Found in RCA documentation from the 1970s, this circuit is intended for firing thyristors in inverter circuits. The components are from the era and the operating frequency is 10 kHz.
We find this circuit in a technical documentation of 1976. The transistors can be the BD135 and...
We found this circuit in an English magazine from 1976. The magazine no longer exists, but just...
This circuit was found in an 80s National Semiconductor documentation. The configuration holds...