A new CMOS current mode fast folding amplifier

Author

Al-Absi, Munir A. ; Dhar, Sagar K. ; Abuelma´atti, Muhammad T. ; Elhassan, Mohanad A. M.

Author_Institution

Dept. of Electr. Eng., King Fahd Univ. of Pet. & Miner., Dhahran, Saudi Arabia

fYear

2014

Firstpage

183

Lastpage

186

Abstract

Folding amplifiers are the key building blocks of folding flash analog to digital converters (ADC). Although, there are many folding amplifiers found in the literature, their transfer characteristics are either sinusoidal or triangular which causes digitization error and needs corrective measurements in folding-amplifier based ADCs. In this work, a new CMOS current-mode folding amplifier with saw-tooth transfer characteristics is proposed. The design is based on MOS operating in strong inversion. The functionality of the proposed circuit was confirmed using Tanner T-spice in TSMC 0.18μm technology. The worst case delay of the folding amplifier is found to be 25ns which is around 10 times faster than the most recent work found in the literature.

Keywords

CMOS integrated circuits; amplifiers; analogue-digital conversion; ADC; CMOS current-mode folding amplifier; TSMC technology; Tanner T-spice; digitization error; folding flash analog to digital converters; saw-tooth transfer characteristics; size 0.18 mum; time 25 ns; CMOS integrated circuits; Delays; Logic gates; Low voltage; Time factors; Transistors; current mode; folding ADC; folding amplifier; sawtooth folding amplifier; sawtooth generator;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on

Type

conf

DOI

10.1109/ICECS.2014.7049952

Filename

7049952