circuit analysis

  1. N0t_S0_Sm4rt

    Circuit analysis

    Hello, please, would some good person help me with analysis of this circuit (my guess it's a FM radio). My task is to revive it, however I don't quite know how. What I'd do: 1. Connect the circuit to 9 V voltage source 2. Divide the circuit to 2 parts - AC and DC 3. Search for voltage...
  2. S

    Parallel RLC Circuits in complex notation

    Hello all, Doing my HNC in electrical and electronic engineering and just over half way through now, come across this in my latest module and for some reason I can not get my head around it, I'll post the question and my attempts below, any help would be greatly appreciated just to see if I am...
  3. T

    Circuit Analysis

    For Question 2.1, is the power 500W or 100W ? Do we need to apply the passive sign convention rule for power in whatever cases? Also, i’ve Learnt that we can check answers by balancing power in a circuit. But the power in this kind of circuits don’t balance out, but it is still valid. So when...
  4. James_1

    Role of the two diodes in this circuit ?

    So this is the circuit that I have . I managed to define what his function is. The last question that I had to answer is what role does the 2 diodes Dz and Dh have in our circuit ? I'm not quite sure whether they do have a specific function in this circuit or should I just give a general...
  5. H

    Concept of Bootstrapping in Electronics

    Dear Team, I was trying to study about bootstrapping in electronic circuits. When I checked in Internet Wiki says it is a method to improve the input impedance of an amplifier. In the power electronics context, it has another...
  6. E

    How does the NCP81080 gate driver work?

    How does the NCP81080 dual gate driver work? Now I’ve a circuit need used this components but I couldn’t understand it’s operation principal, Here is datasheet https://www.onsemi.cn/PowerSolutions/document/NCP81080-D.PDF It’s means I need two signal HI and LI input So if I generate square...
  7. Dabu WhiteHacker

    arc lighter circuit working

    Hi, few days ago I got a broken arc lighter used to ignite gas stove. I thought of taking it a apart and look inside the circuit but as per to my knowledge it is confusing me a lot, I hope you guys will be able to remove my confusion so here is the detail. Data It uses 1.5V AA cell to work. This...
  8. V

    AC voltage sensor using Rectifier

    Hello I'm trying to implement a rectifier and AC voltage sensor. The rectifier part works just fine. I'm able to power my device without any issues. Please look at C2 in the screenshot (Circuit schematic). This connector is connected to AC voltages. Vin is a rectifier and the DC part is to...
  9. H

    Why this Simple Watt Meter for 220 Volt Circuit works?

    Hello! I'm just a begginer student. I found this circuit of a wattmeter that works only with resistors. Can someone explain to me how the 33k resistor give a voltage of 1 mV to 1 Watt? I did not understand why these resistor values has been chosen and why the it measures only in the 33k...
  10. M

    3.3v PWM to 10V to drive Power MOSFETS with Low Rds on?

    Hello, I am designing and developing a low voltage Battery management system . i have designed whole circuit but in one small thing i am stuck. kindly help me answering it. Battery Pack specifications: 36 V 2.5 AH 10s battery pack. maximum voltage : 42 v Minimum voltage : 30v Power rail...
  11. B

    Solar emergency light/fan circuit help needed

    Hello great team! I'd immensely appreciate the help of brilliant minds out here. I've Solar rechargeable emergency unit that can power 2 lights and a small table fan. The unit stopped working with a blown resistor on the circuit. I did try replacing the resistor with an identical color coded...
  12. TangoMango

    Finding missing current

    Hello everyone, I was wondering if I could get some help on this question below. I know it's says use kcl but I'm just not seeing how I can find these missing currents. Any help is greatly appreciated! Also this is my first circuit analysis class so I'm sorry if the answer is blatantly obvious!
  13. Lambo Av

    Circuit Breaker Location

    Hi, in IEEE 3 bus, why are circuit breakers connected at the 'load' rather than connected at the 'generator and load'?
  14. kwoki

    Derivation of RLC parameters from a complex RLC circuit

    Hey guys, I am having trouble with a problem. I would like to derive a formula for some parameters (resonance frequency, Quality factor, Wcl and Wch) Normally, you will use a general second-order function for a second-order RLC circuit (which is easy to derive). However, my circuit is much more...
  15. N

    Nodal Analysis Question Incorrect

    Much like my last thread, I have another homework problem in which I must solve for a current value using nodal analysis. I've attempted the problem using some techniques to visualize the circuit from the last forum post and felt confident in my answer, however it is again incorrect and I'm not...
  16. System/360

    What is Pull up/down?

    What does pull up mean? In circuit examples, for example for a ESP8266 chip, pull up is connecting to Vcc through a 10kΩ resistor. Why 10k? How is this value derived? I have seen two separate cases of pull down. One connects to a 10kΩ to ground while another connects directly to ground. Hope...
  17. T

    how to determine the small signal parameters(gm, ro) of nMOSFET from Datasheet?

    as I want to calculate the transfer function of circuit that is meant to generate source current using an Op amp as control loop, I need the gm and r0 of the mosfet(to determine the transfer function of the Op amp current source with nMOSFET) here is the picture of MOSFET with showed parameters...
  18. A

    Find V th

    How to find Vab ?
  19. Alcore

    Finding an unknown resistance

    Hello. This may be a simple problem, but I'm struggling to obtain the resistance R found in the figure below. First what's throwing my are the two voltage sources. I'm used to seeing these present in op-amps, but the way they intersect is throwing me. I'm not sure how to determine their...
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