Texas Instruments Corporation

Computer Service Technology, Inc.

Cecil C Ho

Claude Andrew Sharpe

Bruce A Butcher

Alexander G Bell

An apparatus is disclosed for automatically testing electronic memory modules. The electronic memory modules are automatically positioned, one at a time, in a test station position for registration with test contacts of a test connector assembly. The test connector assembly includes a mounting fixture which secures the test contacts, such that first ends of the test contacts are appropriately aligned for registering with surface contacts of the electronic memory modules. Second, opposite ends of the test contacts are mounted to a transition board. The transition board has first and second opposite edges, with the first edge having surface contacts which are closely spaced for registering with the test contacts, and the second edge having surface contacts which are more widely spaced than those on the first edge for registering with connector contacts of a tester module. Conductive traces extend between the surface contacts of the first and second edges of the transition board. A transition board stiffener mounting adapter extends forward of and laterally aside of an upper and lower brackets of the mounting fixture. The stiffener adapter has flat mounting surfaces which are disposed adjacent to a flat surface of the transition board and to which the transition board is rigidly secured, to stiffen the transition board and to rigidly mount the transition board to the mounting fixture. A mounting bar rigidly connects the stiffener adapter to two upwardly extending ears of the lower mounting bracket.

PCB Adapter for a test connector assembly for an automatic memory module

An auto notch system which automatically 'notch' filters up to four interference signals (interferers) in the band from 50 KHz to 150 KHz comprises a signal detector, an adjustable notch filter, a bandpass receiver and a digital controller, plus the software that runs in the digital controller. The signal detector circuit has an antenna, a preamplifier and a group of 'fixed' filters. The adjustable notch filters are four circuits, each includes an active notch type filter stage with a DAC (digital to analog converter) in series with the input resistor to allow gain control and another DAC that controls the current through a diode that is optically coupled to a light dependent resistor pair. The light resistor pair is in the filter loop and as the resistance varies the frequency response of the filter changes. Thus the frequency response is controlled by varying the diode current. The bandpass receiver is used to sense and amplify the signal output of the Loran bandpass filter or the signal output of the notch filters under control of the controller. The bandpass receiver is tuned by the controller to one 128 specific frequencies in the range from 50 KHz to 150 KHz. The controller tunes the bandpass receiver, selects its input signal source and controls the gain and frequency characteristics of the notch filters. The software commands these hardware functions.

Automatic interference canceling apparatus

A communications link having a position capability responsive to either a manual or remote control actuation. In one embodiment, a remote carrier has a navigation system for outputting signals representative of the carrier location or position. A frequency shift key (FSK) modulator is connected to the navigation system for tone coding the carrier position signals, a transmitter of a transceiver is connected to the modulator for transmitting the carrier position signals, and a position enable switch for controlling selectively the transmittal of the carrier position signals. In another embodiment, a base station is provided with a control station identification signal (ID) generator, an FSK modulator for tone modulating the station identification signal, and a transmitter connected to the FSK modulator for transmitting the tone modulated carrier ID signal, and a remote station is provided with a receiver mounted upon the carrier for receiving the ID signal, said receiver having a demodulator for demodulating the received carrier identification signals, means for recognizing the ID signal, enabling means for enabling a transmitter, a navigation system outputting position information, an FSK modulator connected to the navigation system for tone modulating the carrier position information, a transmitter for transmitting the position information, and in the base carrier a printer having an FSK demodulator connected to the receiver for demodulating and printing the carrier position information.

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Irving, TX, United States of America

Cecil C Ho