We found this circuit in a publication by General Electric in the 1980s. The transistors and the PUT are from that time. The control is done by a tachometer based on an optical coupler.
We found this circuit in a publication from the 1970s. The circuit detects when the pulse duration is...
Found in a 1988 publication, this 455 kHz crystal oscillator circuit is used to calibrate AM...
This oscillator for sinusoidal signals uses a lamp as a stabilizing element. We found it in the...