This circuit is from an 80's technical newsletter. The circuit can use any general purpose transistor and its power supply can be changed with a resistive divider to use a single 9V battery.
Suggested by Texas Instruments in 1968 documentation, this circuit uses components from the era....
I found this circuit in an article in a 2003 publication. The circuit is an example of how to...
This configuration makes use of an LM3900 transconductance operational amplifier. The transistor can...