Hi all, i've been trying to make a sine wave oscillator of 450KHz freq..... i used the circuit attached bt i think TL072 isnt appropriate for this.... plz suggest me a op amp that could produce a 450KHz sine.... thanks


Note: i havent attched the gain stabilizing diodes etc in the circuit cz its working just fine without them so i thought y put oneself in mess....

 

Hello,

I think the gain-bandwith product is to low (4 Mhz ).
Did you try the LF357 , that has a gain-bandwith product of 20 Mhz ?

Greetings,
Bertus

 

I was thinking a bit higher bandwidth than that.
You might try an LM6152 (75MHz) or LMH6642 (130MHz).

But if you're trying to use a breadboard, you probably won't have much luck. Breadboards have capacitance between the various interconnecting strips, which makes high frequency circuits tough to breadboard. You might be better off building the circuit on a small copper-clad board "dead-bug" style.
http://www.dummies.com/how-to/content/building-a-circuit-deadbug-style.html

 

thanks people, i didnt find LM6152 and LMH6642 in the local market.....

bt i did get LF357.... thanks for the advice..... i'll try and post the results....