Digital position transducer including variable tuning element oscillator

A digital position transducer apparatus comprising in combination:

• an oscillator means with a variable tuning element to control the output frequency of said oscillator means, said tuning element being connected to and varied by a position element which responds to the displacement of a control element, said output frequency varying as a function of said position element's displacement,
• a transmission gate connected between a signal ground and a source voltage, said transmission gate receiving said output frequency from said oscillator means, said transmission gate being turned on and off respectively to provide a high logic level and a low logic level in response to said output frequency, said transmission gate providing an output signal which is substantially a square wave comprising high and low logic levels, said output signal having a frequency corresponding to said output frequency, and,
• a low logic level sustaining means connected between said source voltage and said oscillator means, said low logic level sustaining means maintaining a predetermined voltage level across said oscillator means during the time said transmission gate is turned on.