High-PSRR low-power single supply OTA

被引：12

作者：

Sobhy, E. A. ^{[1
]}

Hoyos, S. ^{[1
]}

Sanchez-Sinencio, E. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Elect & Comp Engn, Analog & Mixed Signal Grp, College Stn, TX 77843 USA

来源：

ELECTRONICS LETTERS | 2010年 / 46卷 / 05期

关键词：

IMPROVEMENT TECHNIQUE; AMPLIFIERS;

D O I：

10.1049/el.2010.3455

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 CMOS single supply operational transconductance amplifier (OTA) is reported. It has high power supply rejection capabilities over the entire gain bandwidth. The OTA is fabricated using the AMI 0.5 mu m CMOS process. Measurements show power supply rejection ratio (PSRR) of 120 dB to 10 kHz. At 10 MHz, PSRR is 40 dB. The high performance PSRR is achieved using a high impedance current source and two noise reduction techniques. The OTA offers very low current consumption of 25 mu A from a 3.3 V supply. It is suitable for applications such as low drop out voltage regulators.

引用

页码：337 / U4855

页数：2

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