Abstract: The present invention provides for dynamic insertion loss control for a 10/100/1000 megahertz Ethernet power on differential cable pairs. A power feed circuit supplies power to a network attached device (PD). An insertion loss control circuit limits power loss in a coupled power feed circuit. The insertion loss control circuit determines an insertion loss limit and senses an average power of the power signals to produce a common mode feedback signal to the power feed circuit. The insertion loss limit is determined for the received signals based on a differential RMS of the received Ethernet power signals as seen by a differential transistor pair. Alternatively, the insertion loss limit may be determined logically by the higher layers of the network protocol based on the AC differential portion of the network power signal.

Abstract: A Chanukah menorah having a base, a power source and a plurality of illumination members detachably secured to the base in a substantially vertical orientation. The illumination members include a translucent fixture having the shape and appearance of a candy cane. Light sources in the fixture are coupled to the power supply and provide illumination. Switches are coupled to the power supply and light sources for independent illumination of individual members. A projection may be provided to represent the menorah Shamash. The menorah may be operated manually via the switches or automatically via a timer coupled thereto.

Abstract: A signal processing circuit includes a main input sampling structure with an integrator operational amplifier and input lines including a switched capacitor. The input lines have switched connections to input signal lines and reference signal lines. A replica sampling structure is used in combination with the main input sampling structure to eliminate or reduce signal-dependent current that is drawn from the input signal line and the reference signal line. The replica sampler includes buffered input lines and switched capacitor of the input sampling structure but the capacitors have switched connections to the reference signal lines such that the connections have opposite polarity to the connections of the reference signal line to the input sampling structure. The replica sampler eliminates or reduces signal-dependent current from the reference signal lines. Buffering of the input lines in the replica sampler eliminates or reduces the signal-dependent current drawn from the input signal lines.

Abstract: Chemical vapor deposition reactions are carried out by introducing first and second precursors for the material to be deposited into a reaction chamber (5) along a plurality of separate discrete paths (21,24) where they are cooled prior to entry into the reaction chamber. The precursors are mixed in the reaction chamber which contains a heated substrate (4) and react to deposit the material on the substrate.

Abstract: Substrates on which vapor deposition is to take place are mounted on the outside of a generally bell-shaped susceptor which is itself mounted immediately outside a similarly shaped shield which is transparent to infra-red radiation. Infra-red lamps are mounted within the shield and the radiant heat from them passes through the shield and heats the substrates through the susceptor. An outer, opaque, shield defines an annular gas passage through which reactant gases pass over the heated substrate to cause vapor deposition thereon. Purging gas may be passed between the transparent shield and the susceptor. The lamps and the susceptor may be relatively rotated. The arrangement substantially eliminates the possibility of the reactant gas causing deposition on the transparent shield which would interfere with the passage of radiant heat to the susceptor and the substrate.