Which Op-Amp Should You Use: Voltage or Current Amplifier?

[electronic engineer]

in most cases would we prefer voltage op-amp or current op-amp and why?

when to use op-amp as voltage or current amplifier?

thanks in advance

 

[Averagesupernova]

Up until FET inputs on op-amps, ALL op-amps were current input devices. Using resistors in various feedback schemes they are made to act as voltage input devices.

 

[electronic engineer]

ok , i got it now! could you please attach some schemes on both types (voltage and current op-amps)

thanks a lot!

 

[berkeman]

I googled current feedback opamp, and got lots of great hits. The first one is a paper from Texas Instruments contrasting the two topologies:

http://privatewww.essex.ac.uk/~mpthak/Voltage feedback Vs Curr Feedback OPAMP.pdf

 

[electronic engineer]

i've download that file but couldn't be read by my PC , it says that the file is damaged

regards!

 

[berkeman]

i've download that file but couldn't be read by my PC , it says that the file is damaged

regards!

Check to be sure that you are using the latest Acrobat Reader version, and maybe see if any of your other friends can read it okay. Otherwise, just use the original google search to look for similar write-ups. The TI on is especially good though.

 

[electronic engineer]

i have acrobat reader 7.0 ...what did you mean by write-ups could you clarify more, are they other softwares similar to acrobat reader...

many thanks to you!

 

[berkeman]

By write-ups, I just meant some of the other hits on the google search that I mentioned. Best of luck. -Mike-