AW: AW: VC Phaser using the LM13600

[Haible Juergen]

	[...]

	>The same inverse relationship applies to
	>the 4 x 135 degree notches. Both cases produce identical amplitude
	>responses (theoretically). I don't know how they compare in
practice,
	>but simulations using Electronics Workbench show identical results
when
	>the response is displayed with the Bode plotter.

Yes. You would see a difference for 5 (or any odd number of)
stages, however, because you have an inversion in each stage
in one case vs. the other.
If you add the direct signal normal and / or inverted you can
get both options with each topology. Same for the sign of the
feedback loop.
(Most phasers use an even number of stages anyway.)

JH.