Connect with us

class b amplifier components

Reply to Thread

Discussion in 'Electronics Homework Help' started by pietervdb, Apr 5, 2018.

Scroll to continue with content
  1. Apr 5, 2018 #1
    pietervdb

    pietervdb

    1
    0
    Apr 5, 2018
    I want to design a class b amplifier and test it with a 100 ohm speaker. I gonna use a vcc of 15V. I want to get a db of 40 but I don't know how I should choose/calculate the capacitors/resistors.
    [​IMG]
     
  2. Apr 5, 2018 #2
    Audioguru

    Audioguru

    3,087
    692
    Sep 24, 2016
    Your amplifier is class-AB, not class-B. It is the output stage of an audio amplifier using emitter-followers that have no voltage gain, the gain is a little less than 1. You need a third and probably a fourth transistors to provide the voltage gain of a little more than 100 (40dB) that you want. Usually your two R2's are diodes for temperature control of the current. Nobody makes a 100 ohm speaker, they are usually 8 ohms.

    Here is an audio amplifier that has the diodes I mentioned and its Q1 provides its voltage gain:
     

    Attached Files:

    hevans1944 likes this.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads

  1. Class A Amplifier design!!!!

  2. Help designing class A amplifier.

  3. class C bias question

  4. seemingly impossible class project

  5. Class problem help (Converter U-I)

  6. No one in my class can figure this out!

  7. how to find voltage across following components

  8. Want to answer a few questions for my technical writing class?

Loading...
Electronics Point Logo
Continue to site
Quote of the day

“”

-