A Low-Power High-Input-Impedance ECG Readout System Employing A Very High-Gain Amplification and A Signal-Folding Technique for Dry-Electrode Recording

2021 ◽  
pp. 1-1
Author(s):  
Chanoknan Buaban ◽  
Chinnatip Ratametha ◽  
Tanachai Limpisawas ◽  
Techapon Songthawornpong ◽  
Bhirawich Pholpoke ◽  
...  
Keyword(s):  
Low Power ◽  
Input Impedance ◽  
High Gain ◽  
Readout System ◽  
High Input ◽  
High Input Impedance ◽  
Electrode Recording ◽  
Dry Electrode ◽  
Very High

A Low-Power High-Input-Impedance 70-dB Gain ECG Readout System with High Interference Tolerance

2018 ◽  
Author(s):  
Chinnatip Ratametha ◽  
Chanoknan Buaban ◽  
Bhirawich Pholpoke ◽  
Tanachai Limpisawas ◽  
Pakorn Prasopsin ◽  
...  
Keyword(s):  
Low Power ◽  
Input Impedance ◽  
Readout System ◽  
High Input ◽  
High Input Impedance

scholarly journals Low Noise, High Input Impedance Digital-Analog Hybrid Offset Suppression Amplifier for Wearable Dry Electrode ECG Monitoring

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 165 ◽  
Author(s):  
Weilin Xu ◽  
Taotao Wang ◽  
Xueming Wei ◽  
Hongwei Yue ◽  
Baolin Wei ◽  
...  
Keyword(s):  
Input Impedance ◽  
Electronic Device ◽  
Gain Control ◽  
Low Noise ◽  
Instrumentation Amplifier ◽  
High Input ◽  
High Input Impedance ◽  
Capacitively Coupled ◽  
Dry Electrode ◽  
Long Time

The portable real-time electrocardiogram (ECG) is a convenient and promising electronic device for cardiovascular diseases patients. However, unlike wet gel electrodes in traditional clinical applications, dry electrodes are competent for comfortable long-time wearing and can prevent skin ulceration. Its ultra-high source impedance and electrode offset (EOS) make traditional chopper amplifiers with low input impedance and limited EOS range difficult to apply to this area. To overcome these challenges, this paper proposes a novel chopper amplifier topology. This architecture includes a gain control loop, a ripple reduction loop, and a DC-servo loop (DSL). The proposed sampling input stage and digital-analog hybrid DSL are employed to boost input impedance and extend the EOS handing range. Designed with a 0.18 µm 1P6M 1.8 V CMOS salicide process, the proposed chopper capacitively coupled instrumentation amplifier achieves an ultra-high input impedance of 120 GΩ (<0.05 Hz) or 2.1 GΩ (0.6~250 Hz), an EOS handing range of ±325 mV and a low noise of 1.9 μVrms at 0.6~250 Hz. It occupies an area of 0.36 mm2 and only consumes a quiescent current of 11 μA.

LOW POWER CONTINUOUS TIME COMMON MODE SENSING FOR COMMON MODE FEEDBACK CIRCUITS

2010 ◽  
Vol 19 (03) ◽  
pp. 519-528 ◽  
Author(s):  
M. PRAMOD ◽  
T. LAXMINIDHI
Keyword(s):  
Continuous Time ◽  
Input Impedance ◽  
Cmos Process ◽  
High Input ◽  
High Input Impedance ◽  
Common Mode ◽  
Standby Power ◽  
Low Distortion ◽  
Simulation Results ◽  
Feedback Circuits

Continuous common mode feedback (CMFB) circuits having high input impedance and low distortion are proposed. The proposed circuits are characterized for 0.18 μm CMOS process with 1.8 V supply. Simulation results indicate that the proposed common mode detector consumes no standby power and CMFB circuit consumes 27–34% less power than previous high swing CMFB circuits.

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