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Method of diagnosing integrated logic circuit    
United States Patent4996659   
Link to this pagehttp://www.wikipatents.com/4996659.html
Inventor(s)Yamaguchi; Noboru (Higashiyamato, JP); Nakamura; Hideo (Tokyo, JP); Hagiwara; Yoshimune (Hachioji, JP); Sato; Tsukasa (Hachioji, JP); Koizumi; Haruo (Tokyo, JP)
AbstractA method of diagnosis of an integrated logic circuit having function blocks, in which a test signal is supplied to the logic circuit; an input signal to and an output signal from at least one of the function blocks are detected by the use of a contactless probing device such as an electron beam probing device or laser beam probing device; simulation is carried out of a normal logic operation of the function block with the detected input signal to provide a simulated output signal; the detected and simulated output signals are compared with each other; and the function block is determined as being normal or abnormal according to the result of the comparison. When the function block includes plural logic elements, the cause of the abnormality may be traced back to a faulty function element by detecting the output of a function element by a contactless probing device, comparing the detected output with a corresponding simulated output and repeating the detection and comparison on other function elements in the function block until the comparison results in coincidence. The function element which receives the signal providing the coincidence as a result of the comparison is determined as the faulty function element.
   














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Drawing from US Patent 4996659
Method of diagnosing integrated logic circuit - US Patent 4996659 Drawing
Method of diagnosing integrated logic circuit
Inventor     Yamaguchi; Noboru (Higashiyamato, JP); Nakamura; Hideo (Tokyo, JP); Hagiwara; Yoshimune (Hachioji, JP); Sato; Tsukasa (Hachioji, JP); Koizumi; Haruo (Tokyo, JP)
Owner/Assignee     Hitachi, Ltd. (Tokyo, JP)
Patent assignment
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Publication Date     February 26, 1991
Application Number     07/084,153
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     August 12, 1987
US Classification     714/736 716/4
Int'l Classification     G01R 031/28
Examiner     Lall; Parshotam S.
Assistant Examiner     Ramirez; Ellis B.
Attorney/Law Firm     Antonelli, Terry, Stout & Kraus
Address
Parent Case    
Priority Data     Aug 20, 1986[JP]61-192884 Sep 19, 1986[JP]61-219169
USPTO Field of Search     364/579 364/580 364/578 371/23 371/25 371/26 371/25 324/73 R 250/396 R 250/492.21 250/22 250/23 250/24 250/25 250/26 250/27 250/28 250/29 250/30 250/31 250/32 250/33 250/34 250/35 250/36 250/37 250/38 250/39 250/40 250/41 250/42 250/43 250/44 250/45 250/46 250/47 250/48 250/49 250/50 250/51 250/52 250/53 250/54 250/55 250/56 250/57 250/58 250/59 250/60 250/61 250/62 250/63 250/64 250/65 250/66 250/67 250/68 250/69 250/70 250/71 250/72 250/73 250/74 250/75 250/76 250/77 250/78 250/79 250/80 250/81 250/82 250/83 250/84 250/85 250/86 250/87 250/88 250/89 250/90 250/91 250/92 250/93 250/94 250/95 250/96 250/97 250/98 250/99 250/100 250/101 250/102 250/103 250/104 250/105 250/106 250/107 250/108 250/109 250/110 250/111 250/112 250/113 250/114 250/115 250/116 250/117 250/118 250/119 250/120 250/121 250/122 250/123 250/124 250/125 250/126 250/127 250/128 250/129 250/130 250/131 250/132 250/133 250/134 250/135 250/136 250/137 250/138 250/139 250/140 250/141 250/142 250/143 250/144 250/145 250/146 250/147 250/148 250/149 250/150 250/151 250/152 250/153 250/154 250/155 250/156 250/157 250/158 250/159 250/160 250/161 250/162 250/163 250/164 250/165 250/166 250/167 250/168 250/169 250/170 250/171 250/172 250/173 250/174 250/175 250/176 250/177 250/178 250/179 250/180 250/181 250/182 250/183 250/184 250/185 250/186 250/187 250/188 250/189 250/190 250/191 250/192 250/193 250/194 250/195 250/196 250/197 250/198 250/199 250/200 250/201 250/202 250/203 250/204 250/205 250/206 250/207 250/208 250/209 250/210 250/211 250/212 250/213 250/214 250/215 250/216 250/217 250/218 250/219 250/220 250/221 250/222 250/223 250/224 250/225 250/226 250/227 250/228 250/229 250/230 250/231 250/232 250/233 250/234 250/235 250/236 250/237 250/238 250/239 250/240 250/241 250/242 250/243 250/244 250/245 250/246 250/247 250/248 250/249 250/250 250/251 250/252 250/253 250/254 250/255 250/256 250/257 250/258 250/259 250/260 250/261 250/262 250/263 250/264 250/265 250/266 250/267 250/268 250/269 250/270 250/271 250/272 250/273 250/274 250/275 250/276 250/277 250/278 250/279 250/280 250/281 250/282 250/283 250/284 250/285 250/286 250/287 250/288 250/289 250/290 250/291 250/292 250/293 250/294 250/295 250/296 250/297 250/298 250/299 250/300 250/301 250/302 250/303 250/304 250/305 250/306 250/307 250/308 250/309 250/310 250/311 250/312 250/313 250/314 250/315 250/316 250/317 250/318 250/319 250/320 250/321 250/322 250/323 250/324 250/325 250/326 250/327 250/328 250/329 250/330 250/331 250/332 250/333 250/334 250/335 250/336 250/337 250/338 250/339 250/340 250/341 250/342 250/343 250/344 250/345 250/346 250/347 250/348 250/349 250/350 250/351 250/352 250/353 250/354 250/355 250/356 250/357 250/358 250/359 250/360 250/361 250/362 250/363 250/364 250/365 250/366 250/367 250/368 250/369 250/370 250/371 250/372 250/373 250/374 250/375 250/376 250/377 250/378 250/379 250/380 250/381 250/382 250/383 250/384 250/385 250/386 250/387 250/388 250/389 250/390 250/391 250/392 250/393 250/394 250/395 250/396 250/397 250/398 250/399 250/400 250/401 250/402 250/403 250/404 250/405 250/406 250/407 250/408 250/409 250/410 250/411 250/412 250/413 250/414 250/415 250/416 250/417 250/418 250/419 250/420 250/421 250/422 250/423 250/424 250/425 250/426 250/427 250/428 250/429 250/430 250/431 250/432 250/433 250/434 250/435 250/436 250/437 250/438 250/439 250/440 250/441 250/442 250/443 250/444 250/445 250/446 250/447 250/448 250/449 250/450 250/451 250/452 250/453 250/454 250/455 250/456 250/457 250/458 250/459 250/460 250/461 250/462 250/463 250/464 250/465 250/466 250/467 250/468 250/469 250/470 250/471 250/472 250/473 250/474 250/475 250/476 250/477 250/478 250/479 250/480 250/481 250/482 250/483 250/484 250/485 250/486 250/487 250/488 250/489 250/490 250/491 250/492.23
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[0 after 0 votes]		4801879
Spicer
324/751
Jan,1989
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4791357
Hyduke
324/73.1
Dec,1988
[0 after 0 votes]		4773028
Tallman
714/736
Sep,1988
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4769817
Krohn
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Feb,1988
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Masuda
714/726
Sep,1986
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Conner
714/736
May,1984
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Giedd
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Oct,1971
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