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 …

Bio-signal instrumentation amplifier (Bio-IA) is one of the most important circuit in the vital
sign monitoring system. However, the performance of the Bio-IA using traditional …

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 …

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 …

This article proposes a technique for increasing the input impedance of conventional
capacitively-coupled neural amplifiers based on careful examination of its analytical model …

This paper proposes a directly coupled instrumentation amplifier (IA) for EEG signal
acquisition. By integrating both chopping and auto-zeroing (AZ) techniques, an offset and 1/f …

One of the major challenges in the acquisition of neural signals is the design of electronic
signal acquisition system. Specialized amplifier circuitry is required in the neural recording …

A study of negative impedance and its applications to power electronics is presented in this
paper. In a power electronic circuit, passive components consist of parasitic resistance …

Negative impedance convertor is introduced to build a high input impedance chopper IA for
implantable EEG recording. The compensation theory is analyzed in detail to reveal the …

An On-chip digitally calibrated impedance boosting technique based on negative-
impedance-converter (NIC) is presented to improve the input impedance of AC-Coupled …