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  4. Design of the high speed, high accuracy and low power current comparators

Design of the high speed, high accuracy and low power current comparators

Files

200811040.pdf (1.78 MB)

Date

2010

Authors

Chasta, Neeraj Kumar

Journal Title

Journal ISSN

Volume Title

Publisher

Dhirubhai Ambani Institute of Information and Communication Technology

Abstract

Comparators are non linear, decision making analog circuits, which find wide spread application in data converters, data transmission and others. Comparison can be done in terms of “Voltage” or “Current”. A current comparator can be referred as trans-impedance amplifiers which compares applied input currents and generate CMOS compatible output voltage. In this work, study and simulations of various current domain comparator circuits have been done; some of these follow basic analog circuit concepts like current mirroring and Voltage current feedback. This thesis presents a novel idea for analog current comparison with controlled hysteresis. Proposed circuit is based on current mirror and latching techniques. Comparator presented is designed optimally in 0.18μm CMOS process in LTspice environment. Designing issues have also been discussed for no hysteresis (or very less hysteresis) case, where comparator gives higher accuracy and speed at the cost of increased power consumption. In addition to this a simple circuit is proposed which satisfies high speed, high accuracy and low power consumption constraints for the mentioned technology parameters. It utilizes amplification properties of Common gate circuit for generating CMOS compatible output voltage by comparison of applied input signal current and reference current

Description

Keywords

CMOS Comparators, Comparator circuits, Metal oxide semiconductors complementary, Operational amplifiers, Design and construction, Integrated circuits, Very large scale integration, Integrated circuits, Electronic circuit design

Citation

Chasta, Neeraj Kumar (2010). Design of the high speed, high accuracy and low power current comparators. Dhirubhai Ambani Institute of Information and Communication Technology, ix, 61 p. (Acc.No: T00272)

URI

http://ir.daiict.ac.in/handle/123456789/309

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