# how to convert squarewave to 180 deg out of phase?

Discussion in 'General Electronics Chat' started by jerone, Aug 30, 2008.

1. ### jerone Thread Starter Member

Aug 30, 2008
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hi to all. . . im new here and im happy to be a part of this forum.
i encountered a problem with my design today and seeking for help.
please help me how to convert a squarewave to 180 deg out of phase. thanks a lot.

2. ### kubeek AAC Fanatic!

Sep 20, 2005
4,670
804
just invert it.

3. ### jerone Thread Starter Member

Aug 30, 2008
15
0
thanks a lot. hers another one. . . what should i place in my circuit in order to
block my input signal and it will only flow after another + half square wave signal passes.this input signal will reset my another circuit but this signal also depends on the + half square wave. what circuit should i use?

a 555 monostable would do but theres a little problem. output will only be at high after the trigger button's release,not at its first press.

pls help,thanks.

4. ### kubeek AAC Fanatic!

Sep 20, 2005
4,670
804
Not sure what you mean, but that could be an AND gate.

5. ### jerone Thread Starter Member

Aug 30, 2008
15
0
heres the waveform friend. hope you can help me on this.

6. ### jerone Thread Starter Member

Aug 30, 2008
15
0
heres the waveform friend. hope you can help me on this.

7. ### kubeek AAC Fanatic!

Sep 20, 2005
4,670
804
Then you need an edge detector for that.
Is it a part of some digital circuit where clock is involved, or is it analog?
What is the speed of the clock, or the length of the trigger pulse?
What type of load is connected to the circuit that will generate the modified trigger?

8. ### SgtWookie Expert

Jul 17, 2007
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See the attached for a reasonably simple rising edge gate.

You might trigger a monostable 555 timer from an output taken at either point "C" or point "D".

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9. ### kubeek AAC Fanatic!

Sep 20, 2005
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I must say my initial reply was VERY similar, but then I rather asked more questions

10. ### SgtWookie Expert

Jul 17, 2007
22,182
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It did have similarities. However, the circuit I threw together is basically an integrator, with the negative portion clamped by D1. Since there are four Schmitt-trigger NAND gates on a 4093, didn't hurt to use one as an inverter