# Tagged Questions

Circuit (Network) analysis is the process of finding the voltages across, and the currents through, every component in the network.

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### RC High Pass Filter output drift problem

I am unable to find a proper explanation for this. When I create the passive RC circuit as shown and feed it 8 us pulses at 25KHz, The output of the RC circuit drifts for some time until it settles as ...
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### Node analysis problem

trying to solve using Node method I have stuck. R1=6800 R2=5600 V1=5 V2=-7.2 I am stuck, is it: ((e-5)/6800 + (e- (-7.2))/5600=0 ((e-5)/6800 + (e+7.2))/5600=0 or ((e-5)/6800 + ...
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### Diodes and fixed voltage source [on hold]

This came from my elementary physics lab practical. The piece which I am confused over is the language used so and I quote Note that the ideal fixed voltage source direction is in the opposite ...
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### how to find equations for current of circuit with transistors?

using Ohm's law, i need to find the current for $$I_C , I_B$$ in terms of: $$V_B, V_C, V_{DC1},V_{DC2}$$ for the following ciruit. my solution is: $$V_{DC2}+{I_B}{R_B}={I_C}{R_C}+{V_{DC1}}+{V_E}$$ ...
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### What is the use of an op-amp whose output and inverting input are connected to ground?

I am in first year of Engineering school and I was given an assignment containing this circuit, which drives pressure sensors in a pitot tube : I am struggling to understand the whole circuit, and ...
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### Need help understanding the concept of “Circuit model of a discharging RL circuit”

I don't understand the statements for t<0 and t>0. Why does this happen?
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### Power calculation and Ohm's Law for Reactance

Hi I have the following question: V = 120V, I = 10 A, I lags V by 60degrees simulate this circuit – Schematic created using CircuitLab The load consists of a resistor and an inductor ...
32 views

### Automatic LED lamp with sound sensor

I have an auto light circuit with a sound sensor. The problem is when I try to simulate, this circuit does not work. Here is the circuit. I think the mistake is on the resistor is too large. then I ...
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### Circuit confusion help

Can someone help me understand this circuit. I'm confused how both 5v and 12v are connected to same transistor Q63. Is 5/12v flowing through the same circuit when it's turned on? Or is Q63 simply ...
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### Inductor's self-resonant frequency: Do we want it to be high or low?

Inductor selection always confuses me. There is a spec for inductors as self-resonant frequency. For example, on digikey, as SR frequency of inductors increase, the price may increase or decrease. But ...