« previous next »
Pages: [1]   Go Down

Author Topic: what does the capacitor do  (Read 2263 times)

0 Members and 1 Guest are viewing this topic.

Offline amateur_25Topic starter

  • Regular Contributor
  • *
  • Posts: 106
what does the capacitor do
« on: April 12, 2014, 10:24:34 pm »
I'm trying to build a pre amplifier for my raspberry pi. I've been looking into amplifiers.
In the designs I've studied they always have a capacitor in series with the input. Is this just what is called a blocking capacitor? So it's used to remove the dc component away from the audio signal right?
http://www.google.co.uk/imgres?imgurl=http%3A%2F%2Fwww.sentex.ca%2F~mec1995%2Ftutorial%2Fxtor%2Fxtor4%2F4xtor4.gif&imgrefurl=http%3A%2F%2Fwww.sentex.ca%2F~mec1995%2Ftutorial%2Fxtor%2Fxtor4%2Fxtor4.html&h=335&w=292&tbnid=frTBLO45_EWs5M%3A&zoom=1&docid=bw4w2YNQpXB49M&ei=cbxJU--PJKjb0QWn3YCoBA&tbm=isch&ved=0CGIQhBwwBA&iact=rc&dur=488&page=1&start=0&ndsp=33
Logged
 

Online mariush

  • Super Contributor
  • ***
  • Posts: 5022
  • Country: ro
  • .
Re: what does the capacitor do
« Reply #1 on: April 12, 2014, 10:58:38 pm »
See the following video, from about 6:00 :



Maybe it will help.  Basically yes, it has to do with blocking dc signal.
Logged
 

Offline amateur_25Topic starter

  • Regular Contributor
  • *
  • Posts: 106
Re: what does the capacitor do
« Reply #2 on: April 13, 2014, 09:50:21 am »
 :wtf: am right for once. I must be learning a thing or two. About time after spending so much time and money on electronics.
Logged
 

Offline electronics man

  • Frequent Contributor
  • **
  • Posts: 686
  • Country: gb
Re: what does the capacitor do
« Reply #3 on: April 13, 2014, 10:10:08 am »
It's called AC coupling
Logged
follow me on twitter @get_your_byte
 
Pages: [1]   Go Up
« previous next »

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf

 


EEVblog Main Site EEVblog on Youtube EEVblog on Twitter EEVblog on Facebook EEVblog on Odysee