Abstract: A modulated power supply comprises a power switching stage having at least one power switching device for generating a power signal in response to an input modulating signal. A current source is positioned in parallel with the power switching stage and continuously generates an output current. An output stage combines the power signal and the output current to form an output power supply signal. The current source supplies some, or all, of the required current at any given time. The switching device in the power switching stage either supplies the remaining required current or sinks any excess current. This has an advantage of reducing the average and peak currents flowing through the switching device, and hence the average power dissipation in the device. The output current can be set at an average (e.g. RMS) value of the current in the output power supply signal.

Abstract: A cartridge-type faucet valve is provided which includes a housing with an inlet, an outlet and an insert assembly (or cartridge) seat interposed between the inlet and outlet and for cooperating with a portion of an insert assembly or cartridge to provide a seal between the inlet and outlet. The insert assembly or cartridge includes a stationary elongated sleeve and a stem mounted within the sleeve which is longitudinally movable over a range of travel between a closed position and a fully open position. One section of the stem co-acts with the sleeve to control the longitudinal position of the stem. Another section of the stem cooperates with an internal surface portion of the sleeve to provide a longitudinally extending flow passage for communicating from the inlet to the outlet. A seal piece is mounted on the stem and is adapted for engagement with a stationary seating surface adjacent one end of the sleeve.