Tunnel diode - Saturable reactor insulated control amplifier
Ray E. Morgan · IEEE Transactions on Communication and Electronics · 1963
SOLID-STATE devices are providing solutions for many control problems in industrial and defense products. New semiconductors1 permit control techniques that previously were unavailable. Many control systems require amplifiers or function generators with insulation between the input signal and the output. Saturaable reactors2,3 have the needed insulated input. No semiconductor has an insulated input for d-c signals. The combination of semiconductors and saturable reactors provides the advantage of semiconductors and the advantage of insulated input.