This circuit was found in a Motorola documentation from the 70s. The integrated circuit is from the time, an operational power amplifier according to the controlled motor.
This circuit was obtained from an English magazine from 1981. The magazine no longer exists, but...
This circuit for measuring very low currents was found in an American documentation from the...
This high input impedance and high output current circuit was found in 702 Motorola documentation. The...