2N4987 and 2N4990 (IP057E)

Unilateral switch (SUS) with 8 V of trigger voltage. This component is used to control SCRs and other applications.

Reed Relay Controlling a Triac (CB12184E)
This traditional configuration from a 1980 publication shows how a reed relay is used to control a 240...
Controlled gain amplifier TBA400 (CB21886E)
This circuit was obtained from the 1976 Siemens Integrated Circuits Manual. It is the circuit for...
Transistorized Oscillator (CB18944E)
This oscillator is from a European publication from the 1980s. The signal generated is of low...