[time-nuts] DAC resistors

J. Forster jfor at quik.com
Tue Oct 6 23:09:27 UTC 2009


Or a binary counter and binary to BCD driver chips.

-John

============


>> I am constructing a phase meter to monitor the phase creep of clocks.
>> It consists of a BCD counter counting say microseconds that has its
>> count strobed into a latch by a pulse from the clock. The Latch drives
>> a DAC which drives a pen recorder and an analogue data logger. Now I
>> am familiar with R - 2R networks, and that method is used on each
>> decade but the resistors that combine the decades in a 10:1 ratio are
>> the problem. ...
>
> Why are you using a BCD counter?
>
> If you want it to drive a display, consider adding a binary counter in
> parallel with the BCD counter.
>
>
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>





More information about the time-nuts mailing list