Shigenobu Kimura

US Patent:

20150349795, Dec 3, 2015

Filed:

May 18, 2015

Appl. No.:

14/714602

Inventors:

- Dallas TX, US
Manar EL-CHAMMAS - Dallas TX, US
Xiaopeng LI - Plano TX, US
Shigenobu KIMURA - Dallas TX, US

International Classification:

H03M 1/12
H03F 3/45

Abstract:

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.