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Type: Posts; User: FvM

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  1. Replies
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    Closed: Re: STM32F103VET6 and CH340G

    CH340G 3.3V bypass capacitor missing.
  2. Closed: Re: Need information about related application to power electronics

    The linked thyristor controller is for heating control and won't work for AC motors. These days most small and medium size AC motors (e.g. up to 100 or 200 kW) are controlled by VFD inverters if...
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    Closed: Re: BJT amplifier design

    Apparently from the same course, but a considerably different problem.

    I presume that the solution can be elaborated based on the course material, which we unfortunately don't know. Thus the...
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    Closed: Re: Ferrite bead usage in ADC's

    Isolation between AGND and DGND in the 100 MHz or even GHz range isn't but an illusion. It neither works on the PCB level, because the planes are coupled planar structures nor on the chip level,...
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    Closed: Re: LoopGain analysis with multiple feedback loop

    I presume the simulation will show you what's happening. You have to look at the output impedance of complementary loop and how it affects the loop gain. If you have a LTspice or generic SPICE...
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    Closed: Re: Power Oring Using Mosfet

    The report makes no sense. According to given schematic, the MOSFET is switched off when V(ADPT) - V(out) > Vth. Assuming a threshold of 1 V, this happens already with V(ADPT) > V(bat) - 1.

    The...
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    Closed: Re: load sensing circuit/relay

    Depends on the relay size. CT with up to a few W output are feasible. Sensitive relays switching 250V/10A have 0.5W nominal coil power, signal relays considerably less.
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    Closed: Re: Designing an amplifier with particular values

    Here's a circuit from Tietze, Schenk, Halbleiterschaltungstechnik (Electronic Circuits Handbook), 11th German edition, pg. 154. It can be probably modified to achieve the intended specs, hence you...
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    Closed: Re: Ferrite bead usage in ADC's

    Any indications that a newer version than Rev.0 linked in my previous post exists at all?



    Nevertheless, the datasheet has a clear suggestion:
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    Closed: Re: Oscillations dying out

    "Some nanoseconds" sound like a pure simulation question. Anyway, show a schematic.
  11. Closed: Re: three phase volt measurement using resistor network method

    I don't see a specific reason in the code for getting outliers in the first channel.

    Determining the absolute maximum of instantaneous voltage is however a poor method to measure AC voltage. A...
  12. Closed: Re: Regulating temperature of mains connected heating element: Skipping mains half cy

    Apart from component costs, to reduce power dissipation at 32 A below triac level, you would need less than 18 mOhms Rdson for each of the two MOSFETs. Did you identify suitable transistors?
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    Closed: Re: Need Help to Identify Component

    Two reed switches, at least one of it broken.
  14. Closed: Re: Motor pump starter connection with two relay to operate manual and auto

    Double pole PCB relays are surely available, you should however talk about current rating. The original manual circuit has the disadvantage that the push button switches have to carry the full motor...
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    Closed: Re: Reducing RAM & ROM consumption in coding

    Of course you need to take care of the number range. Under circumstances, the multiplicand must be casted to long before multiplying with 62.
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    Closed: Re: Operation of MCB shunt tripping module

    You don't need to disassemble it to know how it works.

    Some MCB series have a mechanical interface for auxiliary modules, either signal contacts or external actuators. Shunt tripping module is...
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    Closed: Re: LoopGain analysis with multiple feedback loop

    If we abstract from all parasitic elements like MOSFET capacitances, only have a single pole OP and ideal gm, the OP pole translates into a zero in the output impedance of each reference circuit. It...
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    Closed: Re: Equivalent feed back model transformation

    Miller capacitor is inside the OP, it modifies av and Zo.
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    Closed: Re: Equivalent feed back model transformation

    The problem is about extracting Zi, Zo and av from your circuit. As mentioned in your previous thread, an OTA could be better modelled as a current source than a voltage source. But formally, you can...
  20. Closed: Re: Require a Desgin of A MOSFET based Switch , for study purpose .

    You are still missing a basic understanding of MOSFET operation.

    To get a better idea, you can use the post #9 simulation circuit and perform a dc sweep as shown below. Determine for which Id and...
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    Closed: Re: Testing Amps on rewound microwave transformer

    Magnetron transformer is special design (with artificially increased leakage inductance) to achieve constant current output. It's no well suited for general transformer applications.
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    Closed: Re: LoopGain analysis with multiple feedback loop

    I missed the link in the original post. Please upload schematics with the post, as required by forum rules.

    Loop gain analysis has to be performed for both loops. VLG seems like a good place to...
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    Closed: Re: Reducing RAM & ROM consumption in coding

    You have implemented float math for a few calculations that can also use integer math. Dropping the float library will save a lot of ROM, unless you need it otherwhere. dsPIC30F2010 has little RAM...
  24. Closed: Re: Require a Desgin of A MOSFET based Switch , for study purpose .

    Should be considered ohmic range, isn't it.

    The supply voltage is dropped at R1.
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    Closed: Re: How can we send multiple bytes via UART?

    Why are you repeating the inappropriate description?

    Your send code can be shorted as

    UART_send_string("ABC");

    There's absolutely no problem to send multiple bytes, the run time library is...
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