Abstract
Major concerns which clearly express necessity of analog isolator applications, are removing ground loop, increasing common-mode voltage rejection, improving noise immunity and protecting operator, expensive equipment and data from transient voltages. Optical coupling is an approach to signal isolation in which all mentioned benefits are covered. This paper is going to propose a novel idea of a particular optical analog signal isolator. It is introduced for the first time and therefore the authors named it YOUTAB. The digital photocoupler NEC-PS2501 constitutes the main structure of this new isolator. In general, the proposed configuration consist of two different parts that one of them transfers the signal and the other establishes a negative feedback to ensure that the output signal has the same features of the input signal. The operation, analysis and computer simulation results are shown. The simulation results show that this novel proposed analog isolator is linear in a wide range of inputs.
Highlights
The application of galvanic insulators has continuously increased in electronic circuits in order to achieve a high safety and reliability in signal process and transmission circuits
In YOUTAB configuration, the analog signal is transmitted directly and, the passed on current sample is used to establish a negative feedback [Figure 1] for achieving to a linear signal transmitting via internal close loop
YOUTAB configuration introduces a new analog isolator that works based on optical coupling method
Summary
The application of galvanic insulators has continuously increased in electronic circuits in order to achieve a high safety and reliability in signal process and transmission circuits. A considerable problem here is the high differential potential between two different grounds which could lead to damage of devices while human safety is lost Other phenomenon such ground loops in many applications caused to considerable decline in signal quality. In YOUTAB configuration, the analog signal is transmitted directly and, the passed on current sample is used to establish a negative feedback [Figure 1] for achieving to a linear signal transmitting via internal close loop. This feature distinguishes our idea from existing analog isolators. The simulation results explain different aspects of YOUTAB operation
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