A Switched-Capacitor Amplifier With True Rail-to-Rail Input Range Without Using a Rail-to-Rail Op-amp

被引：1
|
作者：
Gopinath, Anjali [1 ]
Adusumalli, Ravi Kumar [1 ]
Vulligaddala, Veeresh Babu [1 ]
Srinivas, M. B. [2 ]
机构：
[1] Ams Semicond India Pvt Ltd, Hyderabad, Andhra Prades, India
[2] BITS Pilani, Dept Elect Engn, Hyderabad Campus, Hyderabad, Telangana, India
来源：
2017 30TH INTERNATIONAL CONFERENCE ON VLSI DESIGN AND 2017 16TH INTERNATIONAL CONFERENCE ON EMBEDDED SYSTEMS (VLSID 2017) | 2017年
关键词：
Switched-capacitor; operational amplifier; common-mode; linearity; gain-compensated; IMPERFECTIONS;
D O I：
10.1109/VLSID.2017.31
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper proposes an alternate switched-capacitor amplifier capable of handling rail-to-rail input common-mode voltage without using a rail-to-rail op-amp. Unlike most existing switched-capacitor architectures, the proposed alternate architecture holds the op-amp input terminals at a fixed voltage level in both the sample and hold phases irrespective of the input signal common-mode voltage. Designed and simulated in AMS 0.35um CMOS process, the implemented architecture, operating on 5V, can handle inputs with common-mode voltage varying from 0.1V to 4.9V while maintaining the op-amp common-mode voltage at 2.5V. Therefore, this architecture significantly relaxes the op-amp design and achieves more than 16-bit linearity over the rail-to-rail input common-mode voltage range.
引用
收藏
页码：329 / 334
页数：6
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