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A 10-bit piplined A/D converter with split calibration and opamp-sharing technique

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3 Author(s)
Li-Han Hung ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Yen-Chuan Huang ; Tai-Cheng Lee

A digital calibration technique based on the split-ADC is proposed to correct linear gain errors in a 10-bit pipelined A/D converter, which allows the use of low-gain amplifiers in conversion stages. Fabricated in a 0.35-μm CMOS technology, the core area of the ADC occupies 1.64 mm2. The opamp-sharing technique helps to reduce the core power consumption to 45 mW from a 3-V supply voltage at 50 MS/s. The SNDR and the SFDR of the calibrated output exhibit 55.2 dB and 67.0 dB, respectively. The proposed calibration system converges in less than 5 × 105 cycles.

Published in:

VLSI Design Automation and Test (VLSI-DAT), 2010 International Symposium on

Date of Conference:

26-29 April 2010