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Recent content by wayne3

  1. W

    Bi-directional constant current device

    Sorry, I can't reveal too much.Thank you for your reply.
  2. W

    Bi-directional constant current device

    In simple terms, it is to convert the measurement time into the measurement voltage to reduce the ADC sampling requirements.
  3. W

    Bi-directional constant current device

    So, what you mean is, the problem is that the simulated current source is not the ideal current source, right? 1738164826 However, for the simulation, theoretically, both the NPN transistor and the PNP transistor can maintain the same characteristics, and the capacitance size is not within the...
  4. W

    Bi-directional constant current device

    Haha, I'm just wondering about the difference between the two ramps. To some extent, it can be summed up as a question of how capacitance affects the operation of a constant current source.
  5. W

    Bi-directional constant current device

    That‘s a good idea! I re-examined my simulation files and got good results. The purpose of the odd combination of two ramp circuits is to see if the voltages of the two ramp circuits can maintain the same difference between the rising and falling edges, but they can not.Why is this happening...
  6. W

    Bi-directional constant current device

    As shown in the simulation image example, when no capacitor is attached, the circuit is unloaded and can generate a steady current. However, when a capacitor is added, a stable current cannot be generated.
  7. W

    Bi-directional constant current device

    In fact, the purpose of getting an infinite hold time is to get a defined range of capacitor charge and discharge voltages. I wanted the capacitor charge and discharge voltage to change linearly over time, which meant that a stable and consistent current needed to be supplied, but in the actual...
  8. W

    Bi-directional constant current device

    The image below is the ramp generator circuit with an infinite hold time you mentioned earlier.
  9. W

    Bi-directional constant current device

    Sorry, I didn't describe my problem clearly and carefully check my attachments. This is a new add-on that only contains the ramp generator circuit with infinite hold time that you mentioned earlier, but in my simulation results, both the uphill and downhill ramps have some hysteresis, rather...
  10. W

    Bi-directional constant current device

    Thanks for your reply, here is my .asc simulation file.
  11. W

    Bi-directional constant current device

    Hello, since I do not have your contact information, I am sorry to ask you questions here, please forgive me if it may cause any disturbance. I would like to inquire about the simulation of a ramp generator circuit with infinite hold time, I tried the same circuit but couldn't get the same...

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