Design of a low-power multistage amplifier with large bandwidth using impedance adapting compensation technique

Author

Gengyu Zhang ; Xia Xiao

Author_Institution

Sch. of Electron. & Inf. Eng., Tianjin Univ., Tianjin, China

fYear

2014

fDate

28-31 Oct. 2014

Firstpage

1

Lastpage

3

Abstract

To achieve a higher gain and a larger bandwidth for low-voltage low-power circuit applications, a low-power three-stage amplifier has been designed using the impedance adapting compensation technique in this paper. A negative feedback path and a serial RC impedance stage are used to improve the stability. Simulations are realized by Cadence Spectre in Silterra 0.18 μm CMOS process. Results show that when driving a 150 pF capacitive load, the amplifier achieves a gain-bandwidth product of 6.28 MHz, the slew rate of 1.9 V/ μs only consuming 0.045 mW. It has a DC gain of 110 dB and the phase margin of 54.4 degree.

Keywords

CMOS analogue integrated circuits; RC circuits; compensation; feedback amplifiers; integrated circuit design; low-power electronics; radiofrequency amplifiers; radiofrequency integrated circuits; Cadence Spectre; Silterra CMOS process; bandwidth 6.28 MHz; capacitance 150 pF; gain 110 dB; impedance adapting compensation technique; low-power multistage amplifier; low-power three-stage amplifier; low-voltage low-power circuit application; negative feedback path; power 0.045 mW; serial RC impedance stage; size 0.18 mum; Capacitance; Capacitors; Educational institutions; Feedforward neural networks; Gain; Impedance; Stability analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on

Conference_Location

Guilin

Print_ISBN

978-1-4799-3296-2

Type

conf

DOI

10.1109/ICSICT.2014.7021591

Filename

7021591