A new rail-to-rail ultra low voltage high speed comparator

Author

Akbari, Mohammad ; Maymandi-Nejad, Mohammad ; Mirbozorgi, S.A.

Author_Institution

Dept. of Electr. Eng., Ferdowsi Univ. of Mashhad, Mashhad, Iran

fYear

2013

fDate

14-16 May 2013

Firstpage

1

Lastpage

6

Abstract

This paper presents a new rail-to-rail input highperformance regenerative comparator suitable for low-voltage low-power applications, e.g. bio-implantable circuits. In this circuit the body of the PMOS transistor is used as comparator´s input. A technique is proposed to increase the speed of the circuit. The proposed comparator has a good performance in weak inversion (sub-threshold). Simulations are done in the 0.18-μm CMOS technology with a supply voltage of 0.5 V. The propagation delay time of the second proposed comparator is 16.4 ns, the power dissipation is 20 nW and the power delay product is 0.33 fJ in clock frequency of 5 MHz and input voltage of 500 μV. Also the supply voltage can be decreased to 0.3 V.

Keywords

CMOS integrated circuits; MOSFET; comparators (circuits); low-power electronics; CMOS technology; PMOS transistor; bio-implantable circuit; frequency 5 MHz; low-voltage low-power application; power 20 nW; rail-to-rail ultra low voltage high speed comparator; regenerative comparator; size 0.18 mum; time 16.4 ns; voltage 0.3 V; voltage 0.5 V; voltage 500 muV; Delays; Equations; Inverters; Latches; Mathematical model; Transient analysis; Transistors; Regenerative; body driven; comparator; rail-to-rail; weak inversion;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering (ICEE), 2013 21st Iranian Conference on

Conference_Location

Mashhad

Type

conf

DOI

10.1109/IranianCEE.2013.6599850

Filename

6599850