A method that measures the phase of a damped LC circuit oscillatory
transient triggered by the event to be timestamped:
http://risorse.dei.polimi.it/digital/products/2010/High frequency,high
time resolution time-to-digital converter employing passive resonating
circuits.pdf
<http://risorse.dei.polimi.it/digital/products/2010/High%20frequency,high%20time%20resolution%20time-to-digital%20converter%20employing%20passive%20resonating%20circuits.pdf>
A dual of the circuit is readily devised using a CMOS gate plus an open
drain (or equivalent) gate output for damping/quenching.
However the ADC employed needs to be able to capture a sample burst at a
relatively high sample rate.
Bruce
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