Teradyne

About: Teradyne is a company organization based out in Boston, Massachusetts, United States. It is known for research contribution in the topics: Signal & Automatic test equipment. The organization has 828 authors who have published 999 publications receiving 15695 citations.

Remote test module for automatic test equipment

Abstract: A remote test module is disclosed for selectively interfacing a plurality of test channels between a tester interface and a plurality of specialized pins connected to a device-under-test. The tester interface is coupled to a test controller for generating predetermined test signals. The remote test module includes a signal conditioner responsive to the test controller for modifying said predetermined test signals into module test signals and applying the module test signals to the specialized pins of the device-under-test and a connection apparatus. The connection apparatus has a plurality of conductive paths for coupling the signal conditioner between the tester interface and the specialized pins.

Modular electrical connector and connector system

Abstract: A modular connector system for interconnecting printed circuit boards includes a first connector having an insulative housing supporting an array of blade-shaped contacts and a second connector having a complementary array of beam-shaped contacts. Preferably, each beam-shaped contact includes substantially independent coplanar beams which, in use, contact a common surface of a respective blade-shaped contact to provide multiple points of contact. The second connector includes a plurality of modules stacked in parallel. Each module includes a shield plate having an insulative receptacle attached at one end and a row of signal conductors, each having a beam-shaped contact at one end. Each insulative receptacle has a first side in which cavities are provided to receive the beam-shaped contacts of the signal conductor. Each insulative receptacle further includes a second, opposite side in which holes are formed in substantial alignment with the cavities for receiving the blade-shaped contacts of the first connector.

Uncoordinated Cooperative Jamming for Secret Communications

Abstract: We consider a Gaussian wiretap channel model with a single-antenna source, destination and eavesdropper. The communication is assisted by multiple multiantenna helpers that transmit noise to confound the eavesdropper. First, we consider a nulling scheme, in which each helper independently transmits noise, designed to maximize the system secrecy rate while creating no interference to the destination. In this scheme, each helper requires only local relay-destination channel state information (CSI). When global CSI is available at the relays, the nulling scheme is not optimal. The optimal jamming noise structure is also provided under global CSI. Interestingly, it is shown both analytically and via simulations that, despite its reduced CSI requirements, the nulling scheme may have secrecy rate performance that is very close to the optimal one. The probability of outage of the nulling scheme is provided in closed form based on the statistics of the eavesdropper CSI.

Calibrating laser trimming apparatus

Abstract: A laser trimming apparatus calibration system including controlling a laser beam positioning mechanism to move a laser beam to a desired nominal laser position, imprinting a mark on a medium to establish an actual laser position, comparing the imprinted mark with the desired nominal position and producing a result indicative of the difference between the actual position and the desired nominal position. The system further including providing an illuminated mark at a desired illuminated mark nominal position, controlling the laser beam positioning mechanism to direct an optical path to the desired illuminated mark position, establishing an actual illuminated mark position by directing light from the desired illuminated mark nominal position along the optical path to the detection device and comparing the actual illuminated mark position with the nominal illuminated mark position.

Capturing and evaluating high speed data streams

Abstract: A technique for capturing and evaluating high-speed serial data streams using conventional component testers includes a high-speed latching comparator coupled to the output of a device under test (DUT). The component tester stimulates the DUT to produce a high-speed serial data stream and strobes the latching comparator at predetermined instants of time relative to the serial data stream. The latching comparator samples the digital state of the serial data stream and holds the sampled state. The component tester reads and stores the held state. The tester samples the serial data stream at multiple locations in this fashion, and takes multiple samples at each location. The tester averages the samples acquired at each location to render a probability function of the serial data stream verses time. From the probability function, significant timing characteristics of the serial data stream can be deduced, for example, jitter, intersymbol interference, and eye closure.