Abstract: The Invention, titled the “Split Chip” by the Inventor, contemplates an RFID enabled consumer oriented tracking system which protects consumer privacy by splitting a miniaturized silicon RFID transponder circuit into a retained piece and a detached piece. The two pieces are electrically connected by a fine piece of conductive material. Each piece is dependent upon the other in order to disgorge data. The electrical connection between the two pieces can be severed by the consumer by tearing the fine piece of conductive material at a designated spot on the substrate making the Split Chip moribund. Upon a return or refund of the consumer item the original data can be recovered through a laser guidance system which connects the retained piece and its alpha numeric identifier to a back end host computer administration network.

Abstract: A multiplexing system is provided for a plurality of sensors disposed in a tank containing a potentially explosive environment and excited from a common excitation circuit outside of the tank through a corresponding plurality of signal lines that penetrate the tank. The multiplexing system comprises: a multiplexer switch for each sensor, each multiplexer switch disposed outside of the tank in series with the corresponding signal line between the common excitation circuit and the corresponding sensor in the tank.

Abstract: A scalable N×M switching matrix architecture is characterized by a readily calculable number of crossover locations and comprises one or more single pole, N throw (“SPNT”) switches and, for each such switch, an N state impedance converter/amplitude compensation network.

Abstract: An Internet Protocol (IP) telephone has a constant impedance filter that is capable of being continuously attached to the physical layer of a computer chip in the IP telephone. The constant impedance filter is located outside the physical layer and is connected to a relay on the physical layer. The relay is configured using native FET devices, which are normally conductive without a supply voltage. Therefore, the relay is capable of operating during the discovery mode of IP telephone operation, where no power is applied to the substrate. Rectifier circuits rectify an incoming signal during discovery mode, and apply the rectified signal to the gate of the relay to improve conductivity of the relay. This allows for faster detection of the IP telephone during discovery mode. During normal operation mode, voltage is applied to the physical layer, and the relay is opened by grounding the native devices.