This circuit was found in an Electronic Design from 1964. The components are from that time and can be replaced by equivalents. The modulation ranges from 0.25 to 0.75 of the 20 kHz pulses.
The circuit presented was found in the National Semiconductor Linear Applications Handbook. The...
With the circuit shown in the figure we have a frequency modulation which is produced by a...
The configurations of the two previous circuits can be modified to operate with a simple power...