The circuit shown is from the 1994 National Semiconductor Linear Applications Handbook. The semiconductor component used is not common today.
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...