Amplifiers circuit help!

Thread Starter

alitex

Joined Mar 5, 2007
139
hi...
i have low voltage almost lower than 1V (0.1 step) and i want to amplify this signal between 3 to 5V so what is the best circuit for amplify the voltage due
thanks alot
 

mik3

Joined Feb 4, 2008
4,843
An op amp circuit configured as non-inverting amplifier. What kind of signal is it? What is its frequency?
 

Thread Starter

alitex

Joined Mar 5, 2007
139
Hello,

A normal opamp will not manage 28 Mhz.
Take a look at the Intersil EL8102.

Greetings,
Bertus
thanks alot...i think this is what i want.....
but i have some problems with connect 741 amplifier...
i can't take the correct tare of amplify .. i want make G=vo/vi=10 but really i can't take accurate results...
 

bertus

Joined Apr 5, 2008
20,104
Hello,

The 741 is very old. It can just manage 1 Mhz at gain 1.
At gain 10 it will just manage 100 khz, this ia much to low for your application.

Greetings,
Bertus
 

bertus

Joined Apr 5, 2008
20,104
Hello,

In an earlier reply I already adviced the EL8102.
The complete datasheet is with the earlier reply.
This is an opamp with a bandwith of 500 Mhz at gain 1.

Take a look at the gaincurves.



Greetings,
Bertus
 

Attachments

Audioguru

Joined Dec 20, 2007
11,251
The output of a lousy old 741 opamp has trouble with frequencies higher than only 9kHz when the output swing is high. More modern ordinary opamps have a wide output swing up to 100kHz.
 

italo

Joined Nov 20, 2005
205
Hello,

In an earlier reply I already adviced the EL8102.
The complete datasheet is with the earlier reply.
This is an opamp with a bandwith of 500 Mhz at gain 1.

Take a look at the gaincurves.



Greetings,
Bertus
I am looking at them where is the A -Db
 
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