Abstract: An automatic wire bonder for bonding at least one wire between a first predetermined location on a workpiece and a second predetermined location on a substrate on which the workpiece is carried includes a wire feeding head, and means for moving the head, in x, y, and z directions, relative to the workpiece, x and y being at least parallel to the plane of the workpiece and z being an elevation direction above the workpiece. Means are included for determining a z direction measurement between the first and second predetermined locations. The bonder is computer controlled to automatically dispense the wire and to configure it to a predetermined configuration to include a partially circular portion and an adjacent straight portion to be bonded between the first and second predetermined locations. The shape of the partially circular portion and the length of the straight portion are automatically determined by at least the z direction measurement.

Abstract: A switching regulator with controlled simulated load has a control which connects and disconnects the simulated load to the output of the regulator. The control is responsive to an error signal of a first comparator. A second comparator receives the output of said first comparator and produces a control signal for the simulated load when the regulator output reaches a predetermined level.

Abstract: A telecommunication switching system utilizing immediate-start type trunks assures the collection of dial pulse information in receiving registers, via a network connection, by employing a dial pulse delay within each such trunk circuit for holding dial pulses a predetermined period of time before transferring the pulse information to the registers via the established network connection.

Abstract: A laser having an active region capable of lasings at different wavelengths includes an optical resonator cavity bounded at one end by one of several different wavelength-selective gratings. An adjustable mirror selects one of the wavelength-selective gratings by optically aligning the active region with the selected wavelength-selective grating. The position of the adjustable mirror is controlled by a combination of open loop-closed loop control. The open loop control includes a staircase generator, the closed loop control includes reference mirrors coacting with a feedback reflector in the back of the adjustable mirror for directing a control beam onto a position sensor. The length of the optical resonator cavity is dithered to retune the cavity for each wavelength selection. The beams produced at the various wavelengths are used, for example, to measure the optical energy content in a gas dynamic laser medium.

Abstract: A circuit is illustrated for performing an increment function wherein a savings of parts is obtained by using an inverter for two different functions thereby decreasing land area required for implementing the integrated circuit on a chip.

Abstract: Apparatus is presented for logically combining two input signals in parallel operations to provide AND and OR as well as Exclusive OR outputs as part of the ALU function in a digital computer. The carry function is used in combination with the already generated signals of AND, OR and Exclusive OR to provide a carry output signal and a SUM signal through logic combining techniques. Thus, the entire ALU output is obtained in two stages of time delay and a great savings in components. In some computers, the outputs need to be passed through a four to one multiplexer to select the desired output.

Abstract: A circuit is presented designed specifically for use in complementary symmetry design techniques such as CMOS/SOS wherein inverting gate types are a preferred design. This design is obtained with a minimum of delay by changing gate types in the ripple carry path wherein alternating stages utilize NAND gates with the remaining ripple carry path stages using NOR gates. To accomplish this approach, the bit stages of the word utilizing the NOR gates must have the bits inverted before being applied to the incrementing circuit.

Abstract: Disclosed is a logic circuit with a plurality of AND logic elements, each including a plurality of Schottky diodes with each cathode connected to a logic input and the anodes connected in common to establish an AND output. A diode pull up FET is provided for each AND output, with the source connected to the AND output, the gate connected to the source, and the drain connected to a source of positive bias potential. An OR logic element includes a plurality of Schottky diodes with each anode connected to one of the AND outputs and the cathodes connected in common to establish an OR output, while a diode pull down FET has its drain connected to the OR output, with the gate connected to the source and the source connected to a source of negative bias potential. A level shifting diode is placed between the OR output and the pull down FET. An output FET is connected through its gate to the drain of the diode pull down FET, with the source connected to ground and the drain providing a logic output from the circuit.

Abstract: A replicator for a magnetic bubble domain device including a hairpin loop conductor element traversing first and second spaced apart bubble domain guide structures. The replicator functions to replicate a bubble domain travelling along the first bubble propagation path onto the second bubble propagation path in response to an activating signal on the conductor. The replicate guide structure includes two attractive cusp positions and one repulsive cusp position, so that the repulsive charged wall formed at the repulsive cusp position functions to sever a stretched bubble domain formed by the activating signal.

Abstract: Wave front deformations resulting, for example, from the interaction of a laser beam with a deformable mirror are measured by causing the beam, or a sampled portion thereof, to interfere with a reference beam having a slightly different frequency in order to produce interference patterns in a detection plane. Spaced-apart detectors in that plane brightness oscillation at the difference frequency; and relative phase differences in these oscillations are used to determine wave front tilt, spherical and astigmatic aberrations, and, possibly, other deformations. Control signals are provided for correcting these wave front deformations by controlling the surface contour of the deformable mirror. The measuring laser beam may intercept the mirror within and as part of a polarization-type interferometer, or the measuring beam may be derived from a high-energy beam.

Abstract: An automatic fault recovery system for a multiple processor control complex of a telecommunications switching system is disclosed. The fault recovery system has a hierarchical structure which deals with the occurrence of soft faults and localizes insofar as possible the effect of errors, with the goal of minimizing disruption of calls through the switching system. Included in the steps taken by the recovery system are rewriting memory locations in active memory units from standby memory units, switching between active and standby copies of memory units, bus units and central processor units, and instituting progressively more pervasive initializations of all the processors in the control complex. The recovery system includes an arrangement employing a memory block parity check for fast initialization. A time shared error detection and correction activity assures that standby copies of memory units are in condition to become active when required.

Abstract: An absolute-incremental hybrid shaft position encoder providing compacted high resolution. In the preferred embodiment an encoder track is superimposed by a shutter so as to make multiple track revolutions appear electrically as a single revolution.

Abstract: An n-way power divider, particularly useful where n.noteq.2.sup.x, includes an input and a plurality of outputs. The power applied to the input is coupled to the outputs, and phase shifters are associated with at least some of the outputs. The phase shift provided by each of the phase shifters is determined such that the reflected power waves from each of the outputs appearing at the input cancel. Because the circuit is reciprocal, it can also be used as a signal combiner with appropriately phased power-wave vectors at the inputs.

Abstract: A digital display updated by inputs from a manual control having a plurality of tactile detents. A counter is loaded with a predetermined number and then decremented at a fixed rate until the number reaches one. The fixed rate is either the program cycle time of a microprocessor embodiment or the clock time of a circuit embodiment. Whenever a detent of the control is detected, the then current value of the counter is added to or subtracted from the display and the counter is again loaded with the predetermined number.

Abstract: Disclosed is a method for evaluating the structural integrity of an object, including the steps of generating a lowest order horizontal shear wave in the object, detecting the wave after it has propagated through the object, time gating the detected signal to reject nonuseful portions, Fourier transforming the time response of the detected signal into a frequency dependent response, and predicting the structural integrity of the object from the characteristics of the frequency response.

Abstract: A faceplate assembly is provided for use in printed circuit board assemblies comprising a printed circuit board with electrical contact surfaces, and a housing frame with slotted guide rails to receive the circuit board, and edge connector means fastened to the housing frame and displaced at the end of the guide rails. The faceplate assembly includes insertion, extraction and positive latching means molded as an integral part of the faceplate. The faceplate body extends substantially the entire length of the printed circuit board edge and is pivotally mounted to the printed circuit board near one corner thereof. The insertion/extraction means, located on the pivotal end of the faceplate body, is actuated by manual pivotal movement of the faceplate thereby causing the insertion/extraction means to coact with a housing frame U-channel to thus effect engagement or disengagement of the printed circuit board electrical contacts to or from the housing frame edge connector contacts.

Abstract: Deposition of ordered polycrystalline films of zinc oxide and other materials having a strongly preferred crystal growth direction and a high degree of symmetry about the preferred direction is achieved consistently by disposing a charged electrode in a sputtering chamber to limit bombardment of the film and underlying substrate by charged particles.

Abstract: A double drift IMPATT diode is formed from two semiconductors having different band gaps and carrier mobilities. The avalanche portion of the diode is created in the semiconductor having the lower band gap. The electron drift portion is created in the semiconductor having the higher electron mobility and the hole drift portion is created in the semiconductor having the higher hole mobility. This decreases the voltage required across the avalanche portion, decreases the series resistance, and thus increases the efficiency of the diode.

Abstract: In an autothrottle system for multiengine aircraft having separate throttle servos for each engine and servo tracking means for detecting and compensating for servo drift during autothrottle mode of operation, a pressure sensitive switch on each throttle handle for temporarily disengaging the autothrottle system and establishing a new reference for servo tracking means in response to manual adjustment of throttles by the pilot.

Abstract: In conjunction with the use of a float-zone crystal grower for doping silicon, a holder for temporarily storing pellets of solid dopant is disposed outside the housing of the crystal grower. A rotatable cylinder in the holder is provided with a plurality of chambers into which charges of varying amounts of dopant may be stored. A separate charge of dopant is propelled by inert gas under pressure into the melt zone of a silicon rod in the crystal grower upon the occurrence of a specified event such as passage of time or translation of the silicon rod. The apparatus and method are particularly applicable to doping with a highly volatile dopant such as indium.