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  • Users: D101
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  1. D101

    Voltage controlled resistor or low pass

    Hi Can any one help I want to make a voltage controlled resistor or a voltage controlled low pass filter. Many Thanks
  2. D101

    Phase Detection

    Hi I have a 5v sine wave the frequency can be varied between 20kHz and 130kHz I need to detect zero crossing and 90 degree's Can anyone help Many thanks David

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