A 1.8V pseudo-differential switched-capacitor amplifier

被引：1
|
作者：
Gunay, ZS [1 ]
Soenen, EG [1 ]
Embabi, S [1 ]
Sanchez-Sinencio, E [1 ]
机构：
[1] Maxim Integrated Prod, Sunnyvale, CA 90034 USA
来源：
IEEE 1998 CUSTOM INTEGRATED CIRCUITS CONFERENCE - PROCEEDINGS | 1998年
关键词：
D O I：
10.1109/CICC.1998.695002
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A switched-capacitor amplifier (SCA), for a 1.8V, 10 bit, 2.5Ms/sec data converter has been developed. For the SCA to settle within 0.05% at 2.5Ms/sec rate, a pseudodifferential core amplifier, consisting of two fully cascoded amplifiers with gain-enhancement is proposed. A switching scheme is used for offset cancellation and, simultaneously, for the capacitive level shifting needed to bias the gain-enhancement amplifiers. The core amplifier offers 100dB gain, more than 100MHz unity-gain frequency with 1.8V supply. The SCA sinks 1.25mA at 1.8V and has a closed loop gain of 2. It was fabricated in a 1.2 mu m CMOS process. Functionality and performance were verified.
引用
收藏
页码：373 / 376
页数：4
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