On 1/30/12 5:53 AM, GastonP wrote:
Hi David...
IMO, as the start of the digit ionization is what is unreliable we
would have a train of pulses of known duration but with random
separation (period, frequency, etc.).
This is unless I got all wrong and only the first start of the
discharge is the unreliable one.
My experience is that it is only the first pulse that has trouble
starting. After you get the tube to light, there are enough ions
rattling around in side it that subsequent PWM pulses work just fine.
But this may not be the case for very short PWM pulses, as the
oscilloscope reveals a millisecond or two of variation in the voltage ->
ionization delay in a multiplexed tube.
--
David Forbes, Tucson AZ
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