A High Slew Rate, Low Voltage CMOS Class-AB Amplifier

被引：0

作者：

Sivakumari, Kunchala ^{[1
]}

Srinivasulu, Avireni ^{[1
]}

Reddy, V. Venkata ^{[1
]}

机构：

[1] Vignan Univ, Dept ECE, VFSTR Univ, Guntur, Andhra Pradesh, India

来源：

2014 INTERNATIONAL CONFERENCE ON APPLIED ELECTRONICS (AE) | 2014年

关键词：

Analog integrated circuits; Class-AB amplifiers; slew rate; low volatge; OP-AMPS; COMPENSATION;

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 simple low voltage operational amplifier is introduced with an efficient class-AB output stage. Two biasing transistors are present in between common source stage. This amplifier is simulated in 0.18 mu m CMOS technology. The proposed class-AB amplifier is designed to operate from +/-500 mV supplies. The simulated phase margin of proposed class-AB amplifier is 87 degrees at the load of 10 k Omega parallel to 1 pF. The class-AB amplifier's total compensation capacitance is 5 pF, which is less than 50% of conventional amplifiers. The unity gain frequency of proposed class-AB amplifier is 21.17 MHz, when driving a resistive load from 10 k Omega to 500 k Omega and capacitive loads from 1 pF to 5 pF. The slew rates of modified amplifier are 7.5 V/mu s and 8.57 V/mu s. This modified amplifier greatly increases the slew rate compared to the conventional circuits.

引用

页码：267 / 270

页数：4

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