741 comparator - help

I have a triangle wave input (10 Vpp) and a reference voltage of 5 V. The output square wave should look something like this:
**broken link removed**

I haven't found any simple instructions on how to go about making this but it should be a simple thing. My simulation is in the attached picture.

So the output is not aligned properly with the input... I tried to mess around with the resistors but it didn't do much.
Any hints would be greatly appreciated.

E: The frequence is 1 kHz.

One problem I see is you are sampling into the inverting input so your square wave will be upside down, 180 degrees out of phase.

asdad said:

I have a triangle wave input (10 Vpp) and a reference voltage of 5 V. The output square wave should look something like this:
**broken link removed**

I haven't found any simple instructions on how to go about making this but it should be a simple thing. My simulation is in the attached picture.

So the output is not aligned properly with the input... I tried to mess around with the resistors but it didn't do much.
Any hints would be greatly appreciated.

Click to expand...

hi,
Whats the frequency of the triangular waveform.??

asdad said:

I have a triangle wave input (10 Vpp) and a reference voltage of 5 V. The output square wave should look something like this:

Click to expand...

The following circuit should work. Without the MOSFET, the output cannot swing to both rails due to the saturation characteristic of 741 output stage.

Okay, I changed it to non-inverting, added a third resistor and adjusted all the resistors. Works great now. Thanks!

If you have the time/patience would you please post the final circuit?
I'd like to know where the new resistor is, etc.

Sure.

There's some rise/fall time but it does its job.