An integrated circuit preamplifier formed on a single substrate divided into regions by insulation frames connected with the microphone of a telephone subset via transistor preamplifier and transistor output amplifiers in different regions to the subscriber's line. The operating voltages for the amplifiers are received via a conductor which has a decoupling resistor between the points which supply the respective amplifiers, and the portion of such conductor connected to the output amplifier is c...

An aircraft engine exhaust nozzle system having thrust vectoring capability for use in flight path management, for in-flight thrust reversal or modulation, or for thrust reversal during landing; and which includes a variable area nozzle for improved propulsion efficiency. The preferred embodiment utilizes an exhaust passageway having a rectangular nozzle exit area for minimum base area, boattail, and interference drag. An aerodynamically shaped plug is centrally located in the path of the exhaus...

Integrated solid-state memory in the form of an array, including row selection members, matching amplifiers and bit selection members which are fabricated on the same integrated circuit. The bit selection members include a shift register which, under the control of a selection instruction and a clock signal, sequentially selects a sequence of at least one bit location within a selected array row, the first bit location of the sequence being adapted to be set at random.

Four-pole circuit modules constructed in integrated injection logic (I.sup.2 L), each four-pole circuit having two signal inputs, a control input, and a signal output line. The signal output line is alternatively connected to one of the signal inputs by each of the two values of a bivalent control signal. This two-level logic can be used in multiplexers in which the four-pole circuits are successively arranged in two or more levels. A shift register composed of master-slave flipflops is obtained...

A string suitable for use in game rackets such as for tennis contains from two to four heavy denier monofilaments of an oriented synthetic polymer. Each monofilament has at least two opposite flattened sides throughout its length. The monofilaments are ply-twisted and bonded together along their lengths with each being bonded along a flattened side to at least one other such monofilament. Particularly suitable monofilaments have a substantially ribbon-shaped cross-section with a length-to-width ...

A novel integrated aquarium is disclosed wherein all of the necessary mechanical functions (air pump, lighting, heating) are located in a compartment provided as part of the aquarium base and those components particularly subject to mechanical failure are mounted in a slide-out drawer provided as part of said base so that they may be more easily repaired or replaced. In the preferred embodiment disclosed, an incandescent light bulb located in said base furnishes both light and heat to the aquari...

An integrated circuit comprising an inversely operated static induction transistor capable of performing very high speed operation at low power dissipation. In an integrated injection logic circuit, at least one of the injection and the output transistor is formed of a static induction transistor which has small storage effect of minority carriers in the channel region.

A house or other like structure is constructed out or ribbed concrete panels. In the outer walls a single ribbed panel is used with a thick overlying layer of insulation followed by a facade covering. Windows are double-paned and are installed in a concrete frame which is formed as part of the outside wall. The interior walls and floors have two ribbed panels facing one another, thus forming interpositional spaces between the ribs. By careful arrangement and interlocking of the ribbed panels, ci...

An integrated circuit wherein a gate circuit is provided on a bus line mounted on a semiconductor substrate. The gate circuit is used to separate an unused circuit block from other circuit blocks which are connected to a bus line through an input-output circuit for high speed data transmission, thereby reducing a parasitic capacity which might be imparted to the bus line by the separated circuit block. The input-output circuit is formed of a clocked inverter. The gate circuit is formed of a C.mu...

An integrated circuit provided with at least one field-programmable element matrix which is reduced in size and improved in an electrical characteristics is disclosed. The circuit is characterized in that the matrix is physically divided into at least two separate parts, at least a part of a logic circuit for applying a logic input to the matrix or for receiving a logic output from the matrix in a read mode is disposed outside of the separate parts of the matrix, and at least a part of a selecti...