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DIY Stompboxes => Building your own stompbox => Topic started by: ExpAnonColin on January 19, 2004, 12:23:23 AM

Title: Unity gain/voltage follower question...
Post by: ExpAnonColin on January 19, 2004, 12:23:23 AM
So where does the Vbias go?  There's nothing grounded on a voltage follower, just the V- and V+ of the op amp, so how do I trick the op amp into using the ground?  Can I just do ground and not worry about a vbias or is there another special trick?

-Colin
Title: Unity gain/voltage follower question...
Post by: Peter Snowberg on January 19, 2004, 12:37:09 AM
Followers don't use Vbias, unless the follower is AC coupled in which case a Vbias of high impedance is connected to the signal input.

Take care,
-Peter
Title: Unity gain/voltage follower question...
Post by: amz-fx on January 19, 2004, 12:43:39 AM
Colin, look at the way the opamp buffers are configured in my article at:

http://www.muzique.com/lab/buffers.htm

regards, Jack