Abstract: An improved power cable having an untwisted ground wire and at least two current carrying wires twisted about one another. The at least two current carrying wires make up a group having a central axis located at the cross sectional rotation axis of the current carrying wires and at a fixed distance from a cross sectional center of the untwisted ground wire, and wherein the current carrying wire group central axis and a ground wire central axis helically rotate around a common axis.

Abstract: An improved power cable comprising an untwisted ground wire and at least two current carrying wires twisted about one another. The physical arrangement and location of the twisted wires relative to the ground wire minimizes the voltage induced on the ground wire when compared to conventional power cables that contain a ground wire running parallel with or twisted at the same rate as the current carrying wires. The power cable is designed to connect electronic equipment, devices, or panelboards at voltages ranging from 0 to 600 volts AC and 0 to 750 amps.

Abstract: A socket connector includes a conductive center receptacle, first outer socket contact having a first socket contact surface, second outer socket contact having a second socket contact surface, and non-conductive socket body. The socket contact surfaces are separated longitudinally along an axis of the receptacle. The socket body maintains the socket contacts electrically isolated from each other and the receptacle whenever the socket connector is not mated with a bi-conducting plug connector. A plug connector includes a conductive center pin, first outer plug contact having a first plug contact surface, second outer plug contact having a second plug contact surface, annular insulator, and non-conductive plug body. The plug contact surfaces are separated longitudinally along an axis of the pin. The plug body and insulator maintain the plug contacts electrically isolated from each other and the pin whenever the plug connector is not mated with a bi-conducting socket connector.

Abstract: A socket connector includes a conductive center receptacle, first outer socket contact having a first socket contact surface, second outer socket contact having a second socket contact surface, and non-conductive socket body. The socket contact surfaces are separated longitudinally along an axis of the receptacle. The socket body maintains the socket contacts electrically isolated from each other and the receptacle whenever the socket connector is not mated with a bi-conducting plug connector. A plug connector includes a conductive center pin, first outer plug contact having a first plug contact surface, second outer plug contact having a second plug contact surface, annular insulator, and non-conductive plug body. The plug contact surfaces are separated longitudinally along an axis of the pin. The plug body and insulator maintain the plug contacts electrically isolated from each other and the pin whenever the plug connector is not mated with a bi-conducting socket connector.

Abstract: A bootstrapped audio line receiver that receives a differential-mode input signal from first and second differential lines and outputs a single-ended signal on an output line. The line receiver includes a differential amplifier and an input amplifier having differential output terminals and differential input terminals. The input amplifier is connected between the differential lines and the differential amplifier. The input amplifier provides a dc current path to a ground terminal while maintaining a high input impedance to ac signals at audio frequencies. The input amplifier also includes an rf filter that removes rf noise without adversely affecting the line receiver's common-mode noise rejection at audio frequencies. In one embodiment, the input amplifier includes two operational amplifiers connected for unity gain and having two bias resistors connected in series between each input terminals of the input amplifier and a ground terminal.

Abstract: The instantaneous amplitude of an analog audio signal is periodically sampled to be converted into multibit binary digital words representing the sampled amplitude. The bits of successive binary words are reproduced serially with appropriate word and frame synchronizing pulses in quaternary coding to pulse code modulate the FM carrier signal used in standard video recording. The recorded signal is demodulated on playback to reproduce successive digital words that are converted into discrete analog values which are low pass filtered to reproduce the original audio signal. The reproduced digital values are also stored in successive address locations of a random access memory.

Abstract: The instantaneous amplitude of an analog audio signal is periodically sampled to be converted into multibit binary digital words representing the sampled amplitude. The bits of successive binary words are reproduced serially with appropriate word and frame synchronizing pulses in quaternary coding to pulse code modulate the FM carrier signal used in standard video recording. The recorded signal is demodulated on playback to reproduce successive digital words that are converted into discrete analog values which are low pass filtered to reproduce the original audio signal. The reproduced digital values are also stored in successive address locations of a random access memory.