A Low-Power Class-AB Gm-Based Amplifier With Application to an 11-bit Pipelined ADC
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SCOPUS
- Title
- A Low-Power Class-AB Gm-Based Amplifier With Application to an 11-bit Pipelined ADC
- Authors
- Suh, Y; Choi, S; Sim, JY
- Date Issued
- 2016-07
- Publisher
- IEEE
- Abstract
- A Gm-based amplifier is proposed for the use in low-voltage and low-power switched-capacitor circuits. At the input stage of the amplifier, a common-mode current-suppression scheme effectively suppresses the common-mode current with the differential-mode current even amplified, resulting in decrease in dc power consumption. At the output stage of the amplifier, a self-biased cascode configuration adaptively changes bias voltages to achieve both the cascode operation for high gain and digital switching operation for fast transients. The proposed amplifier is applied to a design of an 11-bit pipelined ADC with a 0.13-mu m CMOS process. The implemented analog-to-digital converter consumes 80 mu W from a single 0.7 V supply at 2.5 MS/s. It achieves an effective number of bit of 9.72 bit without any calibration scheme and a figure of merit of 37.8 fJ/c-s at near Nyquist rate.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37140
- DOI
- 10.1109/TVLSI.2015.2504494
- ISSN
- 1063-8210
- Article Type
- Article
- Citation
- IEEE Transactions on Very Large Scale Integration (VLSI) Systems, vol. 24, no. 7, page. 2562 - 1569, 2016-07
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