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 circuit of the 1970s uses Germanium transistors. Changes can be made to use silicon...
This circuit sources a ramp signal with characteristic given by the diac. The circuit is powered...
January 2017 - Texas Instruments' new TLVx376 series precision operational amplifiers can now be...