Square to Sine wave Converter

[saeed_pk]

square wave to sine wave converter

Hi All,
I am Making a function generator i need a circuit based on an OP-AMP that converts square waveform to sine waveform
please help
reply schematic

 

[memarian]

square to sine wave converter

Dear,

please send more information such as frequency range,....

Good Luck.

 

[IanP]

square to sine converter

Use multipole active low-pass filter with 3dB cut-off frequency < 2 x Maximum input frequency of the square wave ..
The output of, for example, 3-pole (or 5-pole) LPF filter should be almost "pure" sine wave ..

Regards,
IanP

 

[PaulHolland]

square wave to sine wave converter circuit

First make from the square wave a triangle wave, using an integrator, than use a LPF (low pass filter) to filter the triangle wave into a sine wave. This is the fastest way to do this !. If you only use a LPF you need more components, since you need to filter more (higher order).

Paul.

 

[safwatonline]

square to sine wave

isnt integrator == LPF

 

[PaulHolland]

triangle to sine wave converter

Partly true... but if he is making an function generator he must have triagle wave first, so take that as a basis to make a sine and NOT a square.

Paul.

 

[venkateshr]

square to sine

R in series tank LC will help as pulsating sq fed to LC circuit will create sine wave.

sq. wave is needed since all practical LC are lossy.


hope u got the ckt. R + (parallel LC grounded) with input sq.wave at R and o/p at R & tank joint.

 

[pixel]

sine wave to square wave converter

First make from the square wave a triangle wave, using an integrator, than use a LPF (low pass filter) to filter the triangle wave into a sine wave. This is the fastest way to do this !. If you only use a LPF you need more components, since you need to filter more (higher order).

Paul.

Just to add:
Filter specifications could be relaxed if you could cut-off with some limiting circuit top and bottom of triangles (i.e to make trapezoids) before filtering, because then you would have less high frequency components.