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Recent content by el00

  1. E

    interfacing 8 channels ADC with micro

    ok, but why not CoM's (Computer on Module)?
  2. E

    interfacing 8 channels ADC with micro

    Klaus, nothing personal. I did not feel offended. I was only trying to clarify that the focus of the post was not about what ADC to adopt, but about how to interface it in order to get a data stream. In any case the data must be handled in 32-bit chunks, both with 24 and 32 bits. The main...
  3. E

    interfacing 8 channels ADC with micro

    Klaus, thank you for your reply. I never mentioned 32 bit in fact, I know very well that they are useless. However, between 16 and 24 bits, I have enough experience in analog design to take advantage from the difference, and I have already designed systems with 24 bits that go beyond the limits...
  4. E

    interfacing 8 channels ADC with micro

    Hello, I need to interface a high end 8 channels ADC to a microprocessor or microcontroller. The candidates are ADS1278, CS5368, AD7768, AK5558VN. I know how to handle all the part related to the analog, power etc. I would like to interface with something that can handle the data, stream them...
  5. E

    debugging RGMII interface

    Hello, I developed a board with an FPGA and a 1GB PHY. The 1GB autonegotiation is OK, and the board is only transmitting data in streaming, there is no need to receive in this application. The stack is not a standard TCP one, but it is a reduced customized stack that only sends packets blindly...
  6. E

    full bridge class D dead times, symmetrical?

    Hello I have designed half bridge many times, but never a full bridge. I understand how to handle dead times with half bridge, and I know I can use 2 half bridge driving them with the same PWM signal, negated on the second half bridge, to obtain a full bridge. But, in order to build a highly...
  7. E

    cannot read .pcb file

    Ok thanks. Unfortunately, to import into Altium, it seems that the PCB must be converted into PADS ASCII format first, but I do not have PADS.
  8. E

    cannot read .pcb file

    Hello, I have downloaded LTM4644 reference design from Analog https://www.analog.com/media/en/reference-design-documentation/design-integration-files/DC1900A.zip I have a license of Altium Designer, and Allegro viewer. While I can open the .DSN file and view it from Allegro viewer (so it seems...
  9. E

    analog high pass filter > 8 poles

    ok... I think I need some time to digest this! Thanks to all of you for the many contributions. Much appreciated.
  10. E

    analog high pass filter > 8 poles

    Sorry for replying after such a long time, but I have been traveling and I had some issue so that I could not connect. I do not necessarily need tchebycheff filter, I can use also other types, however, I was just hoping to see an implementation of a 10 poles (or more). I could not find any...
  11. E

    analog high pass filter > 8 poles

    Unfortunately I need at least 90dB/octave, perhaps a bit more. 80 is not enough. How do I implement 9 or 10th order? I have never seen an implementation
  12. E

    analog high pass filter > 8 poles

    I need to have a stopband around 2kHz (to be defined exactly), and a falloff of ~90dB/octave. Ripple is acceptable, this is not a problem. Yes I thought about elliptical filter, but I could not find any implementation with such a steep falloff.
  13. E

    analog high pass filter > 8 poles

    I have no problem In cascading filters, but I do not think I can cascade 2 x 8 poles filters. I don't think it works
  14. E

    analog high pass filter > 8 poles

    Hello I need to build an analog high pass filter with a very steep response. Chebyshev 8 poles filter is not enough. I cannot use digital filters in this application. Unfortunately all the tables available do not go beyond 8 poles. Switched capacitors filters are a bit noisy, but I do not...
  15. E

    measuring class D efficiency

    As it is a pulsed system, and the output is closed on a resistor, by recording the voltage on the scope I can obtain the current, so the output power is easy to obtain, until I am driving a resistive load. For the input, since the pulse is very short, the power supply is not fast enough in...

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