This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V and other frequencies can be generated with capacitor replacement.
This circuit for a 455 kHz ceramic filter was found in the October 1952 Radio Electronics...
This circuit is from 1971 documentation. It generates a ramp given by the input signal. The FET...
This circuit is intended to provide a standard signal for oscilloscope calibration. We found it in...