This transistorized stage has a high gain, being adjusted by VR1. The circuit can be used as an excellent audio preamp. We found this circuit in a 1996 English publication.
We found this circuit in an 80's Electronic Design. The circuit uses an integrated of the time....
With this circuit (shield) we can control a load from 500 mA to 1 A, depending on the transistor, using a...
The consumption of this circuit is only 50 uA in the standby condition and 4.5 mA when supplying a pulse...