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A Low-Power Reduced Kick-Back Comparator with Improved Calibration for High-Speed Flash ADCs

Guy TORFS, Zhisheng LI, Johan BAUWELINCK, Xin YIN, Jan VANDEWEGE, Geert Van Der PLAS

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Summary :

A novel low-power kick-back reduced comparator for use in high-speed flash analog-to-digital converters (ADC) is presented. The proposed comparator combines cascode transistors to reduce the kick-back noise with a built-in threshold voltage to remove the static power consumption of a reference. Without degrading other figures, the kick-back noise is reduced by a factor 8, compared to a previous design without cascode transistors. An improved calibration structure is also proposed to improve linearity when used in an ADC. Simulated in a standard CMOS technology the comparator consumes 106.5 µW at 1.8 V power supply and 1 GHz clock frequency.

Publication
IEICE TRANSACTIONS on Electronics Vol.E92-C No.10 pp.1328-1330
Publication Date
2009/10/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E92.C.1328
Type of Manuscript
LETTER
Category
Electronic Components

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