[time-nuts] Brooks Shera
Attila Kinali
attila at kinali.ch
Mon Mar 25 18:12:09 UTC 2013
On Mon, 25 Mar 2013 18:56:34 +0100
Attila Kinali <attila at kinali.ch> wrote:
> Because of this, the behaviour of the
> counter is undefined and can lead not only to missing one count (which
> would be caught by the PI control loop as additional noise), but the output
> of the D-flip flops in the counter can switch or not switch depending
> on the wheather in Guatemala.
Maybe to clarify here:
The reason why all 4 flip-flops (and thus all 4 output bits) are affected
is because the 74HC4520 passes the input clock to all four flip-flops
(see figure 5 in http://www.nxp.com/documents/data_sheet/74HC_HCT4520_CNV.pdf)
Attila Kinali
--
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