DC Bias circuits

Discussion in 'Homework Help' started by Xander, Feb 28, 2007.

  1. Xander

    Thread Starter New Member

    Dec 13, 2005
    I read through the AAC article at http://www.allaboutcircuits.com/vol_3/chpt_4/8.html to help me with a question but it seems i am at a loose end. The question asks me to give 3 examples of how DC Bias may be applied to a transistor circuit, but i dont quiet get what it is asking for? It requests to use diagrams.

    Does anyone know what it means and where i could read up on what it is asking for?
  2. Papabravo


    Feb 24, 2006
    Another word for bias is offset. We do this to amplifiers running from a single supply so there will be room for the AC signal to go positive from the bias point and negative from the bias point and still be within the linear range of the transistor or other device. If we did not do this then our output would be severly distorted when the transistor went into saturation or cutoff as the input signal varied over its normal range.

    The different ways of biasing a transistor have names like "Collector Feedback" and "Voltage Divider" which are intended as memory aids to describe the topology of the circut.