Comlementary symmetry amplifiers

Discussion in 'Homework Help' started by darylsingh, Oct 11, 2011.

  1. darylsingh

    Thread Starter New Member

    Jul 10, 2011
    I'm being asked to compare the values between a Type I and Type II amplifier, but only given equations for type I amplifier. Can someone tell me what I need to do differently in order to compare?
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    But what do you mean by Type I and Type II ??
    Show as the diagram
  3. darylsingh

    Thread Starter New Member

    Jul 10, 2011
    I've attached the schematics, the only difference I see is in Type I, there's a capacitor separating R1 and R2 and in Type II, R1 and R2 are voltage dividers, which means gain would be less than 1. But what I'm not understanding is how I would start the design to find R1 and R2. Oh also the two transistors are NPN and PNP
  4. Audioguru


    Dec 20, 2007
    You saved your schematics as BMP file types that use a lot of bytes instead of as a compact PNG file type. Then you zipped them. A nuisance.

    The amplifier types are very old and have not been used for many years. Philips used the TYPE I circuit in 1955.
    Both use emitter-follower transistors so both have a voltage gain of a little less than 1.
    The bias resistors for the output transistors are calculated by using Ohm's Law and the beta of the transistors.