Only found info about PICTIC 1 and 2:
http://www.ko4bb.com/doku2015/doku.php?id=precision_timing:pictic
Where´s info about PICTIC III?
Daniel
Em 13/05/2016 14:51, Attila Kinali escreveu:
On Fri, 13 May 2016 07:36:10 -0400
Bob Camp <[email protected]> wrote:
Given that a “real” TDC is a resistor and capacitor attached to a FPGA pin
(plus the ADC)
the cost of doing it better is not all that much. You can get down to a few
hundred ps without
a lot of crazy effort ( still using the MCU ADC).
The PICTIC II did 250ps resolution with an effective resolution of 680ps[1].
The upgraded version III had IIRC a resolution of ~25ps with better than 100ps
achieved. Eventhough the PICTIC III design is a bit more involved than
then II, it's still relatively simple (it uses more stable current sources,
buffer opamps, external ADCs and an active offset compensation scheme).
Attila Kinali
PS: Does anyone know what happend to Richard McCorkle? I haven't heard
of him in ages.
[1] http://www.ke5fx.com/pictic.htm
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