sine wave generation in op amp

How we generate the 50Hz sine wave using op amp and also this sine wave should be varied 0-50Hz . .any one help me to do this?

there are a few different circuits such as the bubba oscillator or wien bridge among a few others you can use to get your desired frequency. Have a read up on them to calculate values of compoents to get frequency value

renikanna said:

How we generate the 50Hz sine wave using op amp and also this sine wave should be varied 0-50Hz . .any one help me to do this?

Click to expand...

At first, you should know that tuning of an oscillator frequency requires (in most cases) a simultaneous variation of two resitors or two capacitors,
Secondly, tuning down to "0 Hz" or even only down to several Hz is problematic because such low frequencies require very large time constants (resp. large capacitors with high quality).

charlon833 said:

there are a few different circuits such as the bubba oscillator or wien bridge among a few others you can use to get your desired frequency. Have a read up on them to calculate values of compoents to get frequency value

Click to expand...

am using wein bridge oscillator i get 50Hz but it not varien i get only fixed sine wave

renikanna said:

am using wein bridge oscillator i get 50Hz but it not varien i get only fixed sine wave

Click to expand...

As mentioned - you must use a double potentiometer or a double vari-cap.