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Recent content by EDA_hg81

  1. E

    The reason of Verilog signed math calculation error

    I found out the solution to fix above problem is to break math into steps instead of putting all equation into one line.
  2. E

    The reason of Verilog signed math calculation error

    I am using Microchip Libero SOC to process the incoming data using Verilog. But I found out the Verilog signed math operation is not correct, such as "01a114" + "ff6a1d" should = 010b31, but the result is "000b31" Please let me know how to fix this problem. Many thanks in advance.
  3. E

    The question for Verilog math question

    Please help for the following Verilog problem. I am writing the Butterfly combination math function of FFT. The problem I am meeting is the FFT result array is skipped every two space. Please let me know any protentional reasons for my problems. Many thanks in advance.
  4. E

    [SOLVED] Please help for Data transferring between Verilog Modules

    Any helps for the following Verilog coding are appreciated. Pulsewidth module is instantiated in top_pll module and the data port will be transferred from pulsewidth module to top_pll module for further processing. I have defined the data port in pulsewidth module with r_count_hi (define as...
  5. E

    PLZ help with this switching circuit

    Sincere thanks for your answers. I originally plan to use 74ACT04 since it has higher output current but there is no model for 74ACT04 in TINA so I have to use 74HCT04 model instead. If it is possible would you show your simplified level shift circuit? One more question: When T3 is connected...
  6. E

    PLZ help with this switching circuit

    I try using this circuit to switch 0.2V and 0V to output. The first NPN and PNP for realizing the control level shift to compensate the Vbe of second PNP. How do you think this circuit? I have run TINA and it can work but not sure if it still can work in real world. Many thanks in advance.
  7. E

    How to build a analog flip flop

    the divided clock should be -2V to +3V too. Thank you all for your help.
  8. E

    How to build a analog flip flop

    Please let me know the transistor flip-flop. I want to find a good quality analog flip flop. Thank you so much.
  9. E

    How to build a analog flip flop

    I have a 50MHZ analog clock signal from -2V to +3V. I want to use analog flip flop to generate 25MHZ 50% duty cycle clock. How I can do it? Thanks.
  10. E

    why need those 10K resistors to reduce input impedance?

    You mean those 10K resistors are for making smooth edge? Thank you for your answers. ---------- Post added at 13:43 ---------- Previous post was at 13:42 ---------- Just like High pass filter?
  11. E

    why need those 10K resistors to reduce input impedance?

    The ISL59441 has input buffer but why need those 10K resistors to reduce input impedance? Thank you for your answers.
  12. E

    Mosfet swing voltage problem, please help

    I used the structure in attached image to generate voltage swing from +5V to -5V. But why the simulation results can not reach +5V and -5V. Which parameters determinate the voltage swing, is it Darin to Source voltage? Many thanks.
  13. E

    Please help with this power supply design

    I really don't know there has variable zener. Many my sincere thanks.
  14. E

    Please help with this power supply design

    It has to be a positive power supply that has variable output 2v to 15v and but can sink up to 2A It is hard to find one meet this requirements. Thanks.
  15. E

    Please help with this power supply design

    This power supply needs +2V to +15V adjustable DC voltage output and also requires 2A current sink ability. Thanks for any ideas.
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