A Low-Distortion Switched-Source-Follower Track-and-Hold Circuit

被引：0
|
作者：
Moriyama, Akinori [1 ]
Taniyama, Satoshi [1 ]
Waho, Takao [1 ]
机构：
[1] Sophia Univ, Dept Informat & Commun Sci, Chiyoda Ku, 7-1 Kioicho, Tokyo 1028554, Japan
来源：
2012 19th IEEE International Conference on Electronics, Circuits and Systems (ICECS) | 2012年
关键词：
TECHNOLOGY; AMPLIFIER; CMOS;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel switched-source-follower track-and-hold (T/H) circuit has been proposed, where an input source-coupled pair conventionally used preceding the source-follower switch is replaced with another source-follower stage. Suppressing signal-dependent sample-timing jitter, which is due to the channel-length modulation of the input transistor, leads to a low-distortion T/H operation. Circuit simulation assuming a 0.1-mu m InP-based HEMT technology has revealed an SFDR improvement from 58dB to 70dB for input and sampling frequencies of 3 GHz and 20 GHz, respectively. Although the present result is based on the high-speed compound semiconductor technology, the idea behind this can be applied to T/H circuits using nano-scale MOSFETs with reduced output impedance.
引用
收藏
页码：105 / 108
页数：4
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