Circuit Analysis of Opto Coupler Circuits.

(c) The diagram of FIGURE 2 shows a bi-directional opto coupler input interface circuit. When a supply voltage of 20 V is applied the LED carries a current and 2 V is dropped across it. Calculate the value of the LED current and the value of current through the 3 k? resistance. FIG. 2 Please refer to the attachment.

(b) The diagram of FIGURE 2 shows a bi-directional opto coupler input interface circuit. When a supply voltage of 20 V is applied the LED carries a current and 2 V is dropped across it. Calculate the value of the LED current and the value of current through the 3 k resistance. External wiring

Write the LaPlace-transformed loop equations for these two circuits by inspection. Use matrix notation. Include initial conditions. See attached file for full problem description.

9.2-2 only please, in terms of iL. See attachment. 9.2-2 Find the differential equation for the circuit shown in figure P9.2-2 using the operator method.

How would I find the equivalent resistance R_ab of the following circuit?

(1) I have five circuits and want to run each one, one at a time, and then all five at the same time. My source is 12Vdc and 1500mA. The first circuit is 1.992 Mega ohms, the second is 3248 ohms, the third is 13.2k ohms, and the fourth is 0.247 Mega ohms and the fifth is .777k ohms. Now, the first four circuits use 5V and the

1) If caps block dc what is the purpose of a cap in a dc circuit? 2) What does an inductor do in a dc circuit? 3)What is the point of having a cap to ground in a dc circuit? 4)What is the purpose of a null modem? 5) How do you design a circuit to use caps or inductors in a dc circuit? An ac circuit? 6) What is a

See attached file for full problem description. Please solve question number 6 only. 6. Calculate all of the unknown voltages and currents in the above circuit, using either node-voltage, mesh-current, or superposition method. Mark your answers directly on a copy of circuit. In all cases, label the actual direction of curren

Please see attached for full questions and give detailed answers. I am trying to check my answers against someone elses. Thanks in advance.... 1. The impulse response for a circuit is...... 2. The transfer function for a circuit is..... 3. ...is the circuit impulse stable? 4. Consider a series RLC circuit with .... 5. The