High current efficiency class-AB OTA with high open loop gain and enhanced bandwidth

被引：11

作者：

Pourashraf, Shirin ^{[1
,2
]}

Ramirez-Angulo, Jaime ^{[1
,2
]}

Roman-Loera, Alejandro ^{[3
]}

Lopez-Martin, Antonio J. ^{[4
]}

Diaz-Sanchez, Alejandro ^{[5
]}

Carvajal, Ramon G. ^{[6
]}

机构：

[1] New Mexico State Univ, Klipsch Sch Elect, Las Cruces, NM 88003 USA

[2] New Mexico State Univ, Dept Comp Sci, Las Cruces, NM 88003 USA

[3] Autonomous Univ Aguascalientes, Aguascalientes, Mexico

[4] Univ Publ Navarra, Dept Elect & Elect Engn, Campus Arrosadia, E-31006 Pamplona, Spain

[5] Inst Nacl Astrofis, Opt Elect, Puebla, Mexico

[6] Univ Seville, Dept Elect Engn, Seville, Spain

来源：

IEICE ELECTRONICS EXPRESS | 2017年 / 14卷 / 17期

关键词：

class-AB; OTA; current efficiency; SLEW RATE; AMPLIFIER; CIRCUITS; STAGE;

D O I：

10.1587/elex.14.20170719

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：

An efficient class-AB OTA with enhanced output current, slew rate, open loop gain, and gain bandwidth is presented. The circuit is based on a class-AB input stage with adaptive biasing, and an output stage with dynamically biased cascode transistors. It can deliver output currents 100 times larger than the bias current with a total quiescent power dissipation of 72 mu W. Measurement results of a 180 nm CMOS test chip prototype show slew rate, gain bandwidth, and open loop gain enhancement.

引用

页数：5

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