Apparatus for generating and detecting magnetic field components oscillating at a radio frequency in a direction transverse to a static magnetic field in a nuclear-magnetic-resonance (NMR) system. The apparatus has a plurality of conductive elements spaced from one another and from the axis along which the static magnetic field is directed. The relative amplitudes of alternating currents in the conductive elements are controlled to generate a spatially uniform field. A preferred embodiment uses ...

A distributive beam steering computer network for a radar phased array antenna is disclosed which provides direct drive for individual antenna phase shifter elements using a plurality of microcomputers co-located with each phase shifter. The microcomputers calculate the phase shift based on constants stored in a ROM which is located in each microcomputer and phase shift data comprising sin .alpha., sin .beta., and 1/.lambda. signals are distributed to all microcomputers over a single serial data...

A distributed feedback semiconductor laser which has, in an active layer or an adjoining layer, first corrugations causing periodic refractive index variations in the travelling direction of light and performs laser oscillation by the injection of a current into said active layer portion. In accordance with the present invention, second corrugations are formed to be aligned obliquely to said first corrugations, thereby causing additional loss to the TM mode to permit oscillation in the TE mode a...

A distributed feedback semiconductor laser which is characterized in that periodic corrugations are performed in the surface of an InGaAsP quaternary layer so that an InP layer is grown thereon so as to overcome difficulties in prior arts.

In a distributed IMPATT structure, power is coupled out through a side contact. That is, in previously proposed distributed IMPATT structures the gain medium (the active region of the IMPATT) operates as a transmission line. The prior art has attempted to couple output power from the gain medium through an end contact, i.e. through a contact which intercepts the primary direction of energy propagation of the active medium. In the present invention, a side contact extends along the whole active r...

Disclosed is a distributed prioritized concentrator that manages the flow of information through high data rate communications paths. The concentrator accumulates incoming packets as necesary, sorts the accumulated packets in parallel based on the relative priority of the packets, and transmits as many of its highest priority packets as there are available communication channels. In its simplest form the prioritized concentrator comprises a parallel sorting network having some of its inputs conn...

A timing system, for distributing clock signals in a synchronous processing system having plural processing sections, includes a central clock circuit and a plurality of section clock circuits, each section clock circuit being located in and associated with a different one of the processing sections. Each section clock circuit is arranged to respond to a system clock signal for stepping through a plurality of states including a state common to the plurality of section clock circuits. An arrangem...

A communications system includes a transmission medium for carrying signals divided into frames, with each frame being divided into time slots. At least three interface units interface selected equipment to the transmission medium. Each of the at least three interface units is capable of receiving selected signals carried on the transmission system and of delivering intermediate signals derived from these selected signals to a corresponding one of the selected equipment, and of transmitting seco...

Four unit FETs are linearly disposed in the length direction of the belt-shaped gate electrode. The neighboring drain electrodes and the neighboring gate electrodes are connected through high-impedance transmission lines, respectively. The end opposite to the output portion of the circuit connecting the drain electrodes and the end opposite to the input portion of the circuit connecting the gate electrodes electrically in consecutive order are connected to terminating circuits having no resistor...

A distributed interconnect and a method is provided for interconnecting electrical components which minimizes coupling inductance and increases bandwidth. The interconnect includes a transmission line with a first and second conductive transmission element. The first conductive transmission element is disposed between a first and second terminal, and has an impedance characteristic that increases from the first terminal to the second terminal. The second conductive transmission element is dispos...