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Recent content by chandresha1

  1. C

    How to calculate active power from waveform.

    Thanks... here there are three text files containing vectors of time, current and power.
  2. C

    How to calculate active power from waveform.

    Yes, actually in LTspice the power probe can directly compute P(t) by multiplying V(t)*I(t), It also shows average power over entire period of time and Energy in terms of joule. The waveform is attached. I also have three text vector files containing data for voltage, current and power but don't...
  3. C

    How to calculate active power from waveform.

    I think i should compute V*I over all the sample data and than i should calculate the average of all sampled multiplication which gives average power. Am i right? Because if i integrate V*I than i should get energy instead of power. Is my understanding correct? In Ltspice, there is a power...
  4. C

    How to calculate active power from waveform.

    I am simulating a reactive load in LTspice. I got a voltage and current waveform with some phase delay due to reactive nature of the circuit. I want to calculate the total power given to the load. I have attached a voltage and current waveform measured across load.
  5. C

    Calculation of component values from Transfer function for desired cut-off frequency

    Ok, I think i have to tune the component of filter and need to check frequency response in LTspice.
  6. C

    Calculation of component values from Transfer function for desired cut-off frequency

    I am designing a LC low-pass filter for reactive load(Combination of capacitor and Resistor). I want to design 3rd order butterworth filter in order to filter out all the high frequency component present in amplified PWM signal. My switching frequency is 2MHz and desired output signal frequency...
  7. C

    [SOLVED] Drain-current calculation in High-side N-channel Mosfet switch.

    Thanks a lot to everyone....... I felt i am such a stupid, i couldn't understand even a ohm's law properly.:-( As the current will increase, voltage drop will also increase across the device. Its as simple as its sound. :-) Now i am satisfied with explanation.
  8. C

    [SOLVED] Drain-current calculation in High-side N-channel Mosfet switch.

    Actually i am designing Class-D amplifier and for the high-side MOSFET, yes Vds is in loop with V+. I have attached diagram. But still i have one doubt. As shown in my block diagram, when high-side MOSFET Q1 turns-on the Vds becomes very small due to the small on-resistance. It is around...
  9. C

    [SOLVED] Drain-current calculation in High-side N-channel Mosfet switch.

    Yes it seems i understood the whole concept in a different way. Yes the current depends on potential difference only. So if Vds is small than definitely the current will be small. Thanks everyone for clearing my doubt.
  10. C

    [SOLVED] Drain-current calculation in High-side N-channel Mosfet switch.

    I have read these terminology in plenty of document. The left part of characteristic graph termed as Triode region or ohmic region or liner region for the condition of Vgs-Vth>> Vds. The right side termed as saturation region(Vgs-Vth<Vds) as drain current becomes constant regardless of Vds. You...
  11. C

    [SOLVED] Drain-current calculation in High-side N-channel Mosfet switch.

    I have drawn this curve by myself just for understanding. I actually understood that Mosfet will act as a switch with very low on-resistance. But i m getting confused at below equation of drain current in triode mode. Id=K(Vgs-Vth)Vds, for Vds<<Vgs-Vth. According to this equation for very...
  12. C

    [SOLVED] Drain-current calculation in High-side N-channel Mosfet switch.

    I am working on H-bridge circuit with PWM. It is basically class-D amplifier with four N-channel Mosfet. However, i am stuck at one-point. How to calculate the drain current for high side Mosfet? The configuration is shown in figure. I am applying 30V Gate voltage(Respect to Ground). Drain is...
  13. C

    Analog passive filter design for Complex load(inductive and capacitive)

    My peizo has two resonance frequency because series and parallel structure of circuit. Actually my problem is little bit different now. I have already implemented filter circuit for digital to analog conversion and tested with my PWM signals(2Mhz) from microcontroller. My configuration is...
  14. C

    Analog passive filter design for Complex load(inductive and capacitive)

    I have attached the circuit which shows the filter and my complex load. My question is how to compensate transducers reactance? means should i calculate the resultant impedance of the load in the form of R+jX? If yes, than how to design compensating network for it? I am new in this field so...
  15. C

    Analog passive filter design for Complex load(inductive and capacitive)

    [Moved]Compex load in Butterworth analog filter design. I am designing butterworth filter for digital to analog conversion. Finally i have to drive piezo-actuator. Piezo is a complex load and i have electrical model for it. I already have design a filter which gives me desired frequency...
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