can anyone help me in designing oscillators

[Reymel S. Arizala]

we need to design a wein bridge oscillator, with an output frequency of 800khz and Vp 0f 10V.. can anyone suggest for the best op amp to use in the design

 

[Kefali]

It's spelt "Wien Bridge". If you search for that you should find some designs.

 

[LvW]

we need to design a wein bridge oscillator, with an output frequency of 800khz and Vp 0f 10V.. can anyone suggest for the best op amp to use in the design

Pretty high requirements (bandwidth and slew rate).
Most probably, a current-feedback amplifier (CFA) with a bandwidth of several 10th of MHz will be necessary.

 

[Reymel S. Arizala]

sir can you suggest modification in the design..

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sir can you suggest modification in the design..

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sorry for miss spell

 

[LvW]

Why modification?
Which kind of modification?
It looks good, for my opinion.

 

[Reymel S. Arizala]

in my computation, the value is not like that, i adjusted the values of the resistors..is it okay?

 

[PA4TIM]

https://readingjimwilliams.blogspot.nl/2011/09/app-note-43-part-2.html Downolad appnote 43 from Jim Williams. He builds some great wien bridge oscillators. I just build a version based on his ideas.

 

[LvW]

in my computation, the value is not like that, i adjusted the values of the resistors..is it okay?

For current-feedback amplifiers, the feedback resistor Rf determines stability and optimum performance.
For a gain of +3 the optimum value is approx. Rf=500...1000 ohms (see data sheet).
Thus, I recommend to change all resistors in the feedback path to corresponding lower values.
It is to be expected that, in this case, theoretical and practical values will come much closer.