how can convert input sinusoidal wave to output square wave?

 

Hello,

Take a look in the AAC eBook on positive feedback.
http://www.allaboutcircuits.com/vol_3/chpt_8/12.html

Greetings,
Bertus

 

how can convert input sinusoidal wave to output square wave?

Let me count the ways:

Schmitt Trigger
Comparator
Overdriven amplifier
Threshold driven flip flop
Clipper/differentiator/bistable multivibrator
Odd harmonic multiplier/adder


Shall we continue?

Eric

 

Let me count the ways:

Schmitt Trigger
Comparator
Overdriven amplifier
Threshold driven flip flop
Clipper/differentiator/bistable multivibrator
Odd harmonic multiplier/adder


Shall we continue?

Eric

However, probably the simplest and cleanest would be a simple comparator.

 

However, probably the simplest and cleanest would be a simple comparator.

Certainly is, see the e-book for an example: http://www.allaboutcircuits.com/vol_3/chpt_8/3.html

Dave

 

i forgot to mention that i should use diode circuit only

 

Then that would be http://www.allaboutcircuits.com/vol_3/chpt_3/6.html

 

Thank you Bill Marsden for your reply
but the final output has some slope. i need exactly square wave.

 

Then you can't use diodes. You want exact, it needs to be active (ie, gain).

Diodes clip the top and bottom off. You'll find all square waves have some slope, it is a function of frequency response. The actual term is slew rate.

 

Then you can't use diodes. You want exact, it needs to be active (ie, gain).

Diodes clip the top and bottom off. You'll find all square waves have some slope, it is a function of frequency response. The actual term is slew rate.

You can get a little sharper edges with Zener diodes, but they still aren't perfect....and they tend to be slow.