A low power and low noise front end chopped instrumentation amplifier for portable electrocardiogram recording system is presented. The circuit is based on the chopper technique which is implemented using folded cascode structure that has significant lower power consumption than the predecessor’s approaches while keeping the performance unchanged. The chopper switches modulate noise from a low ...

A new CMOS fully differential bandpass amplifier (BPA) based on the structure of a transresistance (Rm) amplifier and capacitor is proposed and analysed. In this design, the Rm amplifier is realised by a simple inverter with tunable shunt-shunt feedback MOS resistor and tunable negative resistance realised by crosscoupled MOS transistors in parallel with a current source. The capacitor is in se...

This paper describes the development of a very low-power pre-amplifier intended for use in pasteless-electrode recording of the human electrocardiogram. The expected input signal range is 100μV 10mV from a lead II electrode configuration. The amplifier provides a gain of 42dB in a 3dB bandwidth of 0.05Hz 2kHz with an input impedance of 280MΩ and a CMRR of greater than 80dB. Its gain and phase c...

The preamplifier block is crucial in bio-medical signal processing. The power intensive Operational Transconductance Amplifier (OTA) is considered, and the performance of preamplifier is studied. A low noise and low power telescopic OTA is proposed in this work. To reduce the noise contribution in the active load transistors, source degeneration technique is incorporated in the current stealing...

In the literature, Improved Recycling Folded Cascode (IRFC) Operational Transconductance Amplifier (OTA) is proposed for enhancing the DC gain and the Unity Gain Bandwidth (UGB) of the Recycling Folded Cascode (RFC) OTA. In this paper, an enhanced IRFC (EIRFC) OTA which uses positive feedback at the cascode node is proposed for enhancing the differential mode (DM) gain without changing the unit...

A biopotential amplifier for single supply operation is presented. It uses a Driven Right Leg Circuit (DRL) to drive the patient's body to a DC common mode voltage, centering biopotential signals with respect to the amplifier's input voltage range. This scheme ensures proper range operation when a single power supply is used. The circuit described is especially suited for low consumption, batte...

Intermolecular Disulfide Bonds among Nucleoporins Regulate Karyopherin-dependent Nuclear 1 Transport 2 3 Shige H. Yoshimura, Shotaro Otsuka, Masahiro Kumeta, Mariko Taga, and Kunio 4 Takeyasu 5 6 Graduate School of Biostudies, Kyoto University, Yoshida-konoe-cho, Sakyo-ku, Kyoto, 606-8501, 7 Japan 8 Centre Mémoire de Ressources et de Recherche (CMRR) and Department of Histology and Biology of 9...

Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to estimate uniaxial compressive strength, index-to-strength conversion factors are used. These factors have been proposed by various researchers and are depen...

In the literature, Improved Recycling Folded Cascode (IRFC) Operational Transconductance Amplifier (OTA) is proposed for enhancing the DC gain and the Unity Gain Bandwidth (UGB) of the Recycling Folded Cascode (RFC) OTA. In this paper, an enhanced IRFC (EIRFC) OTA which uses positive feedback at the cascode node is proposed for enhancing the differential mode (DM) gain without changing the unit...