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  1. E

    Electrical circuit Analysis

    The circuit i have drawn and the results i am getting are completely mismatch, i think the circuit is wrong or the spice is not doing the simulations properly.
  2. E

    Electrical circuit Analysis

    This is how i solved using the LR circuit the equation i get is Are these calculations correct? But after long time the current will be 0? How is it possible?
  3. E

    Electrical circuit Analysis

    I have applied inverted PWM's, now the current amplitude is bigger.
  4. E

    Electrical circuit Analysis

    Since the current seem to be fluctuating increasing and decreasing instead of a straight line. Yes i am trying that i will show.
  5. E

    Electrical circuit Analysis

    Can I assume this also as 0 amp current since it is in fA? I don't understand the behavior.
  6. E

    Electrical circuit Analysis

    I get 0 Amp. Is it that i shall not do transient analysis for constant voltage supplies?
  7. E

    Electrical circuit Analysis

    I am trying to understand the below circuit My analysis of the circuit is since 5V is connected to both ends of the circuit there will be no current flow. Is it correct? Anything more i can understand from this circuit, this circuit is created by me to analyze different ways.
  8. E

    Power Calculation

    Consider a simple switched circuit VDD = 600V RL = 100 Ohm. The on-state resistance of the switch, Ron = 2Ohms. What is the magnitude of the power in kW, provided by the source when the switch is closed? Power = V^2/R = 600 * 600 / 102 =3.52kW. The calculations are ok?
  9. E

    Opamp Filter circuit

    But for step or pulse inputs the analysis will be different compared to the sinusoidal signals, the impedance is never used in my understanding, and a pulse input has several frequencies how do we consider that?
  10. E

    Opamp Filter circuit

    I am really worried of my understanding with the explanation, since i considered the pulse input can impedance come into analysis for the capacitor, it is done only for AC signals?
  11. E

    Opamp Filter circuit

    I just used a random value for C1.
  12. E

    Opamp Filter circuit

    Another Opamp filter circuit, this is the recommended filter circuit from ST micro ST datasheet on page 13. I tried to simulate the circuit using Ltspice but i do not see any gain I have not yet verified the filtering. But why there is no gain?
  13. E

    Noise and Glitches

    I am struggling to understand and fix the issues of noise and glitches, it is motor controller application with frequency switching of 20KHz, what is the impact of this kind of pwm switching. What exactly happens in this kind of application, does it impact PCB, signals everything? How do i know...
  14. E

    Opamp + capacitor gain circuit

    Can you please explain how did you find this?
  15. E

    Opamp + capacitor gain circuit

    Trying the impact of capacitor in the opamp circuit as below The equations of the opamp are V1 - i1R2 -i1R1=Vout -> 1 The voltage at inverting input is same as non inverting input V1 - i1R2 = 1/Cic dt -> 2 But there is no current in positive terminal as high impedance of the opamp, so i assume...
  16. E

    Inductance circuit

    Ok understood i simulated the below circuit It is able to maintain the direction of current for some time.
  17. E

    Inductance circuit

    I want to simulate a condition and verify the current behavior in Inductor. The below is the circuit The response of the circuit is I want to simulate a case where my input is off pulse goes to 0V, then the current shall flow for certain time in the same direction. I think that is the nature...
  18. E

    Oscilloscope always showing Sine Wave

    Yes it is around 50Hz, the input is 12V dc, i shorted the bnc but with power off, do i need to power on the oscilloscope will it damage the scope?
  19. E

    Oscilloscope always showing Sine Wave

    What does short circuit its input jack mean? How to do it?
  20. E

    Oscilloscope always showing Sine Wave

    The oscilloscope is Keysight DSOX1204A, yes it worked fine for quite several months.
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