A Micropower CMOS-Instrumentation Amplifier

Degrauwe, M.; Vittoz, E.A.; Verbauwhede, Ingrid

doi:10.1109/jssc.1985.1052386

Cited by 110 publications

(32 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also called Ping-Pong auto-zeroing when two nulling paths are used in alternance, this method is well-suited for continuous-time circuits. Sometimes used alone is the past [9], it is nowadays often combined with chopper modulation techniques [7], [10], [11].…”

Section: Offset and Flicker Noise Reductionmentioning

confidence: 99%

Design and Noise Analysis of a Novel Auto-Zeroing Structure for Continuous-Time Instrumentation Amplifiers

Maréchal¹,

Nys²,

Krummenacher³

et al. 2013

International Journal of Electronics and Telecommunications

View full text Add to dashboard Cite

Abstract-This paper introduces a low-noise, low-power amplifier for high-impedance sensors. An innovative circuit using an auto-zeroed architecture combined with frequency modulation to reject offset and low-frequency noise is proposed and analysed. Special care was given to avoid broadband noise aliasing and chopping in the signal path, and to minimize both the resulting equivalent input offset voltage and equivalent input biasing current. The theoretical noise analysis of the proposed topology covers most of the noise sources of the circuit. Simulations show that the input-referred noise level of the circuit is 13.4nV / √ Hz for a power consumption of 85µA with a power supply from 1.8V to 3.6V.

show abstract

Section: Offset and Flicker Noise Reductionmentioning

confidence: 99%

Design and Noise Analysis of a Novel Auto-Zeroing Structure for Continuous-Time Instrumentation Amplifiers

Maréchal¹,

Nys²,

Krummenacher³

et al. 2013

International Journal of Electronics and Telecommunications

View full text Add to dashboard Cite

show abstract

“…However, the CMRR of the three-opamp IA depends on the matching of the resistors [12] and the need for low output impedance amplifiers results in excessive power dissipation. A second technique for implementing IAs is using switched-capacitor (SC) circuits [13], [14]. However, the main drawback of the SC amplifiers is the fold-over of noise above Nyquist frequency [15].…”

Section: Readout Front-end Architecture Overviewmentioning

confidence: 99%

A 60 $\mu$W 60 nV/$\surd$Hz Readout Front-End for Portable Biopotential Acquisition Systems

Yazıcıoğlu

Merken

Puers

et al. 2007

IEEE J. Solid-State Circuits

327

118

View full text Add to dashboard Cite

There is a growing demand for low-power, small-size and ambulatory biopotential acquisition systems. A crucial and important block of this acquisition system is the analog readout front-end. We have implemented a low-power and low-noise readout front-end with configurable characteristics for Electroencephalogram (EEG), Electrocardiogram (ECG), and Electromyogram (EMG) signals. Key to its performance is the new AC-coupled chopped instrumentation amplifier (ACCIA), which uses a low power current feedback instrumentation amplifier (IA). Thus, while chopping filters the 1/f noise of CMOS transistors and increases the CMRR, AC coupling is capable of rejecting differential electrode offset (DEO) up to 50 mV from conventional Ag/AgCl electrodes. The ACCIA achieves 120 dB CMRR and 57 nV/ Hz input-referred voltage noise density, while consuming 11.1 A from a 3 V supply. The chopping spike filter (CSF) stage filters the chopping spikes generated by the input chopper of ACCIA and the digitally controllable variable gain stage is used to set the gain and the bandwidth of the front-end. The front-end is implemented in a 0.5 m CMOS process. Total current consumption is 20 A from 3V.

show abstract

“…One advantage of CB technique is that it eliminates the errors introduced by non-matching of resistors (as in the conventional IA) to achieve high CMRR, and provides low output. Other methods include Switched-capacitor, Chopper-Modulation techniques [16][17][18]. Use of sigma-delta analog to digital converters (ADC) for direct ECG acquisition is reported [19].…”

Section: Introductionmentioning

confidence: 99%

Development of an embedded system and MATLAB-based GUI for online acquisition and analysis of ECG signal

2010

View full text Add to dashboard Cite

A Micropower CMOS-Instrumentation Amplifier

Cited by 110 publications

References 3 publications

Design and Noise Analysis of a Novel Auto-Zeroing Structure for Continuous-Time Instrumentation Amplifiers

Design and Noise Analysis of a Novel Auto-Zeroing Structure for Continuous-Time Instrumentation Amplifiers

A 60 $\mu$W 60 nV/$\surd$Hz Readout Front-End for Portable Biopotential Acquisition Systems

Development of an embedded system and MATLAB-based GUI for online acquisition and analysis of ECG signal

Contact Info

Product

Resources

About