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In article writes:
Fair enough, but I think the term 'phase SHIFT' does imply, and even
requires, delay.
It certainly implies delay.
That definition would allow for use of the term 'phase invert' though,
wouldn't it? I was always taught that was erroneous.
No. There are a couple of terms for known amounts of phase shift from
a reference point. "inveraion" is 180 degrees, "quadrature" is 90
degrees. You can do either (or any other amount of phase shift) with a
fixed amount of delay, but only for one frequency.
Poliarity inversion of a repetitive waveform looks like 180 degrees of
phase shift regardless of the frequency, but it really isn't.
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