Voltage follower - OPAMP

Discussion in 'Homework Help' started by xxxyyyba, Oct 12, 2015.

  1. xxxyyyba

    Thread Starter Active Member

    Aug 7, 2012
    279
    6
    It is well known that Voltage Follower (Buffer Amplifier) can be used to connect high resistance voltage source to load. We are limited with output opamp current, so there is limited range of resistances we can connect at output. Can we modify circuit on some way to expand this range?
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    4,166
    1,188
    xxxyyyba likes this.
  3. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,451
    1,070
    First, look at the opamp's data sheet for max source and sink current at specified Vol and Voh.

    You can buy special opamps that can source and sink up to several Amps.
     
    xxxyyyba likes this.
  4. OBW0549

    Well-Known Member

    Mar 2, 2015
    1,769
    1,443
    xxxyyyba likes this.
  5. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,451
    1,070
  6. WBahn

    Moderator

    Mar 31, 2012
    20,057
    5,644
    This sounds like it is directly a homework problem, especially starting off with something like, "It is well known that ...." Now that's perfectly fine, but ideally, you should have thrown out your thoughts on what the answer might be. Of course, in this case you were saved that whole part of the process since someone answered your homework question for you.
     
Loading...