Blar i Institutt for teknisk kybernetikk på forfatter "Ytterdal, Trond"
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A fully differential capacitively-coupled high CMRR low-power chopper amplifier for EEG dry electrodes
Habibzadeh Tonekabony Shad, Erwin; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Journal article; Peer reviewed, 2020)The use of dry electrodes is increasing rapidly. Since their impedance is high, there is a high impedance node at the connecting node between the electrode and amplifier. This leads to absorb powerline signal and high CMRR ... -
Impedance and Noise of Passive and Active Dry EEG Electrodes: A Review
Habibzadeh Tonekabony Shad, Erwin; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Peer reviewed; Journal article, 2020)Dry electrodes are a promising solution for prolonged EEG signal acquisition, whereas wet electrodes may lose their signal quality in the same situation and require skin preparation for set-up. Here, we review the impedance ... -
A Low-power and Low-noise Multi-purpose Chopper Amplifier with High CMRR and PSRR
Habibzadeh Tonekabony Shad, Erwin; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Chapter, 2020)In this article, by choosing and optimizing suitable structure in each stage, we have designed a multi-purpose low noise chopper amplifier. The proposed neural chopper amplifier with high CMRR and PSRR is suitable for EEG, ... -
A Low-power High-gain Inverter Stacking Amplifier with Rail-to-Rail Output
Habibzadeh Tonekabony Shad, Erwin; Moeinfard, Tania; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Chapter, 2021)In this article, a rail-to-rail low-power amplifier is presented based on stacking inverter-based amplifiers. The output voltages of each inverter-based amplifier are converted to a current and then mirrored to the output ... -
Modified Current-reuse OTA to Achieve High CMRR by utilizing Cross-coupled Load
Habibzadeh Tonekabony Shad, Erwin; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Chapter; Peer reviewed, 2019)Since biomedical signals have very low amplitude and high common-mode like environmental noise, the amplifiers used with these signals should have high CMRR. The cross-coupled amplifier attenuates common-mode signal strongly ... -
A Power Efficient, High Gain and High Input Impedance Capacitively-coupled Neural Amplifier
Habibzadeh Tonekabony Shad, Erwin; Moeinfard, Tania; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Chapter, 2020)In this article, a capacitively-coupled neural amplifier based on a new high gain low-noise amplifier is proposed. By utilizing a cross-coupled structure, the open-loop gain of the amplifier is boosted. This modification ... -
A Two-stage Area-efficient High Input Impedance CMOS Amplifier for Neural Signals
Habibzadeh Tonekabony Shad, Erwin; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Chapter, 2021)In this article, a two-stage area-efficient high input impedance neural amplifier is proposed. It has been shown that two single-stage amplifiers with low gain will consume less area in comparison with a single-stage high ... -
A Very Low SEF Neural Amplifier by Utilizing a High Swing Current-Reuse Amplifier
Naderi, Kebria; Habibzadeh Tonekabony Shad, Erwin; Molinas, Marta Maria Cabrera; Heidari, Ali; Ytterdal, Trond (Chapter, 2020)Although current-reuse amplifier has been widely used in biomedical applications because of their low input-referred thermal noise, they don't have high output swing and their gain is limited. In this article, a rail-to-rail ...