This 4-channel mixer amplifier was found in an American publication from 1947. The circuit uses counterphase output tubes and a transformer power source.
August 2017 - The new N-channel MOSFETs from Vishay's TrenchFET Gen IV family can now be purchased from...
This circuit, which combines a bipolar with any JFET, was found in the April 1993 issue of...
August 2017 - Texas Instruments' new integrated circuit BQ25872, a 7-A keyed battery charger with...