We found this circuit in a 1964 Electronic Design. It divides the frequency of a 20 MHz signal by 2. The circuit uses a transistor from that time. Details of the coils were not given.
This circuit makes use of the Linear Technology LT6100. We find it in a 2005 company manual. The...
This circuit, from a 1976 documentation, amplifies signals from 100 Hz to 600 kHz with a voltage fan...
This zero-crossing detector circuit produces an output pulse every time the input sinusoidal...