We found this circuit in the Linear Technology Applications of 1997. The circuit uses components from that time and the transformer has a voltage greater than 1 000 V depending on the laser used. Transistors are power types as BD135.

We found this circuit in the Linear Technology Applications of 1997. The circuit uses components from that time and the transformer has a voltage greater than 1 000 V depending on the laser used. Transistors are power types as BD135.