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Basic Electronics » Phase Shifter or time delay circuit?

November 25, 2011
by lcruz007
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Hi,

An input non-periodical signal starts when the circuit is powered on, BUT after some few milliseconds I want the output signal to be shifted in its phase at least 2PI (one full cycle), or have a sort of timer that outputs the signal a few milliseconds after.

How can I achieve this? Is there any type of a time-delay circuit with op-amps? I saw one but it only shifted the wave 180 degrees, it doesn't work for me, as I have analyze a full cycle first and then manipulate the shifted signal.

Something like this (e.g):

Signal [channel 1 to oscilloscope] -> Delay[500ms] -> The exact signal [channel 2 of osccilloscope], but starting 500ms after the circuit was powered on.

November 25, 2011
by lcruz007
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By the way, it is an analogue signal.

November 26, 2011
by 6ofhalfdozen
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I am not sure if it will do what you want, but there are several ways to set up a 555/556 to do time delay and inversion. While the 555/556 is digital, you can use it to gate/control a transistor. You might be able to put op amps in there, but I don't see a way to do it. Just a thought, hopefully it helps..

December 09, 2011
by BobaMosfet
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lcruz-

Is this an AC signal, or just an analog wave-form (never below ground)?

BM

December 09, 2011
by mongo
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Delay line

December 09, 2011
by GeeBob
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So what is the highest frequency of interest? If you digitize any signal you have to think about Nyquist/Shannon theorum. You could use the weakness (phase shift)of hardware filters to do this for you. What would be a cycle of a non-periodic waveform and how do you define it?

December 23, 2011
by BobaMosfet
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In reviewing this, the answer becomes clear from what the op requested- doesn't matter frequency or signal type- it's a non-periodic waveform, anyway.

Simply buffer the input waveform and analyze it. Once it's analyzed, output the buffer.

BM

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