Fully Programmable Bias Current Generator with 24 Bit Resolution Per Bias

AbstractThis paper introduces some levels at which the computer has been incorporated in the research into the basis of electrocardiography. The emphasis lies on the modeling of the heart as an electrical current generator and of the properties of the body as a volume conductor, both playing a major role in the shaping of the electrocardiographic waveforms recorded at the body surface. It is claimed that the Forward-Problem of electrocardiography is no longer a problem. Several source models of cardiac electrical activity are considered, one of which can be directly interpreted in terms of the underlying electrophysiology (the depolarization sequence of the ventricles). The importance of using tailored rather than textbook geometry in inverse procedures is stressed.

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Effect of DC-Bias Current in Perpendicular Magnetic Recording

Journal of the Magnetics Society of Japan ◽

10.3379/jmsjmag.28.275 ◽

2004 ◽

Vol 28 (3) ◽

pp. 275-278

Author(s):

K. Taguchi ◽

S. Takahashi ◽

K. Yamakawa ◽

K. Ouchi

Keyword(s):

Magnetic Recording ◽

Bias Current ◽

Perpendicular Magnetic Recording ◽

Dc Bias

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Weak-field dissipative conductivity of a dirty superconductor with Dynes subgap states under a dc bias current up to the depairing current density

Physical Review Research ◽

10.1103/physrevresearch.2.013302 ◽

2020 ◽

Vol 2 (1) ◽

Cited By ~ 3

Author(s):

Takayuki Kubo

Keyword(s):

Current Density ◽

Weak Field ◽

Bias Current ◽

Dc Bias

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A Dual Rising Edge Shift Algorithm for Eliminating the Transient DC-Bias Current in Transformer for a Dual Active Bridge Converter

Energies ◽

10.3390/en14144264 ◽

2021 ◽

Vol 14 (14) ◽

pp. 4264

Author(s):

Michal Gierczynski ◽

Lech M. Grzesiak ◽

Arkadiusz Kaszewski

Keyword(s):

Phase Shift ◽

Power Flow ◽

Bias Current ◽

Compensation Algorithm ◽

Dual Active Bridge ◽

Simple Implementation ◽

Dc Bias ◽

Fast Settling ◽

Parameter Values ◽

Laboratory Prototype

This paper deals with a well-known problem of the transient DC-bias current occurring during a phase shift transition in dual active bridge (DAB) DC/DC converters. This phenomenon, if not compensated, can cause damage to the converter or deteriorate its performance. One aim of this paper is to present a solution which allows for the elimination of the undesired transient DC-bias component in current waveforms. This solution is the dual rising edge shift (DRES) compensation algorithm. It provides a very simple implementation and fast settling time within the first half of a switching period. Moreover, the solution is independent on any measurements or system parameter values. It is based on the double-sided single phase shift (DSSPS) modulation, which is described in detail along with a converter model in steady-state. Then, the mechanisms leading to the transient DC-bias are explained, and the compensation algorithm is derived. The performance of the algorithm has been tested using a laboratory prototype. A comprehensive set of tests, involving rapid step changes in power flow and frequency sweep, are provided. Finally, the features of the proposed algorithm are briefly discussed.

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