[sdiy] Phasing circuit

[Czech Martin]

Has anyone built a "phasing" circuit for audio applications
(instead for amatuer radio)?

This is a passive RC network wich will deliver four signals
with 90 deg phase difference on the outputs.
It is driven by balanced input.

It is described in "Art of ELectronics" and was supposed by Weaver.
http://members.tripod.com/michaelgellis/mixerscom.html
figure 14.

Isn't the Hammond vibrato circuit very similar??

I like the circuit because of matching.
OTOH it has an amplitude "hump" which would need some
compensation at the imput.

m.c.