During tap changing with main contacts broken and ohmic contacts made, an equalising current, dependent on the tap change voltage, flows across the ohmic contacts. A diode (16, 19) is in parallel to each resisto
美[ˈdaɪˌoʊd] 英[ˈdaɪəʊd] n.(电子)二极管 网络二极体;二级管;普通二极管 复数:diodes 权威英汉双解 英汉 英英 网络释义 diode n. 1. (电子)二极管an electronic device in which the electric current passes in one direction only, for example a silicon chip...
A simple photoreceiver and its equivalent circuit. Using just a resistor as the current-to-voltage converter works but the equivalent circuit in the right-hand circuit of Figure 19.7 shows a potential problem. The photodiode has a natural (that is, parasitic) capacitance which will interact ...
During this mode of operation active power is delivered to the load resistor and energy is stored in the load inductor. Using the equivalent circuit of this mode, which is shown in Fig. 2.16(b), the output current that flows though the circuit can be found and is given by: (2.88)io=...
The Diode block is simulated by a resistor, an inductor, and a DC voltage source connected in series with a switch. The switch operation is controlled by the voltage Vak and the current Iak. The Diode block also contains a series Rs-Cssnubber circuit that can be connected in parallel with...
resistor. This DC path drains any excess charge and results in an average or DC output voltage of zero. This is useful if we want to force the average value of the AC signal to be referenced to a known value, however, what if we want to force the positive or negative peak of the ...
theForward voltageparameter, the diode behaves as a linear resistor with the resistance specified in theOn resistanceparameter. Otherwise, the diode behaves as a linear resistor with the small conductance specified in theOff conductanceparameter. Zero voltage across the diode results in zero current ...
IV curves (or current-voltage characteristic curves) are a common method of characterising electrical devices. They reveal the relationship between the voltage applied across a device and the current flowing through it.
The current bias for the sample was set by taking an ac voltage, U, from a National Instrument data acquisition card NI-DAQ USB-6216 output and applying it to the sample connected in series with a known standard resistor Rst. Typically, Rst = 10 kOhm. The same NI-DAQ card was...
Some snubber circuits use a medium speed diode in series with a resistor, so that the diode blocks current during switch turn-on, but is conducting in both directions for a period of about 250 ns after switch turn-off. This allows any ringing current to flow through the resistor and thus...