clock signal 1

[samuels]

Hi,

Any good ideas for generating an accurate 60Hz/50Hz square wave pulse for driving the clk i/p of a digital clock circuit.
Should be quartz crystal based.

Thanks,
samuels

 

[IRstuff]

What's wrong with a crystal oscillator and a counter? TTFN

 

[Lewish]

How accurate? Does it need a selectable 60 or 50 pps output?

I have a Cesium Beam Standard that will give you accuracy of 2 times 10 to the minus 13. In case you need that kind of accuracy.

 

[benno]

You just need an Xtal and a divider for that and maybe a flip flop buffer on the O/P to give you an accurate pulse WRT the rail. Here's the whole thing in one chip

http://www.elmelectronics.com/DSheets/ELM446DS.pdf

Ben Roberts

Broadcast Engineer

Sentient being.

 

[automatic2]

depending on your accuracies, pull it off line frequency.