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Definition of "VDR" |
Video Disk Recorder, voice digitization rate / Voltage Dependent Resistor is an electronic component with a diode-like nonlinear current–voltage characteristic. The name is a portmanteau of variable resistor. Varistors are often used to protect circuits against excessive transient voltages by incorporating them into the circuit in such a way that, when triggered, they will shunt the current created by the high voltage away from sensitive components. A varistor is also known as voltage-dependent resistor. A varistor’s function is to conduct significantly increased current when voltage is excessive. / Virtual telecommunication Access Method is an IBM application program interface for communicating with telecommunication devices and their users. VTAM was the first IBM program to allow programmers to deal with devices as logical units without having to understand the details of line protocol and device operation. |
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