This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms and excites a load of 16 ohms. The integrated circuit of the time is the PA237.
This interesting circuit, found in a 1986 publication, includes a powerful audio amplifier. Being...
This circuit with JFET and Unijunction was found in an ancient American documentation. The...
This circuit brings together in a single set a preamplifier and an equalizer with several inputs. The...