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Author Topic: Voltage Follower  (Read 4883 times)

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methos

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Voltage Follower
« on: March 28, 2008, 12:39:56 PM »
I was looking some op amp circuits.
I came up to a voltage follower circuit. What exactly is a voltage follower?
What does?

Andre

  • Guest
Re: Voltage Follower
« Reply #1 on: March 31, 2008, 22:24:35 PM »
The voltage follower is nothing more than a buffer for hight impendance circuit to low impedance like a speaker. The speaker would have for example 4 8 or 16 ohm, very low impedance. If you connect directly a transistor (as an amplifier) to this circuit, even if this amplifier has gain of 100, you will hear nothing. You have to buffer it first.

methos

  • Guest
Re: Voltage Follower
« Reply #2 on: April 01, 2008, 08:55:24 AM »
It changes the amperage? I still do not get it.  :(

kam

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Re: Voltage Follower
« Reply #3 on: April 01, 2008, 23:18:57 PM »
No it does only what andre posted. Is like a coupling.

methos

  • Guest
Re: Voltage Follower
« Reply #4 on: April 03, 2008, 19:25:35 PM »
oh, i see :-\