We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994. The circuit can be adapted to use other operational amplifiers and the power supply must be symmetrical.
This adjustable circuit from 0 to 200 nA was found in a 90's EDN. The components can still be...
We found this circuit in 2005 Linear Technology documentation. MPOSFET is load-matched. The...
This circuit generates audio tones in a speaker with controlled frequency and volume. The...