This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a carrier. The used components are not common today.
This crystal-controlled oscillator can generate signals as high as 200 MHz. The L1 coil is made up...
This circuit causes the relay to be energized when the input voltage exceeds the voltage value of...
In the figure we have an application of an oscillator 4013 as voltage multiplier. It consists of a...