Dear Bert and all,
maybe I missed it, but how can a linear regulator filter out transients
from a switched PSU? The cited LT1764A has less than 30dB Suppression at
100 kHz getting worse for higher frequencies.Even the famous 7805 had
only 50 dB suppression. For going to a real clean PSU, I would expect
some old-school filtering and screening should be fine.. or am I wrong?
A classic 50/60 Hz all linear PSU has a bad efficiency, but very little
high frequency spurs to care about. For my current project (GPSDO with
double oven HP10811), I will only use those.. even the classic LED
7-segment display I am planning to use will not use multiplexed mode but
quasi-static (1 Hz update rate only).
Regards,
Achim
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