Single grounded resistance tuneable sinusoidal oscillator

An LC sinusoidal oscillator that requires only three transistors and some passive components is presented. Contrary to the usual method which requires the use of a variable-capacitance (varicap) diode to control the oscillation frequency value, this frequency value is controlled here through a grounded resistor. Another grounded resistor independently controls the condition of the oscillation. Measurements on a prototype that confirm the theoretical analysis are included.