This is one of the first radios with an integrated circuit. The circuit is from a Radio Electronics from November 1969. The circuit is powered by a 9 V battery.
The signal injector illustrated in the figure uses a single integrated circuit and generates...
This CMOS circuit was found in a Popular Electronics from the 80's. The circuit consists of a...
This conventional oscillator can generate signals from 8 to 30 MHz depending on the crystal used....