This circuit is from a 1980's documentation for telecommunications. The circuit is used in SSB and the diodes must be suitable types for the application. The audio input is low impedance.
In this oscillator circuit using 3 TTL inverters we have all the conditions for the frequency...
This circuit was found in Japanese documentation from the 1960s. The coil must be 4 mH and the...
The circuit in the figure uses two of the 4001's four gates to trigger a relay in a timed manner. The...