dc insertion

Discussion in 'Homework Help' started by swty_todd, Apr 5, 2009.

  1. swty_todd

    Thread Starter Active Member

    Aug 3, 2008
    Op-amps designed to operate from a single power supply employ a dc insertion technique. My textbook says that it is to obtain a maximum undistorted symmetrical sine wave. What does this mean?
  2. Audioguru

    New Member

    Dec 20, 2007
    I never heard of "DC insertion Technique".
    Any opamp works from a single supply voltage if its input is biased at half the supply voltage and the input and output are capacitively coupled.
    Since the input is at half the supply voltage then the output of the opamp will also be at half the supply voltage can swing up and down equally.
  3. mik3

    Senior Member

    Feb 4, 2008
    It means that you have to bias the op amp as to output about half the supply voltage when no input signal presents. This is to achieve the maximum output voltage and a symmetrical waveform.