AC level shifter

Discussion in 'The Projects Forum' started by isne14a69, Jul 27, 2010.

  1. isne14a69

    Thread Starter New Member

    Jul 27, 2010
    2
    0
    Hi everyone,

    What is the simplest way to create an AC voltage level shifter which will shift a 0-10V P-P signal down to +/-5V P-P? The frequencies I'm working with are from about 100Hz to 3KHz.

    I would like to avoid using a negative supply if possible, but will if it is necessary.
     
  2. tom66

    Senior Member

    May 9, 2009
    2,613
    214
    Use a capacitor. The capacitor removes the DC offset and produces an AC output. Adjust the capacitor to get the required frequency response. I recommend 100nF to start off with. The capacitor must be rated for at least the Vp-p, I think.

    It's important to note that the capacitor will attenuate the signal slightly.

    EDIT: Added image.
     
  3. isne14a69

    Thread Starter New Member

    Jul 27, 2010
    2
    0
    Thanks Tom. I will give this a try first thing in the morning.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    Just be aware that it only works for waveforms with 50% duty cycle, like sine waves and square waves.
     
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