Good day !
I want some information about when the Opamp is configured as a follower.
Thanks and regards.
Well, at what information do you need?
Everything you have .
What in the datasheet are you missing? There is a chapter for electrical specs. If a parameter is not in the datasheet you might file a technical "MyCase" to get it answered by Cypress directly.
What do you want to perform with a PSoC3 opamp?
You can also look into the Family data sheet for the device you are using, its has all the electrical specs.
The datasheet does not contain enough information about the follower. I've reviewed a project that include it and i want to know what is it's purpose.
thanks for help.
The general purpose of a follower is to translate a high Z domain to
a low Z. That is to take a signal that presents itself with a high source
impedance and without loading that signal translate it such that you can
drive other signal chains with the signal, essentially presenting a voltage
(low Z) source for the other signal chains being driven.
Also the voltage follower presents essentially the widest small signal bandwith
for an OpAmp configuration. As well commonly used to drive C loads, although
they must be designed for that purpose, re compensation.
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Thanks to you all.
Dana the link that you put in your reply is not working with me and i didn't understand a word about what you've written so if it is a link that contain simple information or document please attach it here.
Thanks and regards
Here is a book on OpAmps and basic circuit theory, attached.
In simple words:
A "Follower" is an amplifier with a gain of 1.0. So a source that may deliver a voltage at rather low current can be amplified to deliver the same voltage but at higher currents.
A follower can also have a gain = -1. But if you read the
book the abs( DC gain) (configured in a feedback loop) is,
for real OpAmps, always < 1.0000000000000000000000000000000000........
because of finite open loop G effects.
Also not all followers can delivery more current, the classic
Common Emitter / Common Drain when designed for low power