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Q. Basic working of optical coupler?
The optical coupler is suitable for frequencies in the low megahertz range. The photodiode type shown above can handle only small currents; however, other types of couplers, combining phototransistors with the SCR, can be used where more output is required. Optical couplers are replacing transformers in low-voltage and low-current applications. Sensitive digital circuits can use the coupler to control large current and voltages with low-voltage logic levels
Q. Sampled-data and digital control systems? These differ fromthe continuous-data systems in that the signals at one or more points of the system are in the form of either a pu
There are many advantages of PLC a.The PLC was specifically designed for harsh conditions with electrical noise magnetic fields vibration extreme temperatures or humidit
Determine the resistance and temperature-coefficient: A platinum coil has a resistance of 3.146 Ω at 40 o C and 3.767 Ω at 100 o C. Determine the resistance at 0 o C and the t
Q. Determine v o /v i for the circuit shown in Figure if the op amps are ideal.
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