Title :
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
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;
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
DOI :
10.1109/ICSICT.2014.7021591
