Hi: Geller's patent 7382179 Voltage reference with enhanced stability explains how he combines the AD587 voltage reference with the LM399 voltage reference to obtain improved temperature stability. The method can be used with the LT1000. http://www.google.com/patents?id=v0GqAAAAEBAJ&dq=7382179
7380471 Micro gust thermal anemometer is a similar circuit by Geller where the LM399 is installed on the PCB using the untrimmed leads so that it's up in the air. Any wind changes it's temperature which is seen as an output. http://www.google.com/patents?id=GDuqAAAAEBAJ&dq=7380471 I found a drawing on the National Semi web site for a Valox plastic shield for the LM199, but there's not any other info about it or the specified material. http://www.national.com/packaging/mkt/h04d.pdf Brooke Clarke http://www.prc68.com _______________________________________________ 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.
