Abstract: A water recycling system primarily adapted for use in shower facilities enabling the user to increase both the time duration of a shower and the quantity of water experienced by a user, by maintaining water in a semi-closed system, while both maintaining water and energy conservation. The system preferably operates with fresh and recirculated hot water. The system utilizes spent hot shower water located in the catchment area of a shower or tub and recycles this water to one or more spray heads located at or in the proximity of the regular water dispensing head or so-called "spray head" of that shower. A selected water temperature can be maintained by periodically introducing fresh water or continuously introducing the fresh water at a very low flow rate from a fresh water source, and mixing that water with the recycled water from a water catchment area. Recycled water can also be re-heated and issued again.

Abstract: A digital logic circuit using Schottky diodes as the nonlinear logic element, a single power supply and an E-mode MESFET as an inverter in the open drain configuration. Temperature compensation of the threshold voltage of the E-mode FET is provided. The circuit is particularly suited for use with a GaAs substrate.

Abstract: A high performance logic family for GaAs Enhancement/Depletion mode MESFETs is disclosed. The inventive logic family exhibits a large noise margin with little sacrifice in speed/power performance.

Abstract: An improved topology for a multi-input Boolean logic circuit whereby the circuit can be realized in integrated circuit form while consuming less area on the semiconductor wafer and exhibiting lower parasitic capacitance than equivalent integrated circuits using conventional topology. Rather than employing what might be described as an "in-line" topology of the prior art, a ring topology is used wherein adjacent MESFET's share a common region for source, drain, or source/drain contacts and wherein the amount of second level interconnect required is minimized.