A 1.2V improved operational amplifier for bio-medical applications

Santhanalakshmi, M.; Vanathi, P. T.

doi:10.1504/ijbet.2012.049218

Cited by 1 publication

(1 citation statement)

References 15 publications

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“…Current trends in patient monitoring and home healthcare (Puentes et al, 2007;Pallikonda et al, 2010) are towards small wireless devices (Fariborzi and Moghavvemi, 2009;Agarwal et al, 2010;Al-Busaidi and Khriji, 2014), which must be robust to EMI sources, and easy to install by the patient himself or herself. Moreover, this must be accomplished using low power and low voltage components (Santhanalakshmi and Vanathi, 2012) in order to preserve battery consumption.…”

Section: Literature Backgroundmentioning

confidence: 99%

Capacitive driven-right-leg circuit design

Haberman

Spinelli

García

et al. 2015

IJBET

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Capacitive electrodes allow to pick-up biopotentials through a dielectric layer, without using electrolytes. However, this technique is vulnerable to electric-field interference, mainly to common mode voltages produced by the 50 Hz power-line. A fully Capacitive Driven Right Leg (CDRL) circuit is proposed to reduce the patient common mode voltage v CM . The design of this circuit takes into account several factors as electrode impedance, stray coupling capacitances and amplifier transfer function response. All these parameters are addressed to ensure the circuit's stability in most biopotential acquisition scenarios. Monte Carlo analyses were performed to find the worst conditions, resulting in a maximum CDRL gain between 70 and 80 dB. The CDRL was implemented as an independent block that can be used for different applications such as ECG, EMG or EEG. Several experimental results are presented, showing good quality recordings even using SE amplifiers, an appropriate approach for multichannel acquisition systems.

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