This circuit is a four-quadrant multiplier using an LM3900. The circuit was found in the July 1988 Radio Electronics magazine.
This high frequency modulator was found in Motorola's 1990 Linear Databook. The current depends on the...
This circuit was found in an old Electronic Design used to apply digital signals to an analog...
Based on the frequency of the power grid, this circuit produces square signals for use in digital...