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Experiment
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çŽãã©ã³ãžã¹ã¿ïŒ10ç¹ïŒçŸä»£ç€ŸäŒã®é»âŒŠæè¡ã¯ãã¹ãŠïŒã·ã³ãã«ãã€åŒ·âŒãªçŽ ⌊ã§ãããã©ã³ãžã¹ã¿ã«ãã£ãŠâœããããŠããããã©ã³ãžã¹ã¿ã¯ã¹ã€ãããå¢å¹
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å³1. nãã£ã³ãã«æ¥ååé»çå¹æãã©ã³ãžã¹ã¿ã®æš¡åŒå³ (å·Š)ïŒâœæµã«ããã€ã¡ãŒãžå³ (äžå€®), é»âŒŠåè·¯ã®èšå· (å³)ïŒå·Šå³ã®âœ®å°ã¯ãœãŒã¹ (S) ãšãã¬ã€ã³ (D) ã®éãæµããé»æµã✰ããé»æµçµè·¯ã®å¹
ã¯ã²ãŒã (G)ãšãœãŒã¹ (S) ã®éã«å ããããé»å§ã«äŸåããã
æ¥ååé»çå¹æãã©ã³ãžã¹ã¿ (JFET) ã¯ãpåããŒãã·ãªã³ã³-nåããŒãã·ãªã³ã³ãªã©ã®2çš®ã®åå°äœãæ¥è§ŠãããŠã€ãã£ãæ¥åã®æ§è³ªãå©âœ€ããŠãããJFETã§ã¯ããœãŒã¹ãšãã¬ã€ã³ã®éãæµããé»æµã¯çŽ°ãé»æµçµè·¯ãéãæããããã«ã§ããŠãããnãã£ã³ãã« FETã§ã¯ãã®é»æµçµè·¯ã¯nååå°äœã§ã§ããŠããããã®é»æµçµè·¯ã®å¹
ã¯ãã²ãŒããšãœãŒã¹ã®éã®è² ã®é»å§ ðGS = ðG â ðSã«ãã£ãŠæ£ç¢ºã«å¶åŸ¡ããããšãã§ãããðGSãâŒå®ã«ä¿ã£ããšãããœãŒã¹ãšãã¬ã€ã³ã®éãæµããé»æµã¯ããã¬ã€ã³-ãœãŒã¹éã®é»å§ ðDS = ðD â ðSã®âŸ®ç·åœ¢é¢æ°ãšãªãããããããã¬ã€ã³-ãœãŒã¹éã®é»å§ ðDSã〈ãããšãã¯ãé»æµã¯ ðDSã«âœäŸããJFETã¯ãªãŒã ã®æ³åã«åŸããåºâŒæµæð
DS = ðDS/ðŒDSã¯ã²ãŒã-ãœãŒã¹éã®é»å§ ðGSã«åŒ·ãäŸåãã次ã®ãããªæ³åã«åŸã:
ð
DS = ð
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1 â ðGS/ðP, (1)
ãã㧠ð
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ããåŒããæãããªããã«ããã³ããªãé»å§ã«ãããŠFETã¯é»æµãå®å
šã«é®æããããã㧠ðGS > ðPã®ç¯å²ã§ ðGSã®å€ãåºå®ãïŒðDSãå¢ãããšïŒãœãŒã¹-ãã¬ã€ã³éã®é»æµã¯ ðDSãšã®âœäŸé¢ä¿ããããã¯ããïŒãããšããã§ã»ãŒâŒå®å€ã«é£œåããããã«ãªãã飜åé å (ðGSã⌀ããé å)ã§ã飜åé»æµã¯ ðGSã«æ¬¡ã®ããã«äŸåãã:
ðŒDS = ðŒDSS (1 â ðGS/ðP)2 . (2)
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GS = ðGS/ðŒGS) ã¯æ¥µããŠâŒ€ãããå
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Page 2
Experiment
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JFET ãšåæ§ã«ïŒTFT ãã©ã³ãžã¹ã¿ã¯ç·åœ¢ã¢ãŒããšé£œåã¢ãŒãã® 2 ã€ã®åºæ¬äœåã¢ãŒãã«ãã£ãŠåäœãããJFETãšç°ãªããTFTã®å
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Page 3
Experiment
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Page 4
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Experiment
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Experiment
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Page 9
Experiment
Q1-9Japanese (Japan)
å³ïŒ. JFETã®ç¹æ§æ²ç·ã決å®ããããã®è£
眮ãç Žç·ã§å²ãŸããTFTãå«ãéšåã¯ããŒãBã§ã¯äœ¿ããããªããå³äžã®æ¿âŒå³ã¯ïŒJFETãã©ã³ãžã¹ã¿ã®ã²ãŒã (G)ïŒãœãŒã¹ (S)ïŒãã¬ã€ã³ (D) ã®âŸåãâœ
ã✰ããŠãããå³äžã®æ¿âŒå³ã¯âŒ©åãã¬ããããŒãã®âœ³ã®çµç·ã✰ããŠãããçªå·ä»ããããåã®ãã¹ãŠã®âœ³ã¯å
éšã§çµç·ãããŠããïŒä»ã®åã®âœ³ãšã¯çµ¶çžããŠããããã«ãã¡ãŒã¿ã®å³ã¯ç°¡ç¥åããããã®ã§ãããé©åãªæž¬å®ã¢ãŒããšæž¬å®ã¬ã³ãžããã«ãã¡ãŒã¿ã®å転ã¹ã€ããã§éžæããããšã
B.1 ãã©ã³ãžã¹ã¿ã®ã²ãŒããæ¥å°ç«¯âŒŠã«æ¥ç¶ããïŒðGS = 0ïŒã次ã«çŽæµé»æµïŒDCcurrentïŒã¢ãŒãã«ãããã«ãã¡ãŒã¿ã®âŒæ¬ã®ã±ãŒãã«ããã©ã³ãžã¹ã¿ã®ãã¬ã€ã³ã«æ¥ç¶ãããããâŒâœ
ã®ã±ãŒãã«ã§é»å§åå²åšã®æã⟌ãé»å§ãåŸããããã€ã³ãã«è§Šãããé»æµ ðŒDSã®å€ã解ç✀çŽã«èšâŒããã
0.2pt
B.2 ðGS = 0ã«ä¿ã£ããŸãŸïŒç°ãªãæ£ã®é»å§ããã¬ã€ã³ã«äžããå Žåã®é»æµ ðŒDSã枬å®ããã次ã«è² ã®é»å§ããã©ã³ãžã¹ã¿ã®ãœãŒã¹-ã²ãŒãéã«äžããïŒðGS < 0ïŒããã«åè·¯ãå€æŽãïŒðŒDS ããã¬ã€ã³-ãœãŒã¹éã«äžããæ£ã®é»å§ã®é¢æ°ãšããŠæ±ãã枬å®ãç¹°ãè¿ãã解ç✀çŽã®è¡šã«æž¬å®çµæãæžã蟌ãã
0.8pt
é»å§åå²åšã®åè·¯ãæµæã®âŒ©ããªã®è² è·ã«æ¥ç¶ãããŠãããšãïŒå³9ïŒã¯ïŒé»å§åå²åšã§äžããããé»å§ ð Loutã¯ïŒã€ã³ããŒãã³ã¹ã®âŒ€ããªé»å§èšã®ããã«æµæã®âŒ€ããªè² è·ã«æ¥ç¶ãããå Žåã®å
¬ç§°é»å§ ðoutãšç°ãªã£ãŠããã
Page 10
Experiment
Q1-10Japanese (Japan)
å³ïŒïŒè² è·ãæ¥ç¶ããé»å§åå²åš
B.3 é»å§åå²åšãæµæ ð
L ã®è² è·ã«æ¥ç¶ãããŠããå Žåãèãããè£æ£ä¿æ° ð =ð Lout/ðoutãð
L,ð
x,ð
yã®é¢æ°ãšããŠæ±ããã
0.2pt
JFETãã©ã³ãžã¹ã¿ã¯ïŒðGS = 0ïŒããªãã¡ð
0DS ⌠50 Ωã®ãšãïŒâŒ©ããåºâŒæµæããã€ããããïŒã²ãŒãããœ
ãŒã¹ã«å¯ŸããŠè² ã®é»å§ã«ãªããšïŒãã®æµæã¯âŒ€å¹
ã«å¢å ãããðGS < 0ã«å¯ŸããŠã¯ïŒåºâŒæµæã¯åŒ (1) ã§äžããããæ³åã«ã»ãŒåŸãã
B.4 é©åãªè£æ£ä¿æ°ã✀ããŠïŒðDSïŒããªãã¡ãã¬ã€ã³-ãœãŒã¹éã®é»å§éäžãB.2ã§æž¬å®ãããã¹ãŠã®ãã¬ã€ã³ç¹ã«ã€ããŠèšç®ããããã®èª²é¡ã§âœ€ãã JFET ã®å
¬ç§°å€ïŒð
0
DS = 50 Ω, ðP = â1.4 VïŒãèæ
®ããããšã
1.2pt
B.5 ✀ããJFETãã©ã³ãžã¹ã¿ã®åºâŒæ²ç· ðŒDS(ðDS)ããã¹ãŠæãã 0.5pt
B.6 ãã©ã³ãžã¹ã¿ã〈ãã ðDS ã§åäœããŠããå Žåãèãããç°ãªã ðGS ã«å¯Ÿãã✀ããJFETã®å®éšå€ð
DSãç°ãªã ðGSã«å¯ŸããŠæ±ãïŒçµæã®å³ãæãã
0.5pt
B.7 ✀ããJFETã® ðDS ⌠+3 Vã«ãããäŒéæ²ç·ãæãã 0.3pt
JFETãã©ã³ãžã¹ã¿ã飜åã¢ãŒãã§åäœããŠãããšãïŒé»æµ ðŒDSã¯åŒ (2) ã§è¡šãããæ³åã«ã»ãŒåŸãã
B.8 枬å®çµæããïŒâœ€ããçŽ âŒŠã® ðŒDSSãšãã³ããªãé»å§ ðPãæ±ãããå
¬ç§°å€ãšããŠäžãããã ðPãšâœèŒããã
0.4pt
JFETãã©ã³ãžã¹ã¿ãå¢å¹
åšãšããŠâœ€ããå Žåã®éèŠãªãã©ã¡ãŒã¿ã¯ïŒãããããã©ã³ãžã¹ã¿ã®çžäºã³ã³ãã¯ã¿ã³ã¹ ðã§ããïŒä»¥äžã®åŒã§äžããããã
ð = ððŒDSððGS
. (3)
âŒã€ã®å€æ°ããã€é¢æ° ð(ð¥, ðŠ)ã«ããããŠïŒðððð¥ 㯠ðŠãâŒå®ã«ä¿ã£ããšãã® ð ã® ð¥ã«ãã埮åãè¡šãã
Page 11
Experiment
Q1-11Japanese (Japan)
B.9 枬å®ããäŒéæ²ç·ããïŒâœ€ããçŽ âŒŠã® ðGS = â0.50 Vã«ãããçžäºã³ã³ãã¯ã¿ã³ã¹ãæ±ãããçµæãåŒ (2) ããåŸãããèšç®çµæãšâœèŒããã
0.4pt
Part C. çŽèèãã©ã³ãžã¹ã¿ (2.0ç¹)ããããã¯ïŒJFETã¯äœ¿ããªãã以äžã®ãã¹ãŠã®å®éšåé¡ã¯å°å·ãããåè·¯ã®äžåŽã®âŸã«ããçŽèèãã©ã³ãžã¹ã¿ (TFT)ã«ã€ããŠã®ãã®ã§ãããTFTã®ã²ãŒã (G)ããœãŒã¹ (S)ããã¬ã€ã³ (D)ã¯å³10ã«âœ°ãããŠãããTFTã®ã²ãŒããšãœãŒã¹ãæ¥å°ç«¯âŒŠã«æ¥ç¶ããããã®èª²é¡ã§ãå³ 10ã«âœ°ãããã«ïŒçŽ TFTã®ãœãŒã¹ã¯ä¹Ÿé»æ± ããã¯ã®å
±é端⌊ã€ãŸã 0 Vã«åžžã«æ¥ç¶ããããé»å§åå²åšã®âŒã€ã✀ããŠãã©ã³ãžã¹ã¿ã ðDS > 0ã®ç¶æ
ã«ããïŒå³10ïŒãé»æµãé»æµèšãæµããŠããããšã確èªããã
å³ 10. âçŽ TFTã®æž¬å®è£
眮ããã«ãã¡ãŒã¿ã®å³ã¯ç°¡ç¥åããããã®ã§ãããé©åãªæž¬å®ã¢ãŒããšæž¬å®ã¬ã³ãžããã«ãã¡ãŒã¿ã®å転ã¹ã€ããã§éžæããããšã
Page 12
Experiment
Q1-12Japanese (Japan)
C.1 ðDS = +3.0 V ãäžãããðGS = â3.0 V ãäžããŠãã©ã³ãžã¹ã¿ãé®æããããã©ã³ãžã¹ã¿ãé®æããããŸã§ 1åéåŸ
ã€ããšãæ®çããé»æµ ðŒclosedã®å€ã解ç✀çŽã«æžãã次㫠ðDS = +3.0 V ãä¿ã£ããŸãŸ ðGS = 0ãšããŠãã©ã³ãžã¹ã¿ãéããé»æµãæéã®é¢æ°ãšããŠæž¬å®ããããã©ã³ãžã¹ã¿ãéããçŽåŸã«éå§ãïŒå°ãªããšã5åéã¯æž¬å®ãããðŒDS(ð¡)ã®ããŒã¿ã解ç✀çŽã«éèšããã
0.8pt
C.2 ðŒDS(ð¡)ãå³âœ°ããããã®æéç¹æ§ã¯ïŒâŒâœ
ã®æå®æ°ïŒð2ïŒãä»âœ
ïŒð1ïŒãã⟮垞ã«âŒ€ããâŒã€ã®ææ°é¢æ°çŸè±¡ã®éãåããã«ãªã£ãŠãããçãâœ
ã®æå®æ° ð1ã決å®ããã
1.2pt
Part D. å転åè·¯ (1.5ç¹)é»âŒŠåè·¯ã§æãéèŠãªåè·¯ã®âŒã€ã¯ïŒããžã¿ã«âŒâŒãé転ããããšãã§ããå転åè·¯ã§ãããäŸãã°ïŒããðin = highã®å Žå㯠ðout=lowã§ããïŒãã®éã§ããããä»âŒåºŠâŸããïŒãã©ã³ãžã¹ã¿ã¯åè·¯ã®åºç€ã§ãããæãåçŽãªãã¶ã€ã³ã¯ïŒå³11ã«âœ°ãå
±éãœãŒã¹å¢å¹
åšãšåŒã°ããã®ã§ããïŒãã©ã³ãžã¹ã¿ãšè² è·æµæïŒð
LïŒã✀ããããã®å Žå㯠ðin=ðGSã§ïŒðoutã¯ãã©ã³ãžã¹ã¿ã®ãã¬ã€ã³é»æ¥µã®é»å§ã枬å®ããããã®ããã«ïŒãã®èª²é¡ã§ã¯ ðGSã-3 Vãã 0 VãŸã§å€åããããšãã«ïŒðoutã«äœãèµ·ãããã調ã¹ãã
å³11. å
±éãœãŒã¹å¢å¹
åšãšå転åè·¯
å³11ã®è£
眮ã§ã¯ïŒãã©ã³ãžã¹ã¿ã¯çŽTFTã§ããïŒð
Lã¯ãããã⌿äœæ¥ã§ä»ãå ããè² è·ã§ãããå³12ã«âœ°ãããã«ã²ãŒã端⌊ãšæ¥ç¶ã㊠ðin端⌊ãšãã端⌊ãšãã¬ã€ã³ç«¯âŒŠãšã®éã«éçã§è² è·ð
Lãæžããéçã§æžãããšã«ããïŒå°é»æ§é»éã®èãå±€ãèç©ãããããã®ããïŒããå€ãã®å±€ãæãã»ã©ïŒããäœãæµæãåŸããããð
Lãæãéã¯ïŒãã®æµæãç¶ç¶çã«ç¢ºèªããããšãðoutãã§ããã ã0 Vã«è¿ã¥ããããã«ã¯ïŒè² è·æµæã¯âŒåã«âŒ€ããå¿
èŠãããããã®ãããæµæãæããŠããéã¯ïŒð
L = 200 kΩãéæããããšã✬çãšãããéçã✀ã㊠ð
Lãæžå°ãããã ãã§ãªãïŒæ¶ããŽã ã§å¢å ãããããšãã§ããã✬çãšããå€ããã®å·®ã10%以äžã§ããããšã✬æšãšããã
Page 13
Experiment
Q1-13Japanese (Japan)
å³12. å転âå
±éãœãŒã¹å¢å¹
åšè£
眮ã®é
眮
å転åè·¯ïŒå³12åç
§ïŒãäœãããã«çŽTFTã®è² è·æµæã«âœ€ããð
L â 200 kΩã®ççŽ æµæãïŒä»å±ã®HBéçã✀ããŠâŒ¿ã§æãã
D.1 äœæããð
Lã®æž¬å®å€ã解ç✀çŽã«æžããççŽ æµæãšçŽTFTã✀ããŠå転åè·¯ïŒå³12ïŒãäœæããã枬å®åã«ãã©ã³ãžã¹ã¿ãå®å
šã«ãªãã«ããããã« ðGS = â3 VãäžããŠçŽïŒåéåŸ
ã€ããšãå¿ããªãããšã次㫠ðGSã â3 V ãã 0 V ãŸã§å€åãã㊠ðoutã枬å®ãããåç¹ã§æ⌀100ç§éã®å®å®åæéããããŠãã ðoutãèªã¿åãããšã枬å®çµæã解ç✀çŽã«æžãã
0.5pt
D.2 枬å®ãã ðout(ðin) é»å§äŒéæ²ç·ãæããããŒã¿ç¹ã®åŸåã✰ãæ»ãããªæ²ç·ãæãã
0.5pt