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Apr 3rd, 2020, 3:42am
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RMS power detector - singal independent demodulation??? (Read 520 times)
Horror Vacui
Community Member

Posts: 99
Dresden, Germany
RMS power detector - singal independent demodulation???
Jun 06th, 2018, 1:39am
I have read the following sentence in [1], what I do not agree with and I would like to know what do I miss in interpretation/context or in technical knowledge:
"A RMS power detection is more useful than peak power detection because it can measure a modulated signal independent of its waveform shape."

Modulation schemes in general rely on amplitude, phase or frequency changes vs time. I do not see how is the sentence above true. Even a peak detector can follow the amplitude changes, while no power/peak detector can detect change in phase or frequency.

I tend to interpret "measure" as demodulate, since anything can be measured with a measurement block, and the sentence would not convey information.

What do you think about it? Do you agree with the citation?

[1] U. R. Pfeiffer and D. Goren, A 20 dBm fully-integrated 60 GHz SiGe power amplifier with automatic level control, IEEE J. Solid-State Circuits, vol. 42, no. 7, pp. 14551463, 2007.
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