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Recent content by Zeinabenaz

  1. Z

    How to improve settling time in a low pass filter

    Imporve settling time in low pass filter hi can someone analyze this circuit for me? you can see in https://www.ti.com/lit/an/sboa011/sboa011.pdf I think the 10kohm resistor must be short circuit with diode when it is on and charged time and cutoff frequency must be changed(tua=Ron*c Ron is...
  2. Z

    change hysteresis in schmitt trigger circiut

    Hi I use this circuit for detection a sensor .my sensor is like a variable resistor but I'm not designer of this circuit ,I must solve just this problem and it is a attractive for myself why I have this problem I hope to solve the problem instead of change the design thanks for your collaboration
  3. Z

    change hysteresis in schmitt trigger circiut

    hi Please explain more about the reasons for the changes you gave? thk :)
  4. Z

    change hysteresis in schmitt trigger circiut

    hi dear Klaus I can not understand why you say I must change R4 value , this resistant value depend to UTP ?
  5. Z

    change hysteresis in schmitt trigger circiut

    hi I think I could not say my question correctly my supply voltage is 14v when I reduce Rpot form 1k to zero my relay change state in Rpot=275 ohm and when increase Rpot form 275 to high relay is off in Rpot=500 ohm but when I reduce 470 ohm to low relay is ON , I think the diode is ON -->Q1...
  6. Z

    change hysteresis in schmitt trigger circiut

    hi someone can help me to analysis this circuit? when Rpot is 1k and I start to reduce pot value the relay change condition((ON)) when Rpot= 275ohm and when I increase Rpot relay comeback unchange mode((off)) in 500ohm ,this operation it's okay to me but if I put Rpot = 470 ohm and start to...
  7. Z

    Revision item in schemetic sheet

    I use altium designer 17.1, I want to add revision code in schematic sheet table like date, time,... I can change revision manually from parameter in document option
  8. Z

    Revision item in schemetic sheet

    I have a question about legend table in schematics sheet,I want to use revision in my schematics , I can change manually by parameter in document options ,but I want to set revision automatically like time ,date,folder address ,... How must I do? Thk
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