Abstract: The system of the present invention allows transmission of information and data across a gap, for example, from the steering wheel of an automobile to the steering column, without any physical connection between the information source and the information or data gathering circuit. Furthermore, the information source requires no power. The system of the present invention utilizes the principle that an oscillator circuit is loaded by an inductively coupled circuit tuned to oscillate at approximately the same frequency. Loading the oscillator circuit causes the oscillator L-C loop voltage amplitude to decrease.

Abstract: A system for single sideband modulation, and a method implemented by the system. The system includes a double sideband, suppressed carrier modulator and a phase locked loop circuit receiving the output of the modulator and tuned to lock to one of the sidebands of the modulator output. The phase locked loop circuit produces an output having a constant amplitude, but otherwise tracking the signal contained in the one sideband. The output of the phase locked loop is processed by an amplifier having a controllable gain. Open and closed loop circuits are provided for deriving the amplitude of the signal contained in the one sideband. The latter amplitude is imparted to the output of the phase locked loop by using the signal amplitude to control the gain of the amplifier.