeline analog-to-digital converters
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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