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

页码：105 / 108

页数：4

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