differential clock

[Andrew Eckhardt]

I'd like to see the whole circuit.

[QSerraTico_Tico]

Originally Posted by Andrew Eckhardt

I'd like to see the whole circuit.

Me too

[Bernhard]

Originally Posted by Andrew Eckhardt

I'd like to see the whole circuit.

IMHO the usual tech-talk-bla-bla with lots of claims what specs are better than on other clocks, based on spice simulations of a yellow black box but no schematic and no single word how it is achieved.

:**:

[Bernhard]

Originally Posted by bordins

I wonder what special about this differential clock, compared to popular ones such as KC7 or Tent clocks.

Noise in the oscillator signal that comes from the psu appears common mode on the differential inputs of the comparator and will be rejected.

A single ended clock would modulate the supply voltage.
The differential clock draws constant current and keeps the supply clean.

So, in theory the differential clock should be superior.

Perfect shielding against electric and magnetic fields is maybe most important.

[wildmonkeysects]

...is full of amazing co-incidences.

[malay]

Originally Posted by wildmonkeysects

...is full of amazing co-incidences.

Yes, happens!

What at you now vision, has passed a lot of time, about 7 years?
The scheme has reached perfection?

[Bernhard]

Schematic updated, works very well.

[EUVL]

If I may ask a couple of questions :

Why use 2SK152 instead of other JFETs ?
And why not an extra (JFET) driver stage at the oscillator for the comparator a la Hagclock ?


Thanks in advance,
Patrick

[bordins]

Hi Berhard,

Thanks a million for the explaination.

A friend of mine also explained to me that the differential signal can become a noise generator, into other parts of the circuit.

Can we make PCB trace for the clock output ? Should we choose point-to-point floating cabling instead, like in the products from Audiocom (single-ended, btw).

If so, which cable is appropriate ?

[EUVL]

> For conversion to square, I intend to use AD9687 which has ECL outputs.

I guess you meant AD96687 ....


Patrick