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4766595 |
Fault diagnostic system incorporating behavior models
A fault diagnostic system for a unit under test is disclosed which features behavior models for incorporating design knowledge of the unit under test into the system so as to implement a...
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4763289 |
Method for the modeling and fault simulation of complementary metal oxide semiconductor circuits
A method for modeling complementary metal oxide semiconductor (CMOS) combinatorial logic circuits by Boolean gates taking into account circuit behavior effects due to charge storing and static...
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4763288 |
System for simulating electronic digital circuits
A simulation system for visual signal processing circuits is presented which provides a detailed, pixel level analysis of the timing while actually performing the simulation at the frame level....
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4759019 |
Programmable fault injection tool
A programmable fault injection tool (PFIT) for the texting of the diagnostic capabilities of a computer or digital processing system is disclosed. The PFIT is made up of event compare hardware and...
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4747102 |
Method of controlling a logical simulation at a high speed
In a method of controlling a logical simulation of a logic circuit comprising a plurality of logic elements which can be simulated by forming a shift register string, the logical simulation is...
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4744084 |
Hardware modeling system and method for simulating portions of electrical circuits
A hardware modeling system 10 simulates portions of electrical circuits 16, 18 utilizing actual hardware components in the simulation. Access to these hardware modeling elements 16, 18 is provided...
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4727545 |
Method and apparatus for isolating faults in a digital logic circuit
The method and apparatus for isolating faults in circuitry of a digital computer includes the use of a fault isolation generation program which provides a data base containing a list of possible...
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4727313 |
Fault simulation for differential cascode voltage switches
A method of simulating a differential cascode voltage switch circuit (domino circuit) by replacing each switch-level logic tree by a three-section Boolean tree. In each section, a switch is...
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4726023 |
Determination of testability of combined logic end memory by ignoring memory
A method of bounding, from above and below, the probability of uncovering a fault in a logic portion of an integrated circuit having embedded memory. The circuit must be designed according to a...
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4719626 |
Diagnostic method and apparatus for channel control apparatus
In a system where a central control unit, a main memory unit and a channel control unit are connected to a multi-bus, input/output control units are connected in series through the channel control...
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4715035 |
Method for the simulation of an error in a logic circuit and a circuit arrangement for implementation of the method
A method for the simulation of an error in a logic circuit which comprises a bus optionally connectible to different logic levels, utilizes the assistance of input bit patterns from which output...
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4669083 |
Apparatus for the simulation of the failure or satisfactory operation of a logic system
An apparatus for simulating the failure or satisfactory operation of a system having a plurality of interconnected components. These components are subject to events, such as failures or repairs...
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4654851 |
Multiple data path simulator
A multiple data path simulator for use with a data generator having a clock output and a data output including a data delay with a predetermined number of outputs, a data multiplexer for selecting...
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4631699 |
Firmware simulation of diskette data via a video signal
A data processing system includes a cathode ray tube (CRT) display subsystem and a floppy disk subsystem. The logic of both systems are verified by generating and transferring a fixed format stream...
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4601032 |
Test-generation system for digital circuits
In a system for generating tests for digital circuits, a fault simulator (16) simulates a fault-free version of the circuit and all expected faulty versions of it concurrently, basing its operation...
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4544879 |
Stimulus/measuring unit for DC characteristics measuring
A novel digitized measuring system is disclosed for the measurement of the DC parameters of a wide variety of electrical and electronic devices. A stimulus measuring unit (SMU) is disclosed which...
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4472804 |
Method and means for reliability and maintainability analysis
A failure simulation system utilizing fast failing units whereby system availability and reliability analysis can be completed in highly compressed periods of time. Each fast failing unit includes...
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4456994 |
Remote simulation by remote control from a computer desk
A data processing system, comprising several distributed processing units which are connected to a remote central monitor and test station in which the state of each distributed processing unit is...
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4397021 |
Multi-processor automatic test system
A test system utilizing a plurality of programmable test instruments each capable of executing portions of a test program with the test program being written in a compiler language such as ATLAS,...
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4380088 |
Tester for collision-detect circuitry
A tester for the collision detector of a transceiver for a multiple access data communications network using carrier-sense collision detection for controlling access to the network. A squelch...
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4308616 |
Structure for physical fault simulation of digital logic
A shift register connected to elementary gates is added to a digital network to form a fault simulator. The shift register and the additional gates can select a connection from the digital network...
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4228537 |
Method of and apparatus for automatic fault diagnosis of electrical circuits employing on-line simulation of faults in such circuits during diagnosis
This disclosure is concerned with the use of on-line simulation of circuit faults during diagnosis to generate a small part of a complete fault dictionary needed for diagnosis of the circuit, being...
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4156132 |
Automatic fault injection apparatus and method
An apparatus for simulating error conditions associated with an integrated circuit, the integrated circuit being an in-line component of an electronic circuit. The apparatus, in response to the...
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3780277 |
APPARATUS FOR PROPAGATING INTERNAL LOGIC GATE FAULTS IN A DIGITAL LOGIC SIMULATOR
An improved apparatus and method for propagating faults in a digital logic fault simulator. The method is a more accurate way of propagating internal faults through logic gates and flip-flops that...
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3775598 |
FAULT SIMULATION SYSTEM FOR DETERMINING THE TESTABILITY OF A NON-LINEAR INTEGRATED CIRCUIT BY AN ELECTRICAL SIGNAL TEST PATTERN
A system involving the use of fault simulation for determining whether a proposed non-linear integrated circuit is testable by a proposed incremental bilevel electrical signal test pattern. The...
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3715573 |
FAILURE ACTIVITY DETERMINATION TECHNIQUE IN FAULT SIMULATION
The failure activity determination technique of the present application represents a new approach to fault simulation designed to significantly reduce the time required to perform such simulations....
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3702011 |
APPARATUS AND METHOD FOR SIMULATING LOGIC FAULTS
Apparatus and method for simulating logic circuit faults. The logic circuit to be simulated is divided into blocks and digital representations of the interconnections in each block are stored in...
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3649910 |
METHOD AND APPARATUS FOR GENERATING DIAGNOSTIC INFORMATION
A system for generating a fault dictionary for electronic equipment, wherein apparatus is provided for selectively replacing integrated circuit units of the apparatus with fault generating devices...
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