Abstract: A printed circuit device used in conjunction with inductive power and data transmission applications is formed substantially of ferrite material, with an inductive coil conductor formed around the substrate to increase the electromagnetic properties of the coil for both power and data transmission functions, thereby eliminating the need for a discrete ferrite core wire-wound coil to be connected to the circuit device.

Abstract: A printed circuit device used in conjunction with inductive power and data transmission applications is formed substantially of ferrite material, with an inductive coil conductor formed around the substrate to increase the electromagnetic properties of the coil for both power and data transmission functions, thereby eliminating the need for a discrete ferrite core wire-wound coil to be connected to the circuit device.

Abstract: A device for detecting a covert transmitter having a time varying impedance therein including a radio frequency transmitter and an audio frequency transmitter which are directed so as to illuminate a target area. The audio tone drives the active elements into a non-linear mode of operation to modulate the transmitted radio frequency. The re-radiated energy is detected by a further radio frequency receiver.

Abstract: Integrated circuits contained in a rail are passed through cylindrical electrodes. Two electrodes are connected to an oscillator to transmit out of phase fields. A receiving electrode's output has the residual oscillator frequency component removed by a nulling network and summation device, whose output is fed to a band pass amplifier and balanced demodulator, which receives a phase shifted input from the oscillator. Demodulator output components at and above the oscillator frequency are removed by a low pass filter. A demodulator output above the reference voltage triggers a counter.

Abstract: Integrated circuits contained in a rail are passed through cylindrical electrodes. Two electrodes are connected to an oscillator to transmit out of phase fields. A receiving electrode's output has the residual oscillator frequency component removed by a nulling network and summation device, whose output is fed to a band pass amplifier and balanced demodulator, which receives a phase shifted input from the oscillator. Demodulator output components at and above the oscillator frequency are removed by a low pass filter. A demodulator output above the reference voltage triggers a counter.

Abstract: 1. In a frequency measuring system for measuring and indicating the frequency position of a signal within an extended band of frequencies, wherein said extended band of signals is divisible into a plurality of first sub-bands of equal extent and a plurality of second sub-bands of equal extent, the frequency extents of said first and second sub-bands being respectively different from each other, means for converting said signal to first signals only one of which occurs within each of said first sub-bands, means for further converting said signal to second signals only one of which occurs within each of said second sub-bands, means capable of measuring plural frequency locations within said plurality of first sub-bands for indicating the frequency location within said first sub-band of said first signal, and means capable of measuring plural frequency locations within said plurality of second sub-bands for indicating the frequency location within said second sub-band of said second signal.