A noble track-and-hold amplifier with 10-b 120-MS/s

A novel track-and-hold (T&H) employing an operational transconductance amplifier (OTA) with two cross-coupled differential pairs (CCDPs) is proposed for high-accuracy and high-frequency applications. The T&H has a simple architecture requiring smaller capacitors and fewer switches and offers...

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Bibliographic Details
Published in:International journal of electronics 2010-07, Vol.97 (7), p.729-736
Main Author: Seon, J. K.
Format: Article
Language:English
Subjects:
Accuracy
Amplifiers
Capacitors
CMOS
cross-coupled differential pairs
Distortion
Electronics
Energy dissipation
Frequencies
operational transconductance amplifier
Power dissipation
Receivers & amplifiers
Sampling
Switches
track-and-hold
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Description
Summary:A novel track-and-hold (T&H) employing an operational transconductance amplifier (OTA) with two cross-coupled differential pairs (CCDPs) is proposed for high-accuracy and high-frequency applications. The T&H has a simple architecture requiring smaller capacitors and fewer switches and offers higher speed, lower distortion and lower power dissipation than its op-amp-based counterparts. The chip implemented in 0.18 μm CMOS process operates from a single 1.8 V supply and achieves more than 10-bits precision for sampling rate in excess of 120 MS/s.
ISSN:0020-7217
1362-3060
DOI:10.1080/00207211003697798