Development of Analog Front-end for Capacitive ECG Signal Acquisition

2021 ◽  
Author(s):  
Dimiter H. Badarov ◽  
Georgy S. Mihov ◽  
Ivo Ts. Iliev
Keyword(s):  
Signal Acquisition ◽  
Ecg Signal ◽  
Front End ◽  
Analog Front End

scholarly journals A 0.5 V 68 nW ECG Monitoring Analog Front-End for Arrhythmia Diagnosis

2018 ◽  
Vol 8 (3) ◽  
pp. 27 ◽  
Author(s):  
Avish Kosari ◽  
Jacob Breiholz ◽  
NingXi Liu ◽  
Benton Calhoun ◽  
David Wentzloff
Keyword(s):  
Low Power ◽  
Power Efficiency ◽  
Low Noise ◽  
Signal Acquisition ◽  
Cmos Process ◽  
Ecg Signal ◽  
Ecg Monitoring ◽  
Power Circuit ◽  
Front End ◽  
Analog Front End

This paper presents a power efficient analog front-end (AFE) for electrocardiogram (ECG) signal monitoring and arrhythmia diagnosis. The AFE uses low-noise and low-power circuit design methodologies and aggressive voltage scaling to satisfy both the low power consumption and low input-referred noise requirements of ECG signal acquisition systems. The AFE was realized with a three-stage fully differential AC-coupled amplifier, and it provides bio-signal acquisition with programmable gain and bandwidth. The AFE was implemented in a 130 nm CMOS process, and it has a measured tunable mid-band gain from 31 to 52 dB with tunable low-pass and high-pass corner frequencies. Under only 0.5 V supply voltage, it consumes 68 nW of power with an input-referred noise of 2.8 µVrms and a power efficiency factor (PEF) of 3.9, which makes it very suitable for energy-harvesting applications. The low-noise 68nW AFE was also integrated on a self-powered physiological monitoring System on Chip (SoC) that is used to capture ECG bio-signals. Heart rate extraction (R-R) detection algorithms were implemented and utilized to analyze the ECG data received by the AFE, showing the feasibility of <100 nW AFE for continuous ECG monitoring applications.

scholarly journals EMI Susceptibility Issue in Analog Front-End for Sensor Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Anna Richelli
Keyword(s):  
Analog Circuits ◽  
Crucial Role ◽  
Signal Acquisition ◽  
Sensor Signal ◽  
Sensory Signals ◽  
Sensor Applications ◽  
Front End ◽  
Analog Front End ◽  
Integrated Analog Circuits

The susceptibility to electromagnetic interferences of the analog circuits used in the sensor readout front-end is discussed. Analog circuits still play indeed a crucial role in sensor signal acquisition due to the analog nature of sensory signals. The effect of electromagnetic interferences has been simulated and measured in many commercial and integrated analog circuits; the main cause of the electromagnetic susceptibility is investigated and the guidelines to design high EMI immunity circuits are provided.

scholarly journals CMRR Boosted Instrumentation Amplifier for Biomedical Application

2013 ◽  
Vol 2 (04) ◽  
pp. 01-06
Author(s):  
Ms. Amruta Bijwar
Keyword(s):  
Biomedical Application ◽  
Research Paper ◽  
Instrumentation Amplifier ◽  
Signal Acquisition ◽  
Biomedical Signal ◽  
Front End ◽  
Analog Front End ◽  
Theoretical Results

This research paper discusses about a design of an amplifier for its use in an Analog Front End for Biomedical signal acquisition. The design of an AFE is also specific to the signal of interest. This paper deals with the design of an Analog Front End using 180nm process. An amplifier is a key component of an AFE. For instrumentation amplifier to satisfy theoretical results the OPAMP used must be close to ideal. The simulations are performed using TANNER EDA tool.

scholarly journals Fabricating a Portable ECG Device Using AD823X Analog Front-End Microchips and Open-Source Development Validation

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5962
Author(s):  
Miguel Bravo-Zanoguera ◽  
Daniel Cuevas-González ◽  
Marco A. Reyna ◽  
Juan P. García-Vázquez ◽  
Roberto L. Avitia
Keyword(s):  
Open Source ◽  
Circuit Board ◽  
System Stability ◽  
Electrical Safety ◽  
Ecg Signal ◽  
Data Logging ◽  
Data Logger ◽  
Front End ◽  
Analog Front End ◽  
Open Source Development

Relevant to mobile health, the design of a portable electrocardiograph (ECG) device using AD823X microchips as the analog front-end is presented. Starting with the evaluation board of the chip, open-source hardware and software components were integrated into a breadboard prototype. This required modifying the microchip with the breadboard-friendly Arduino Nano board in addition to a data logger and a Bluetooth breakout board. The digitized ECG signal can be transmitted by serial cable, via Bluetooth to a PC, or to an Android smartphone system for visualization. The data logging shield provides gigabytes of storage, as the signal is recorded to a microSD card adapter. A menu incorporates the device’s several operating modes. Simulation and testing assessed the system stability and performance parameters in terms of not losing any sample data throughout the length of the recording and finding the maximum sampling frequency; and validation determined and resolved problems that arose in open-source development. Ultimately, a custom printed circuit board was produced requiring advanced manufacturing options of 2.5 mils trace widths for the small package components. The fabricated device did not degrade the AD823X noise performance, and an ECG waveform with negligible distortion was obtained. The maximum number of samples/second was 2380 Hz in serial cable transmission, whereas in microSD recording mode, a continuous ECG signal for up to 36 h at 500 Hz was verified. A low-cost, high-quality portable ECG for long-term monitoring prototype that reasonably complies with electrical safety regulations and medical equipment design was realized.

scholarly journals A Low Power Front End Analog Multiplexing Unit for 12 Lead ECG Signal Acquisition

2014 ◽  
Vol 5 (3) ◽  
pp. 59-72
Author(s):  
Hari Priya D ◽  
Rama Krishna P ◽  
Sastry A.S.C.S ◽  
Rao K.S
Keyword(s):  
Low Power ◽  
Signal Acquisition ◽  
Ecg Signal ◽  
Front End
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