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  1. Closed: Re: How to convert CMRR in DB to Numerical Value

    90 dB = 20 * log(voltage_ratio)
    =>
    voltage_ratio = 10^(90/20) = 31623

    The output will change max 1/31623 of the input common mode change. In this case about 32uV/V


    You can also get this...
  2. Closed: Re: Resistance of component bag made of "reddish" ESD plastic?

    Watch the ESD bag/mat videos by Dave Jones:

    https://www.youtube.com/watch?v=imdtXcnywb8 EEVblog #247 - Anti Static Bag Myth Revisted
    https://www.youtube.com/watch?v=7FFrZl9ymFw EEVblog #250 -...
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    Closed: Re: Error :Syntax error near "module"

    Maybe you told Vivado that it's a VHDL file?
  4. [SOLVED]Closed: Re: Adding '1' to a std_logic_vector in VHDL

    The TC output is wrong, should be '1' when the counter is "1111" and CET = '1'.
    The parallel load is wrong, should happen when PE = '0', regardless of CEP and CET.
    An unsigned signal will wrap...
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    Closed: Re: adding reset function to D Flip FLOP

    The clock input is inverted on the lower left DFF (DFF3).
    Three samples are used, taken with a half clock cycle interval between the samples.
    With your numbering, no 2 is the oldest sample, no 3 is...
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    Closed: Re: Input impedance of ideal passive mixer

    My guess:

    The mixer W0 is of the switching/sampling type, which means that the switch in W0 is operated at the LO frequency with a 50% duty cycle.
    This means that the current is only 50% of what...
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    437

    Closed: Re: Advice on choosing PCB software

    I have friends that work professionally with KiCad. It is easy to try it, since it's open source and free.
    https://www.kicad-pcb.org/

    If you first learn KiCad, you can then better evaluate the...
  8. Closed: Re: Laptop RAM upgrade (new RAM doesn't work in RVS slot, but works in STD slot)

    I can't explain why the new modules don't work in the RVS slot, but I can explain the STD and RVS markings.

    STD = standard, RVS = reverse.
    It isn't a position marking in the laptop. It is a...
  9. [SOLVED]Closed: Re: Random Led Blinker on DE10-lite FPGA board: [0-7]LED

    Every 5 million clock cycles, you invert a random LED.
    There is no code to switch off a LED when another turns on.

    I think you should post your code in CODE tags instead of attachments.
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    Closed: Re: Understanding Skid Buffer Mechanism

    A transaction is completed when valid and ready have been set in the same clock cycle (= both sampled high simultaneously at the positive clock edge at the end of the clock cycle).

    With a skid...
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    Closed: Re: Understanding Skid Buffer Mechanism

    The timing diagram is wrong. On each interface, a transaction is completed when valid and ready are high in the same clock cycle. In your diagram, this means that d2 is transferred 3 times to the...
  12. Closed: Re: Laptop RAM upgrade (new RAM doesn't work in RVS slot, but works in STD slot)

    It is crazy if such a complicated model number isn't enough to tell if it must be upgraded with DDR3L or DDR4 RAM.
  13. Closed: Re: Displaying the time parameter using Timer interrupt

    In C code, a number beginning with "0" is an octal number. Octal 0123 = Binary 1010011 = Hex 53 = Decimal 83

    0129 is illegal because there is no digit '9' in octal base.


    Wrong:

    ...
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    Closed: Re: Is such goal achiveable - AVR Soft-Core

    Don't change the compiler. Write an assembler function that can be called from C-code.
  15. Closed: Re: Laptop RAM upgrade (new RAM doesn't work in RVS slot, but works in STD slot)

    For the combination that "works" with a new DDR4 module, can the computer see the memory? I doubt it.

    You should get DDR3L SODIMMs instead.
    Your laptop will not take DDR4 modules.
    ...
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    Closed: Re: Is such goal achiveable - AVR Soft-Core

    It is possible, and maybe useful as a training/learning experience.
    Otherwise, I think it is a bad idea. A "simpler" solution is to create a separate "vga terminal/screenbuffer" block and connect it...
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    Closed: Re: Understanding Skid Buffer Mechanism

    For timing/speed, you don't want a combinatorial path from destination/output "ready" going back to the source/input "ready".
    This means that the "ready" going back to the source/input will be...
  18. [SOLVED]Closed: Re: Ultra low-power timer to make a power saving circuit

    For this application, you should not look at the "active" current for MCU's. Some of them have a low power oscillator that can wake the chip from "sleep" after a certain time. The software can then...
  19. Closed: Mean Well advertisement blocks the whole page

    Sometimes the ad is on both sides and the page works.
    Sometimes the ad is in the middle and nothing works. If I reload the page repeatedly, the page will work after a few tries.
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    Closed: Re: Issues with driving 16x2 LCD

    You delay 500 us but only 500 ns is necessary.

    You should probably also have the delay after setting LCD_EN = 0
    In several places you set LCD_EN = 1 again with no delay.
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    Closed: Re: Off-line Power factor correction

    I agree with Easy peasy.

    The transfer function changes between DCM and CCM, so it is much more difficult to make the regulator loop if both modes are allowed.
    I think it could be possible with a...
  22. Closed: Re: Old capacitor needs replacing not sure what to replace with.

    The small capacitor is 0.005 uF = 5 nF, so 4.7 nF should be a good replacement.

    It must be of type "Y" for safety reasons.
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    Closed: Re: Linux Command to Copy Multiple Files?

    The file names will be exactly as in the "destination_file_list.txt".

    If the file names in the list don't have the .docx extension, you can add it with the "sed" command:


    cat...
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    Closed: Re: Quartus error 12006 'undefined entity'

    What device are you using?
    Are both clock buffer outputs connected to physical pins on the device?
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    Closed: Re: Linux Command to Copy Multiple Files?

    If there is no path in the destination file names, they should go to the current directory.
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