Gain stabilization mechanism through dynamic common mode feedback and gain booster in Folded Cascode Track and Hold (THA) circuit

Author

Abas, M. Amir ; Asyraf, A.

Author_Institution

British Malaysian Inst, Univ. Kuala Lumpur, Gombak, Malaysia

fYear

2013

fDate

18-19 Sept. 2013

Firstpage

17

Lastpage

22

Abstract

A low power Folded Cascode Track and Hold Amplifier (THA) circuit has been designed and analysed. The design of THA is to facilitate the development of ADC with specification 12-bit resolution, 125kSPS, and 1MHz. THA is used to sample and hold the input signal before it is being digitized. Ideally, signal that passed through THA circuit should not degrade the quality. Therefore high gain factor is very important to maintain the virtual ground on THA circuit. A simulation analysis was carried out to explore the operation of three different types of Folded Cascode circuits with the aims to identify the best techniques for increasing gain, decreasing speed and good ICMR parameter. The simulation was carried out at gate level using CMOS 0.18μm mixed signal process technology.

Keywords

CMOS integrated circuits; amplifiers; analogue-digital conversion; low-power electronics; sample and hold circuits; ADC; CMOS; ICMR parameter; dynamic common mode feedback; folded cascode track-and-hold circuit; frequency 1 MHz; gain booster; gain stabilization mechanism; low power THA circuit; mixed signal process technology; size 0.18 micron; word length 12 bit; ADC-DAC; CMOS Mixed Signal; Low Power; Track and Hold; Transmission Gate-Level;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ICCAS), 2013 IEEE International Conference on

Conference_Location

Kuala Lumpur

Type

conf

DOI

10.1109/CircuitsAndSystems.2013.6671569

Filename

6671569