A high CMRR analog front-end IC for wearable physiological monitoring

Kumar, Dr.S.Sasi; Safeer, Kadavath Peedikayil; Pandian, P. S.; Padaki, V. C.; Kumar, D. Shravan; Kumar, M. Madhava; Sastry, Ch. V. S. H. S. R.

doi:10.1109/indcon.2012.6420648

Cited by 7 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Guard electrode. As shown in figure 2, the classical approach used to solve the aforementioned issue is to add a so-called 'guard electrode' (or 'right-leg electrode') connected to the back electrical connection (Thakor 2000, Kumar et al 2012. Any disturbance current injected in the conductors of the circuit that are not marked in dashed red will flow across the skin impedance beneath the guard electrode.…”

Section: Introductionmentioning

confidence: 99%

Cooperative dry-electrode sensors for multi-lead biopotential and bioimpedance monitoring

Rapin¹,

Proença²,

Braun³

et al. 2015

Physiol. Meas.

View full text Add to dashboard Cite

Cooperative sensors is a novel measurement architecture that allows the acquiring of biopotential signals on patients in a comfortable and easy-to-integrate manner. The novel sensors are defined as cooperative in the sense that at least two of them work in concert to measure a target physiological signal, such as a multi-lead electrocardiogram or a thoracic bioimpedance.This paper starts by analysing the state-of-the-art methods to simultaneously measure biopotential and bioimpedance signals, and justifies why currently (1) passive electrodes require the use of shielded or double-shielded cables, and (2) active electrodes require the use of multi-wired cabled technologies, when aiming at high quality physiological measurements.In order to overcome the limitations of the state-of-the-art, a new method for biopotential and bioimpedance measurement using the cooperative sensor is then presented. The novel architecture allows the acquisition of the aforementioned biosignals without the need of shielded or multi-wire cables by splitting the electronics into separate electronic sensors comprising each of two electrodes, one for voltage measurement and one for current injection. The sensors are directly in contact with the skin and connected together by only one unshielded wire. This new configuration requires one power supply per sensor and all sensors need to be synchronized together to allow them to work in concert.After presenting the working principle of the cooperative sensor architecture, this paper reports first experimental results on the use of the technology when applied to measuring multi-lead ECG signals on patients. Measurements performed on a healthy patient demonstrate the feasibility of using this novel cooperative sensor architecture to measure biopotential signals and compliance with common mode rejection specification accordingly to international standard (IEC 60601-2-47) has also been assessed.By reducing the need of using complex wiring setups, and by eliminating the presence of central recording devices (cooperative sensors directly sense and store the measured biosignals on the site), the depicted novel technology is a candidate to a novel generation of highly-integrated, comfortable and reliable technologies that measure physiological signals in real-life scenarios.

show abstract

Section: Introductionmentioning

confidence: 99%

Cooperative dry-electrode sensors for multi-lead biopotential and bioimpedance monitoring

Rapin¹,

Proença²,

Braun³

et al. 2015

Physiol. Meas.

View full text Add to dashboard Cite

show abstract

“…In recent times, wearable or portable health monitoring technology is becoming a hot commodity [1], [2], which motivated mainly by increasing requirement for healthcare and by the fact that the attention and investment on smart healthy electronics is growing.…”

Section: Introductionmentioning

confidence: 99%

A CMOS physiological monitoring frontend for wearable health applications

Wang

Zhang

Han

et al. 2014

2014 International Conference on Multisensor Fusion and Information Integration for Intelligent Systems (MFI)

View full text Add to dashboard Cite

A prototype CMOS physiological monitoring frontend for wearable or portable health system is presented. It consists of three main modules for electrocardiography (ECG) recording, bioelectrical impedance (BI) measurement and body temperature (BT) measurement individually. The ECG recording module has a low-noise Instrumentation amplifier with rightleg driver, a notch filter for avoiding power-line interference and an AC-coupled programmable gain amplifier with 28-46 dB. The BI measurement module for body mass index measures the body bioelectrical impedance by a 300 µA/50 kHz AC excitation current. A multi-steps slope analog-to-digital converter (ADC) with sample rate of 500-1000 Sps is designed for digitalizing the analog ECG and BMI value. For power, size and overall cost reduction, electrodes multiplexing technique has been applied in system-level and circuit-level design. This front-end also provides a specified interface module for body temperature sensor DS18B20. Communication to this chip is accomplished using an UART interface. This prototype chip has been designed and fabricated in 0.18 µm 1P6M CMOS process with chip area of 1685×1600 µm 2 .

show abstract