METHOD FOR DETECTING DEFECTS IN DIGITAL BLOCKS Russian patent published in 2005 - IPC

FIELD: measuring equipment.

SUBSTANCE: in turns, on each device, included in diagnosed block, feeding voltage amplitude is decreased in steps from nominal value E_nom to threshold value E_thri with step ΔE_n, while on each step of decreasing of amplitude of feeding voltage of device pseudo-random multi-digit code sets are sent to inputs of diagnosed block, consisting of logical zeroes and ones with even possibility of appearance of logical zero or logical one in each digit, received logic levels are recorded on outputs of diagnosed digital block and compared to standard levels, and when error frequency F_c appears, voltage value E_thri is recorded (functioning threshold) for each device and its functioning area is calculated on basis of feeding voltage ΔE_pi. Defective (potentially malfunctioning) device is detected on basis of lowest value in functioning area ΔE_pi, which is selected on basis of comparison of functioning areas of all devices, included in diagnosed digital block.

EFFECT: higher precision, higher efficiency.

1 dwg