This circuit is from National Semiconductor using an LM11, which is uncommon nowadays. The circuit can be implemented with other operational ones.
This circuit was found in a Radio Electronics magazine from November 1991. The circuit operates at 2.2...
April 2017 - The Shields of Seed Grove Modules for Intel Joule can now be obtained from Mouser...
The circuit shown is from the 1960 Mullard transistor reference manual. The circuit has a common...