T
treez
Guest
Surely a type one compensator phase vs frequency Bode plot should always be drawn with -270 degrees phase?
I mean, -180degrees for the inverting opamp...then -90 degrees for the capacitor in the feedback path...thats -270degrees...so why do most people say the phase is -90 degrees?..its non-intuitive.
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Same thing tfor the type 2 compensator on page 5 of this...
https://www.ti.com/lit/an/slva662/slva662.pdf
..surely the phase should start off at -270 degrees, not -90 degrees?
Starting it at -90 degrees ignores the -180 degrees contributed by the inverting opamp...the inversion gives the -180 degrees....why do all articles ignore it?
I mean, -180degrees for the inverting opamp...then -90 degrees for the capacitor in the feedback path...thats -270degrees...so why do most people say the phase is -90 degrees?..its non-intuitive.
-------------------------------000000------------------------------------
Same thing tfor the type 2 compensator on page 5 of this...
https://www.ti.com/lit/an/slva662/slva662.pdf
..surely the phase should start off at -270 degrees, not -90 degrees?
Starting it at -90 degrees ignores the -180 degrees contributed by the inverting opamp...the inversion gives the -180 degrees....why do all articles ignore it?
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