Comparative study on multistage amplifier and folded cascode amplifier design in sample and hold circuit using 0.18μm CMOS technology

Author

Hassan, Siti Lailatul Mohd ; Halim, Ili Shairah Abd ; Rahim, A´zraa Afhzan Abd ; Aziz, N.B.A. ; Yaakub, Tuan Norjihan Tuan

Author_Institution

Fac. of Electr. Eng., Univ. Teknol. MARA, Shah Alam, Malaysia

fYear

2012

Firstpage

29

Lastpage

34

Abstract

This paper presents the comparison between multistage amplifier and folded cascode amplifier design using 0.18μm CMOS technology. The objective of this project is to compare gain and power dissipation between these two design models. Sample and hold circuit (SHC) is the main component in pipelined ADC. Designing a low power, high gain SHC is crucial, that is the main reason why multistage amplifier is applied in this project. Implementation has been done in 0.18μm technology, for a 5MHz sampling frequency, considering 1.2 Vpp voltage and 1.8V voltage supply using SILVACO EDA tools. From the simulation, the multistage amplifier consumes 0.139mW power and has gain of 94.64dB. The folded cascode amplifier has 6.5mW power dissipation and 70dB gain. From the simulation results, the multistage amplifier is better in term of gain and power dissipation than the folded cascode design.

Keywords

CMOS analogue integrated circuits; amplifiers; analogue-digital conversion; integrated circuit design; pipeline processing; power supplies to apparatus; sample and hold circuits; ADC; CMOS technology; SILVACO EDA tools; design models; folded cascode amplifier; folded cascode amplifier design; gain dissipation; high gain SHC; multistage amplifier; power 0.139 mW; power 6.5 mW; power dissipation; sample and hold circuit; sampling frequency; size 0.18 mum; voltage 1.2 V; voltage 1.8 V; voltage supply; CMOS integrated circuits; Capacitors; Clocks; Power demand; Simulation; Switches; Transistors; ADC; Multistage amplifier; folded cascode amplifier; low power consumption; sample and hold circuit;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Applications and Industrial Electronics (ISCAIE), 2012 IEEE Symposium on

Conference_Location

Kota Kinabalu

Print_ISBN

978-1-4673-3032-9

Type

conf

DOI

10.1109/ISCAIE.2012.6482062

Filename

6482062