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Type: Posts; User: flote21

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  1. Closed: Temperature strange problem with a switching regulator

    Hello guys! I am wondering about the next issue:

    I have used the next part of Monolithic Power to design the first stage of my power supply tree: MPQ4470A. Here you can see the schematic design of...
  2. Closed: Re: Possible Signal Integrity problem in a 100MHZ CLK

    Hi,

    Today I did the same measure with another oscilloscope: 500MHz of Bandwith and I have seen the same waveform....
  3. Closed: Re: Possible Signal Integrity problem in a 100MHZ CLK

    totally understood. I need a faster OC to see a perfect square signal. But what about the offser? Why is it having a 1.8V offset? It is also because the OC is very slow to sample that signal?
    ...
  4. Closed: Re: Possible Signal Integrity problem in a 100MHZ CLK

    Ok. Maybe it was with other model of oscilloscope. But I checked a 80MHz signal with this one I have observed the same attenuation and the same Offset as the 100MHz signal... what do you think about...
  5. Closed: Re: Possible Signal Integrity problem in a 100MHZ CLK

    Hi! Thanks for your answer. There is a 0hm series termination resistor, and the Trace is routed with Zo=50ohm. I tested a 47ohm series termination and the waveform almost doesn't change.
    On the...
  6. Closed: Possible Signal Integrity problem in a 100MHZ CLK

    Hello guys,

    I am wondering about a signal integrity issue with a 100MHz clk generated by an FPGA.

    This is the set up:

    - FPGA generates a 100MHZ square signal with 50% of duty cycle.
    - The...
  7. Closed: Re: Delayed one-shot IC with nanoseconds resolution

    This one is exactly what I am looking for:

    http://www.datadelay.com/datasheets/1503.pdf

    But I need one which works with 0-15V digitals pulses...

    Greetings.
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    Closed: Housing design company

    Hello folks,
    I am wondering if there is some company in Europe specialized in case or housing design for PCBs or product electronics which can do a thermal study of the electronics and give us...
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    Closed: Re: Increase output voltage of a clk buffer

    Well I have to control three IGBT driver board with my prototype board. Every IGBT driver board is powered with +15V. And the control signals used to switch the IGBT top and the IGBT bottom are in...
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    Closed: Re: Increase output voltage of a clk buffer

    Hi!
    The TI comparator looks pretty interesting but I need 15V at high level.

    The application is to buffer the PWM of an IGBT dirver. I don't need high current because the dirver itself is...
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    Closed: Increase output voltage of a clk buffer

    Hello folks!
    I wanted to use the ICS551 clock driver to switch some drivers which are working in the range of 0-15V. The maximum working voltage of the ICS551 is 5V. So I need to do a voltage...
  12. Closed: Delayed one-shot IC with nanoseconds resolution

    Hello guys!

    I am wondering if there is some part in the market like LTC6994 but with nanoseconds resolution....I need to set pulse delays in the range from 1 ns to 20 ns....

    If there is not any...
  13. Closed: Re: How to simulate bidirectional signal in LTSPICE

    Hi!

    The Trigger-Schimitt buffer only switch between 0-1V (digital logic simulation in LTSpice). In a real life they should switch between 0-3.3V and the resistor divider is to reduce the maximum...
  14. Closed: Re: How to simulate bidirectional signal in LTSPICE

    Hi BradTheRad,

    I have already tested several combination of resistors and as far as I place resistors at the collector of every BJT, I am not able to reach the desired levels of the pulses...So I...
  15. Closed: Re: How to simulate bidirectional signal in LTSPICE

    Hi FvM!

    Thanks for the clarification. However I need to have both pulses at the output of the trigger-schmitt buffers. For example, if place two 1k resistors at the colector of every BJT you can...
  16. Closed: How to simulate bidirectional signal in LTSPICE

    Hello guys!

    I am trying to simulate the next circuit in LTSPICE:

    147998

    I was expecting to see something like this:

    147999
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    Closed: Xilinx SoC Zynq 7020 + Flash problema

    Hello folks,

    I have designed a customized PCB board based on the evaluation kit ZC7020 of Xilinx. And I am having issued to run the Flash with the preescaler x2 (maximum speed) in my customized...
  18. Closed: Re: Increasing the output current of a Waveform signal generator.

    Hi it is a quick test with minimum performance. I just need to give more current to the input sinus signal using a pre-stage circuit to have an output signal with the same amplitude but stronger. I...
  19. Closed: Increasing the output current of a Waveform signal generator.

    Hello guys,

    I am using a waveform signal generator to generate a sinus test signal and test a signal conditioning circuit:
    ...
  20. Closed: Re: DCDC converter with Vin=24V/6A and Vout=24V(regulated)/0.5A

    Totally agree but my question is if a DCDC converter with an output +-24V/+-150mA will be able to supply the supposed case you said: 230mA
  21. Closed: Re: DCDC converter with Vin=24V/6A and Vout=24V(regulated)/0.5A

    Hi KlauST!

    Thanks for your quick reply, do you have in mind other manufacturers like TracoPower? I have been cheking Intersil, Maximm, WE, Murata, etc and I was not able to find DCDC converters...
  22. Closed: DCDC converter with Vin=24V/6A and Vout=24V(regulated)/0.5A

    Hello folks,

    I am wondering about a commercial DCDC converter which is able to output regulared +-24V/0.5A (At least) with a Vin=24V. I have been thinking on the next part, but it is very...
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    Closed: Re: What to do with Unused comparator OpAmps?

    Hi KlausST,

    when you mean three resistor solution is this kind of solution:

    147133


    thanks
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    Closed: Analog test point proper termination rule

    Hello buddies!

    I have been wondering when one of my colleagues told me that he always place a series termination of 4.7kOhm in every electrical test point of the board in order to protect in any...
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    Closed: Re: What to do with Unused comparator OpAmps?

    Great! everyhing is clear now. I would tie with a series 10k resistor the Vin(+) to Vcc and the Vin(-) to -Vcc and the output floating. Greetings
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