This circuit was found in an American 1980s documentation. Dual FETs can be replaced by single equivalents. Control voltage ranges from 0 to 1 V.
I found this circuit in a 1980 publication. Originally it was created to have a fixed tuning, but...
April 2017 - Texas Instruments' new high-precision TMP468 sensor can now be obtained from Mouser...
This circuit, from a 1981 publication, can be changed to use more modern components such as the...