ABSTRACT This paper describes a realization of a bipolar current source developed by the paper authors. The source is intended for the application in galvanic and other industrial plants where pulse-reverse current supply is required (with the desired shape in time). A prototype of the device which provides the outcome current intensity up to ± 50 A, has been constructed. The hardware of the so...

The review presents the newly published book “Electrophysiological Recording Techniques” by Humana Press. This is an important collection of articles devoted to an issue that has gained increasing attention in modern neuroscience research electrophysiological recording techniques. The present book is a timely update of methods spanning from single cell recordings to local field potentials, cort...

Measuring and inducing neural activity in neurons using extracellular fields provides great insight into neurons functions and how they process information. This paper will consider the problem of trying to selectively sense and induce activity in neurons within a network in a living organism, using a small array of electrodes placed some distance away. One way to approach this problem is to so...

For the analog-to-digital conversion lab, we need a resetable ramp generator. Here, we explore building a ramp generator from a current source. We show two implementations that both use a PNP current source.

The microelectronic measuring system for conductivity electrochemical sensor measurement of liquid materials properties was designed in CMOS technology. The main parts of the system are current source with switchable ranges, the sensor switches allowing change of the current polarity in compliance with the bipolar pulse method, which was developed specially for this measurement purposes at the ...

A precision DC low-current source based on charging a capacitor with a linearly varying voltage ramp was built to calibrate low-current meters in the range of 100 pA to 1 fA. For a calibration of Keithley 6430, the relative expanded measurement uncertainty (k=2) was evaluated to be 16 μA/A ~ 62 mA/A within the current range. In the calibration process, it was observed that the offset current of...

This paper presents a comprehensive survey of the current source inverter (CSI)-fed induction motor (IM) drives. It also reviews various control methodologies, selective harmonic elimination techniques and methods for reduction in switching losses in CSI fed IM drives. Authors strongly believe that this survey article shall be very much helpful to the researchers working in the field of CSI fed...

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A new method for automated spike sorting for recordings with high density, large scale multielectrode arrays is presented. It is based on an e cient, low-dimensional representation of detected events by their estimated spatial current source locations and dominant spike shape features. Millions of events can be sorted in just minutes, and the full analysis chain scales roughly linearly with rec...

In this contribution, we report on the application of a novel, high accuracy, arc characterization method to wall constricted arcs in cylindrical nozzles with low blow pressure. The method makes use of a novel current source that is able to produce nearly arbitrary current shapes. With it, it is possible to derive the stationary and transient arc characteristic independent of each other but wit...