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Type: Posts; User: FvM

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    Closed: Re: Audio Mixing console

    Review the description of usual mixer consoles. There are one or multiple effect/monitor sums with separate send level control for each input channel. You surely find schematic diagrams of mixer...
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    Closed: Re: Current Coil interfacing with controller

    The calculation in post #1 is wrong, you forgot the transformer turns ratio. With 1:100 ratio, the output voltage is only 1/100 of the calculated. As a first step, I would check if the primary...
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    Closed: Re: Series rlc and parallel rlc circuits

    Taking the RLC series circuit as an example, all elements carry the same current, but voltages have different, even opposite phase according to the reactive nature of C and L. The behavior can be...
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    Closed: Re: CMRR is less than the DC differential gain

    In line with the fully differential amplifier threads you have posted during the last months, I assume that your amplifier will be operated with external feedback and the said "DC differential gain"...
  5. Closed: Re: How to build current source based on modified Hawland current pump for 150 mA?

    Varying R5 is not feasible if you want current source characteristic. The equations for Howland current source have been frequently discussed at Edaboard, e.g. in this thread
    ...
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    Closed: Re: ModelSim is not reporting errors properly

    Modules are compiled separately, the error will pop up when you simulate (.e.g module "not bound" error). That's how the simulator works. There will be surely an error message, just read the...
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    Closed: Re: can boost converters cause gate loop ringing

    To discuss "gate loop" ringing, we should look at the gate driver circuit, not a boost converter data sheet.
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    Closed: Re: Rotary capacitor physics and design

    Returning from a journey, I see that the layered capacitance calculation fault this thread is based on still hasn't been corrected.

    You have accepted that at rotating capacitor needs a certain...
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    Closed: Re: Not enough IOB of a certain FPGA

    I fear you are reading too much into the problem. Too me it looks like a trivial FPGA exercise, unfortunately compiled with a too small device, e.g. using automatic device selection in ISE. As long...
  10. Closed: Re: How to move metal elements via magnetic waves?

    None of the answers seemed to refer to the requirement to move the metal parts by an apparatus at least 1m apart. This is impossible if we sort out huge supraconducting magnets.
  11. Closed: Re: Response of the TLINE for different frequencies and lengths

    I agree that the relation between electrical length and input impedance are presented correctly in the diagrams. You should be able to see in in a correct simulation setup. Unfortunately you neither...
  12. Closed: Re: Error loop must terminate within 10,000 iterations (vhdl)

    No, Altera/Intel doesn't support textio for memory initialization. But that's not my point. The typical VHDL test bench code starts with a non synthesizable infinite loop and stops with "Simulation...
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    Closed: Re: Replacing AT45DB081B with SST25VF080B

    The chips have different memory organisation and mostly different command sets. Although you can find access methods common to both devices, It's unlikely that a code written for 45xx81 will support...
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    Closed: Re: Rotary capacitor physics and design

    Maybe an ambiguousity of the term air gap, I mean air actually. I'm assuming that the space between electrode plates won't be completely filled with dielectric, there's always an air gap between...
  15. Closed: Re: Error loop must terminate within 10,000 iterations (vhdl)

    We can surely discuss how to write synthesizable memory initialization. But this is pure test bench code.
  16. Closed: Re: Best Solution to use DOT POINT by REVERSING 3rd. one Digit of 4-digit seven segme

    Why not simply rewire the segments instead of writing software?
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    Closed: Re: Rotary capacitor physics and design

    1 mm air gap? As a starting point, did you calculate the total effective Er of a combination of Er=1 and Er=1k or even 1000k?
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    Closed: Re: pulse width stretching

    You never mentioned IC design, just designing a circuit. I asked about the intended technology but the question wasn"t answered. It was obvious to me that the discussed implementation with 100 ms RC...
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    Closed: Re: pulse width stretching

    There's no problem with longer pulses, you seem not to understand the circuit operation. Suggest to perform a simulation. Please report if you see problems with it.
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    Closed: Re: pulse width stretching

    The RC delay solution has the problem that the extension time reduced for short negative pulses because the capacitor isn't fully discharged. This can be handled by a diode across the resistor.
    ...
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    Closed: Re: Rational Approximation of Gaussian LPF

    Nuhertz Filter Solutions does a good approximation, slightly lower pole pair Q than Bessel, unfortunately I have no access right now.
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    Closed: Re: Rotary capacitor physics and design

    I don't think that rotating variable capacitor with high Er is feasible. The capacitance would be more defined by the unavoidable air gap than the dielectric. We have low Er ceramic trimmer...
  23. Closed: Re: Audio amplifier on PCB error. Ports of opAmp shorted.Can't find the reason why?

    High speed and power OPs without bypass capacitors are likely to self-oscillate. Also floating inputs may cause problems. You can e.g. connect the unused channel as voltage follower, out to vin-,...
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    Closed: Re: Shortcircuit protection circuit

    My apology for continuing a discussion that should be better carried on in the About Edaboard section.

    The "time to edit" limit was reduced to 30 minutes 5 years ago, there was no reservation...
  25. Closed: Re: Modulation scheme of this pulsed/two-frequency radar system

    I think, without some quantitative information, e.g. carrier frequencies, pulse width, transmitter rise time and receiver time resolution, it's impossible to guess about the purpose and measurement...
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