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Altera_Forum's avatar
Altera_Forum
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17 years ago

Phase modulation

The attached picture shows phase modulation of a clear clock by a sinusoidal signal. Would you plz help me figure out what kind of circuit does this? I know there r generators that can generate ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

The diagram text is wrong. It says sin() but shows a square wave. The term jitter is used normally for an unwanted phase modulation.

I can't see, if the diagram is intended as an example to explain phase modulation or clock jitter analysis or if it shows a generated signal with specific parameters. Thus I can't comment the 2/3 modulation index, apart from confirming that it has to be below unity.

The question, how to generate a similar signal may be answered different, depending on the required application parameters.