A 0.8-V 1.2-μW rail-to-rail fully differential OpAmp with adaptive biasing

M. R. Valero; S. Celma; N. Medrano; B. Calvo

doi:10.1109/ESSCIRC.2012.6341260

A 0.8-V 1.2-μW rail-to-rail fully differential OpAmp with adaptive biasing

M. R. Valero
, S. Celma
, N. Medrano
, B. Calvo

Department of Electronic & Electrical Engineering

University of Zaragoza

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

5 Citations (SciVal)

Abstract

This paper presents an ultra low-power rail-to-rail fully differential operational amplifier (OpAmp) fabricated in a standard 0.18 μm CMOS technology. The proposed circuit uses transistors biased in the sub-threshold region for low-voltage low-power operation. For a 0.8 V single supply and 8 pF loads, experimental measurements shows a 51 dB open loop gain, 62° phase margin, 57 kHz unity gain frequency and a 750 mV linear output swing. Adaptive biasing provides 0.14 V/μs slew-rate, while a 73 dB CMRR is achieved thanks to a CMFF circuit, demonstrating the correct functionality of the OpAmp with a power consumption of 1.2 μW.

Original language	English
Title of host publication	2012 Proceedings of the ESSCIRC (ESSCIRC)
Publisher	IEEE
Pages	77-80
Number of pages	4
DOIs	https://doi.org/10.1109/ESSCIRC.2012.6341260
Publication status	Published - 12 Nov 2012
Event	38th European Solid-State Circuit Conference - Bordeaux Convention Centre, Bordeaux, France Duration: 18 Sept 2012 → 20 Sept 2012

Conference

Conference	38th European Solid-State Circuit Conference
Abbreviated title	ESSCIRC 2012
Country/Territory	France
City	Bordeaux
Period	18/09/12 → 20/09/12

Keywords

CMOS analogue integrated circuits
differential amplifiers
low-power electronics
operational amplifiers
transistor circuits
CMFF circuit
CMOS technology
OpAmp
adaptive biasing
frequency 57 kHz
gain 51 dB
linear output swing
low-voltage low-power operation
power 1.2 muW
power consumption
size 0.18 mum
slew-rate
subthreshold region
transistor biasing
ultra low-power rail-to-rail fully differential operational amplifier
voltage 0.8 V
voltage 750 mV
CMOS integrated circuits
Gain
Operational amplifiers
Rail to rail inputs
Temperature measurement
Transistors
Voltage measurement

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10.1109/ESSCIRC.2012.6341260

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title = "A 0.8-V 1.2-μW rail-to-rail fully differential OpAmp with adaptive biasing",

abstract = "This paper presents an ultra low-power rail-to-rail fully differential operational amplifier (OpAmp) fabricated in a standard 0.18 μm CMOS technology. The proposed circuit uses transistors biased in the sub-threshold region for low-voltage low-power operation. For a 0.8 V single supply and 8 pF loads, experimental measurements shows a 51 dB open loop gain, 62° phase margin, 57 kHz unity gain frequency and a 750 mV linear output swing. Adaptive biasing provides 0.14 V/μs slew-rate, while a 73 dB CMRR is achieved thanks to a CMFF circuit, demonstrating the correct functionality of the OpAmp with a power consumption of 1.2 μW.",

keywords = "CMOS analogue integrated circuits, differential amplifiers, low-power electronics, operational amplifiers, transistor circuits, CMFF circuit, CMOS technology, OpAmp, adaptive biasing, frequency 57 kHz, gain 51 dB, linear output swing, low-voltage low-power operation, power 1.2 muW, power consumption, size 0.18 mum, slew-rate, subthreshold region, transistor biasing, ultra low-power rail-to-rail fully differential operational amplifier, voltage 0.8 V, voltage 750 mV, CMOS integrated circuits, Gain, Operational amplifiers, Rail to rail inputs, Temperature measurement, Transistors, Voltage measurement",

author = "Valero, \{M. R.\} and S. Celma and N. Medrano and B. Calvo",

year = "2012",

month = nov,

day = "12",

doi = "10.1109/ESSCIRC.2012.6341260",

language = "English",

pages = "77--80",

booktitle = "2012 Proceedings of the ESSCIRC (ESSCIRC)",

publisher = "IEEE",

address = "USA United States",

note = "38th European Solid-State Circuit Conference, ESSCIRC 2012 ; Conference date: 18-09-2012 Through 20-09-2012",

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TY - GEN

T1 - A 0.8-V 1.2-μW rail-to-rail fully differential OpAmp with adaptive biasing

AU - Valero, M. R.

AU - Celma, S.

AU - Medrano, N.

AU - Calvo, B.

PY - 2012/11/12

Y1 - 2012/11/12

N2 - This paper presents an ultra low-power rail-to-rail fully differential operational amplifier (OpAmp) fabricated in a standard 0.18 μm CMOS technology. The proposed circuit uses transistors biased in the sub-threshold region for low-voltage low-power operation. For a 0.8 V single supply and 8 pF loads, experimental measurements shows a 51 dB open loop gain, 62° phase margin, 57 kHz unity gain frequency and a 750 mV linear output swing. Adaptive biasing provides 0.14 V/μs slew-rate, while a 73 dB CMRR is achieved thanks to a CMFF circuit, demonstrating the correct functionality of the OpAmp with a power consumption of 1.2 μW.

AB - This paper presents an ultra low-power rail-to-rail fully differential operational amplifier (OpAmp) fabricated in a standard 0.18 μm CMOS technology. The proposed circuit uses transistors biased in the sub-threshold region for low-voltage low-power operation. For a 0.8 V single supply and 8 pF loads, experimental measurements shows a 51 dB open loop gain, 62° phase margin, 57 kHz unity gain frequency and a 750 mV linear output swing. Adaptive biasing provides 0.14 V/μs slew-rate, while a 73 dB CMRR is achieved thanks to a CMFF circuit, demonstrating the correct functionality of the OpAmp with a power consumption of 1.2 μW.

KW - CMOS analogue integrated circuits

KW - differential amplifiers

KW - low-power electronics

KW - operational amplifiers

KW - transistor circuits

KW - CMFF circuit

KW - CMOS technology

KW - OpAmp

KW - adaptive biasing

KW - frequency 57 kHz

KW - gain 51 dB

KW - linear output swing

KW - low-voltage low-power operation

KW - power 1.2 muW

KW - power consumption

KW - size 0.18 mum

KW - slew-rate

KW - subthreshold region

KW - transistor biasing

KW - ultra low-power rail-to-rail fully differential operational amplifier

KW - voltage 0.8 V

KW - voltage 750 mV

KW - CMOS integrated circuits

KW - Gain

KW - Operational amplifiers

KW - Rail to rail inputs

KW - Temperature measurement

KW - Transistors

KW - Voltage measurement

U2 - 10.1109/ESSCIRC.2012.6341260

DO - 10.1109/ESSCIRC.2012.6341260

M3 - Chapter in a published conference proceeding

SP - 77

EP - 80

BT - 2012 Proceedings of the ESSCIRC (ESSCIRC)

PB - IEEE

T2 - 38th European Solid-State Circuit Conference

Y2 - 18 September 2012 through 20 September 2012

ER -

A 0.8-V 1.2-μW rail-to-rail fully differential OpAmp with adaptive biasing

Abstract

Conference

Keywords

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