The integrated circuits used in this oscillator are not very common today, as we obtained it in documentation from the 1980s. The circuit must be powered by a symmetrical source.
This circuit, found in a 1994 publication, allows the use of two common analog telephone sets on a...
This 1967 General Electric circuit makes use of an array of 3 (integrated) transistors for an...
This modulator circuit for low intensity signals is from old documentation. The integrated circuit...