Aeronutronic Ford Corporation

Rufus F Shelby

When voltage variable capacitor (VVC) diodes are used to tune the r-f circuits of receivers, a potentiometer is usually used as the mechanically operated source of variable voltage. To avoid tuning problems associated with power line variations, or receiver circuit conditions that cause voltage variations, a well regulated source of d-c voltage is used to supply the control circuits. The improvement disclosed here involves applying an automatic frequency control (AFC) voltage, also known as automatic fine tuning (AFT) voltage, to the control circuit of the voltage regulator. Since the tuning voltages are obtained from the regulated source, the magnitude of regulated voltage will be controlled by the AFC voltage. If the polarity of AFC action is set to minimize the AFC error voltage, automatic frequency control or fine tuning is achieved.

Growing community of inventors

Philadelphia, PA, United States of America

Rufus F Shelby