A fully differential capacitively-coupled high CMRR low-power chopper amplifier for EEG dry electrodes

An Ultra High CMRR Low Voltage Low Power Fully Differential Current Operational Amplifier (COA)

this paper presents a novel fully differential (FD) ultra high common mode rejection ratio (CMRR) current operational amplifier (COA) with very low input impedance. Its FD structure that attenuates common mode signals over all stages grants ultra high CMRR and power supply rejection ratio (PSRR) that makes it suitable for mixed mode and accurate applications. Its performance is verified by HSPI...

A Low-Power CMOS Chopper Amplifier for EEG Acquisition Systems

T demand for technologies that help neuroscientists and clinicians to actively observe a large number of neurons in the brain has increased significantly. Currently the biopotential acquisition systems are bulky and not portable that makes it difficult for the on-going diagnostics and causes discomfort to the patient. There is a need to make these systems more compact and to extend their applic...

A Low Power Low Voltage Rail to Rail Constant gm Differential Amplifier with 150 dB CMRR and Enhanced Frequency Performance

This paper proposes a low voltage (±0.55V supply voltage) low power (44.65µW) high common mode rejection ratio (CMRR) differential amplifier (d.a.) with rail to rail input common mode range (ICMR), constant transconductance (gm) and enhanced frequency performance. Its high performance is obtained using a simple negative averaging method so that it cancels out the common mode input signals at th...

Low Power Low Noise CMOS Chopper Amplifier

AbstractChopping is a proficient way to reduce the low frequency offset and 1/f noise in amplifiers. In this paper, a low power low noise CMOS chopper amplifier is presented. It is composed of a two stage amplifier. The first stage’s high output impedance and the equivalent Miller capacitance of the second stage constitute together a low pass filter, which reduces the power consumption. The cir...

Draft 2: A Low Power CMOS Chopper Amplifier for EEG Acquisition Systems