Yes, load isolation is a valuable feature I left out. Perhaps the key feature. The audio designers like it for channel separation. ------Original Message------ From: ed breya Sender: [email protected] To: [email protected] ReplyTo: Discussion of precise time and frequency measurement Subject: [time-nuts] Low noise power supplies for time nuts circuitry Sent: Nov 22, 2011 2:17 PM
The shunt regulator also serves to isolate load current fluctuations from the main supply, since it makes it appear as a constant resistance, current, or power load, depending on the design. This can eliminate cross-talk between various circuitry. For example, I just made one for my new 5065A LED clock design. It makes 4 V for the display, and is able to absorb the nasty 90 mA to 250 mA local range caused by the LED numeric and scan load, but the steps are virtually invisible to the +5 V supply - it looks like about a 4 ohm resistive load into about 4 V source. Ed _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
