[time-nuts] Phase shifter circuit for DTMD

[Stephan Sandenbergh]

Hi,
Many sources and papers refer to the actual DMTD mixer system (and
zero-crossing detector etc.). But, I've seen very little on the phase
shifter circuits, that are used in conjunction with this system.

I was hoping some of you might have experience, and perhaps a circuit
example. If it is similar to what is used in audio applications, the single
opamp, 0 - 180deg, RC-all pass filter, it is simple. However, I assume there
are more to it than that. It seems such is the case with all precision time
related things :)

Regards,

Stephan.