http://www.experimentalistsanonymous.com/ve3wwg/ 2013-05-19T01:03:51-06:00 http://www.experimentalistsanonymous.com/ve3wwg/ http://www.experimentalistsanonymous.com/ve3wwg/lib/tpl/default/images/favicon.ico text/html 2012-12-14T22:10:27-06:00 ve3wwg http://www.experimentalistsanonymous.com/ve3wwg/doku.php?id=lm3900_testing&rev=1355548227&do=diff LM3900 chips include 4 CDAs in a 14-pin dip. No matter what price you've acquired these at, you need to know if they are “good”, especially if you choose not to use a socket. Pinout [LM3900 Pinout] When wiring or testing the LM3900, be careful about the pin layout. It is easy to become confused about the pins. text/html 2012-12-14T22:05:56-06:00 ve3wwg http://www.experimentalistsanonymous.com/ve3wwg/doku.php?id=cda_opamp&rev=1355547956&do=diff [Current Differencing Amplifier] The current differencing amplifier (CDA), also known as the Norton amplifier, is very similar to the opamp in principle, but is different in its operation. These differences lead to certain design advantages like a single power supply operation.