This circuit is indicated for supplying the CB17495E transmitter. The BD135 must have a small heat radiator and the zener may eventually have a higher voltage.
Found in American documentation, this amplifier stage has unit gain and a high input impedance. It...
This circuit was found in an American documentation on transistors from the 60's. The transistor is made...
This circuit was suggested by Philips in 1967 documentation. The circuit receives modulated light and has...