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Document 2589547
AN-356
ᆌᆩԴऻ
0/&5&$)/0-0(:8":t10#09t/03800%."44"$)64&554t
ᆩࢽኸళǖሏ໙‫ٷݣ‬ഗࡀ֖߭ຕ‫ڦ‬ᆌᆩࢅ֪ଉ
ፕኁǖ3BZ4UBUB
६ᇀሏ໙‫ٷݣ‬ഗ‫֖߭ࡀڦ‬ຕժ࿮़ۨ‫ڦ‬ՔጚLjԨ࿔ॽ༪ஃ
ADIࠅິᆩઠۨᅭሏ໙‫ٷݣ‬ഗ༬Ⴀ‫ڦ‬ຍᇕLjཞ้༑༪ሞॽ
ᅙ݀քຕ਍ᆌᆩᇀํा‫ۉ‬ୟ้Ⴔᄲጀᅪ‫ڦ‬၌዆๚ၜă࿢்
ॽ৑ଉߴ‫؜‬ᆩઠ֪ଉኄၵ֖ຕ‫֪ڦ‬๬‫ۉ‬ୟă৑࠶ኄၵ֪๬
‫ۉ‬ୟ๢ᆩᇀ‫ܠ‬ዖሏ໙‫ٷݣ‬ഗLj‫ڍ‬๟LjၟFETĂቘհ࿘ۨई
‫੺ג‬ၚᆌ‫ٷݣ‬ഗኮૌ‫ڦ‬༬๺‫ٷݣ‬ഗ੗ీᄲ൱߸߀ॺᅱ‫ۉ‬ୟ
ኵLjईኁሞగၵ൧઄ူLj੗ీᄲ൱֑ᆩփཞ‫֪ڦ‬๬‫݆ݛ‬ઠ
֪ଉഄࡀ֖߭ຕăᅃཉཚႜ݆ሶ๟Lj৊ႜኄૌ֪ଉ้໯ᆩ
‫ۉ‬ᇸᆌਏᆶሀ0.1%‫ڦ‬၍ୟࢅ޶ሜۙবLjܸ࿖հሶփ‫ࡗגڥ‬
ຕࡹ‫ޚ‬ă
཮1ߴ‫؜‬କᅃዖሏ໙‫ٷݣ‬ഗ‫ڦ‬०ࣅ‫ڪ‬ၳ‫ۉ‬ୟLjഄዐቛ๖କ
Ԩ࿔༪ஃ‫ܠڦڟ‬ዖဃֶઠᇸăࡀ֖߭ຕᆌᅜԨ཮ྺ֖੊Lj
֍ీᇨ֪ഄሞԿ࣍‫ۉ‬ୟዐ‫ڦ‬ፕᆩă‫ܔ‬ᇀ‫ٷݣ܋ڇ‬ഗLj੗्
ۨኟटईཞ၎๼෇‫܋‬থ‫ں‬ă
ਸ࣍ሺᅮ
ߵ਍ۨᅭLjਸ࣍ሺᅮAኸ๼‫ۉ؜‬უᇑ๼෇‫܋‬क़ဃֶ‫ۉ‬უeε
ኮԲ)ස཮1໯๖*ăᅃӯ‫ں‬LjৈDC (Ao)‫ت‬Ք௽ሺᅮLj‫ڍ‬ሞ
Ⴙ‫ܠ‬ᆌᆩዐ)ԲසAC‫ٷݣ‬ഗ*Ljሺᅮໜೕ୲‫ڦ‬Վࣅᄺๆ‫ݴ‬ዘ
ᄲăएᇀُLj࿢்ߴ‫؜‬କ௅߲‫ٷݣ‬ഗ‫ۆڦ‬႙ਸ࣍ሺᅮၚ
ᆌă‫ܠ‬ຕ‫ٷݣ‬ഗ‫ڦ‬ਸ࣍ሺᅮၚᆌ੗ཚࡗ཮2൱‫؜‬ഄৎຼ
ኵă
ገሜጲĖఇె‫ࣆܔ‬ė1-3 1967
Rev. 0 | Page 1 of 8
཮1. ሏ໙‫ٷݣ‬ഗ‫ڪ‬ၳ‫ۉ‬ୟ
www.BDTIC.com/ADI
ሏ໙‫ٷݣ‬ഗ 13-3
AN-356
ᆌᆩԴऻ
཮2. ‫ۆ‬႙ਸ࣍ሺᅮၚᆌ
཮4. Կ࣍‫ۉ‬ୟ
཮3. ਸ࣍ሺᅮ֪๬‫ۉ‬ୟ
཮5. ਸ࣍ሺᅮ‫ڦ‬ඓۨ
ਸ࣍ሺᅮໜ޶ሜፆੇ(RL)Ă࣍ৣ࿒‫ۉࢅ܈‬ᇸ‫ۉ‬უܸՎࣅă
ᅃӯ‫ں‬Ljሞ‫޶ۨܮ‬ሜᇑ࿮޶ሜཉॲူLjਸ࣍ሺᅮ‫ڦ‬Վࣅ‫ޗ‬
‫܈‬փࣷ‫ࡗג‬10Ԡă‫ܠ‬ຕሏ໙‫ٷݣ‬ഗਏᆶኟሺᅮ࿒‫܈‬ဣຕLj
ሀྺ0.5዁1%/°CLjሺᅮໜ‫ۉ‬ᇸܸՎࣅ‫܈ޗڦ‬ሀྺ2%/%ă
ADIࠅິ֪ۨ‫ڦ‬໯ᆶਸ࣍ሺᅮ਩एᇀ‫޶ۨܮ‬ሜĂ25°Cࢅ‫ܮ‬
ۨ‫ۉ‬უă
཮3໯๖ྺᆩᇀ֪ଉᅃۨೕ୲‫ڦాྷݔ‬ਸ࣍ሺᅮ‫ํڦ‬ᆩ‫ۉ‬
ୟă޶๼෇‫ݴڦ܋‬უഗ๑ဃֶ‫ۉ‬უ‫ڦ‬ଳ௺‫܈‬ሺे100ԠLj
ᅺܸ੗֪ଉፌߛ100ྤ‫ڦ‬ሺᅮă‫گ‬ೕူLjਸ࣍ሺᅮ࢛ۨփ
ՎǖDCሺᅮ੗ཚࡗ‫گ‬ೕ႑ࡽ)ሀ5Hz*֪ଉă‫گ‬ሺᅮ‫ٷݣ‬ഗ
)20,000ᅜူ*փᅃۨႴᄲ‫ݴ‬უഗLjփॺᅱᆩᇀ֪ଉਸ࣍ሺᅮ
ড‫ߛڦگ‬ೕሺᅮă
न๑ሞፌࡻ‫ڦ‬൧઄ူLjሯำᆖၚᄺ๟ߛሺᅮ֪ଉ‫ڦ‬࿚༶ኮ
ᅃLjՂႷๆ‫ݴ‬ၭ႐Ljᅜᆶၳ‫ں‬ೡԸ֪๬‫ۉ‬ୟăߛೕူLjՂ
Ⴗই‫گ‬๼‫ۉ؜‬უ‫܈ޗڦ‬LjᅜՆ௨‫ٷݣࡗג‬ഗ‫ڦ‬უӦ୲ăᅺ
ُLjᆌۙኝ๼‫ۉ؜‬უLjᅜ๑ex)‫ރ‬ኵ*<უӦ୲/ωiLjഄዐLjωi
ྺ֪๬ೕ୲ă
ਸ࣍ሺᅮ‫ڦ‬ᅪᅭ
ሏ໙‫ٷݣ‬ഗ࢔ณ๑ᆩਸ࣍Ljܸ๟ሞ‫ٷݣ‬ഗዜྷཚࡗ޶‫ݒ‬ઍ
ઠ༵ߛ‫ۉ‬ୟ৛‫܈‬ăኄ৽ᆅ෇କଷᅃ߲ຍᇕLjनԿ࣍ሺᅮ
(G)Lj՗๖‫ݒټ‬ઍ‫ۉ‬ୟ‫ڦ‬ሺᅮă཮4ዐ‫ڦ‬०‫ݒڇ‬၎‫ٷݣ‬ഗຫ
௽କኄᅃ‫ۅ‬ă
ሏ໙‫ٷݣ‬ഗ 13-4
၍Ⴀ‫܈‬Ăሺᅮ࿘ۨႠĂ๼‫؜‬ፆੇࢅሺᅮ৛‫ۼ܈‬੗ཚࡗ‫ݒ‬ઍ
ଉઠ߀฀ă཮5ႚၡ‫ں‬ቛ๖କਸ࣍ሺᅮᇑԿ࣍ሺᅮኮक़‫ڦ‬
࠲ဣă
ਸ࣍ሺᅮ‫؜ג‬Կ࣍ሺᅮև‫ݴ‬ԥ‫࣍ྺ׬‬ୟሺᅮă)dB३݆‫ڪ‬
ၳᇀ໙ຍ‫݆أ‬ă*‫ݒ‬ઍ‫ܔ‬ਸ࣍Ⴀీ‫ื༵ڦ‬ᇑ࣍ୟሺᅮ኱থ‫ׯ‬
Բ૩ăᅃӯ‫ں‬Lj‫ܔ‬ᇀዐ৛‫܈‬LjሞణՔೕ୲ူLjਸ࣍ሺᅮᆌ
ԲԿ࣍ሺᅮ‫ٷ‬100Ԡ)न࣍ୟሺᅮ= 100*ă‫ܔ‬ᇀডߛ৛‫܈‬Lj࣍
ୟሺᅮᆌ‫ٷ‬1000Ԡईᅜฉăਉ૩ઠຫLj࿢்മ௬༵‫ܠڟ‬ຕ
ሏ໙‫ٷݣ‬ഗ‫ڦ‬ਸ࣍ሺᅮ࿘ۨႠሀྺ1%/°Căැ࣍ୟሺᅮྺ
100LjԿ࣍ሺᅮ࿘ۨႠᆌ‫ٷ‬ᇀ100ԠLj၎‫ړ‬ᇀ0.01%/°Căૌ
ຼ‫ں‬LjԿ࣍๼‫؜‬ፆੇᆌԲ࣍ୟሺᅮྺ100‫ڦ‬ਸ࣍๼‫؜‬ፆੇ
ၭ100Ԡă
‫ۨܮ‬๼‫ۉ؜‬უࢅ‫ୁۉ‬
‫ۨܮ‬๼‫ۉ؜‬უEo ኸሞ‫ۨܮ‬๼‫ူୁۉ؜‬Ljሞ‫؜‬၄ၥհ၄ၡई
ࡗ‫ݥٷ‬၍Ⴀ‫܈‬ኮമ‫ڦ‬ፌ‫ރٷ‬ኵ๼‫ۉ؜‬უăኄၜኸՔሞ‫ۨܮ‬
‫ۉ‬ᇸ‫ۉ‬უူ֪‫ڥ‬Ǘഄ໱‫ۉ‬ᇸ‫ۉ‬უူLj๼‫ॽ؜‬ሞ‫ۉ‬ᇸ‫ۉ‬უሀ
4V‫ాྷݔ‬Ӧ‫ۯ‬ăଷྔLj๼‫ۉ؜‬უӦ‫ॽޗ‬ሞড‫޶گ‬ሜ‫ူୁۉ‬
୼ྲे‫ٷ‬ă‫ۨܮ‬๼‫ୁۉ؜‬Ioኸሞ‫ۨܮ‬๼‫ۉ؜‬უူ‫ڦ‬ፌၭԍ
ኤ‫ୁۉ‬ኵă੗๑ᆩ‫گ‬ᇀEo /I o ‫޶ڦ‬ሜፆੇLj‫ڍ‬E o ࣷໜኮই
‫گ‬Lj฿ኈ੗ీሺेLjਸ࣍ሺᅮሶࣷ३ณăሞߛೕူൻ‫ٷۯ‬
‫ۉ‬ඹ޶ሜࣷ‫ڞ‬ዂ‫޶گ‬ሜፆੇLjժ੗ీ‫ۨܮࡗג‬๼‫ୁۉ؜‬ă
ዮස཮3ई཮6ኮૌ‫ڦ‬०Ս‫ۉ‬ୟ‫ۼ‬੗ᆩઠ֪ଉEoࢅIoă
Rev. 0 | Page 2 of 8
www.BDTIC.com/ADI
AN-356
ᆌᆩԴऻ
‫ڇ‬࿋ሺᅮၭ႑ࡽၚᆌ
੗९LjუӦ୲Sࢅඇࠀ୲ၚᆌfp‫࠲ڦ‬ဣ‫ٷ‬ዂ੗ཚࡗ‫ڪ‬๕1՗๖ǖ
‫ڇ‬࿋ሺᅮၭ႑ࡽၚᆌgtኸਸ࣍ሺᅮՎ‫ڇׯ‬࿋ईଭdB้‫ڦ‬ೕ
୲)९཮2*ăഄዐLj“ၭ႑ࡽ”՗๖Ljሞᅃӯ൧઄ူLjሞߛೕ
ူ࿮݆ൽ‫ڦٷڥ‬๼‫ۉ؜‬უӦ‫ޗ‬LjᅺྺუӦ୲၌዆ࣷ‫ڞ‬ዂ฿
ኈăᅺُLjሞߛೕူ֪ଉftࢅ๑ᆩ‫ٷݣ‬ഗ้LjՂႷ‫ܔ‬๼‫؜‬
‫ۉ‬უӦ‫ेޗ‬ᅜ၌ۨLjՆਸუӦ୲၌዆ăኄ৽ᅪ࿆ጣLjሞ‫ڇ‬
࿋ሺᅮೕ୲g t,ူLjኟ၀႑ࡽ‫ރڦ‬ኵ๼‫ۉ؜‬უՂႷ‫گ‬ᇀS/2π
ftLjഄዐS՗๖უӦ୲ă
‫ܔ‬ᇀ߳๼෇‫܋‬ਏᆶ‫׬ܔ‬ၚᆌ‫ٷݣڦ‬ഗLjft़੗ཚࡗ཮6໯๖
‫ݒ‬၎‫ۉ‬ୟ৊ႜ֪ଉLjᄺ੗૧ᆩ཮7໯๖ཞ၎‫ۉ‬ୟेᅜ֪
ଉăዮසቘհ࿘ۨ‫ٷݣ‬ഗई੻‫ٷݣټ‬ഗኮૌ֑ᆩമઍยऺ
‫ڦ‬ഗॲܸჾLjৈሞ޶๼෇‫܋‬ਏᆶড੺ၚᆌLjኄ৽၌዆କ‫ݒ‬
၎‫ۉ‬ୟ‫֪ڦ‬๬ࢅ๑ᆩă൩ጀᅪLj཮6ዐLj๴‫ݒ‬ઍྪஏेሜ
‫ڦ‬ᆖၚLjԿ࣍‫ڇ‬࿋ሺᅮၚᆌሀྺਸ࣍‫ڇ‬࿋ሺᅮၚᆌ‫ڦ‬ᅃ
ӷă‫ُأ‬ᅜྔLjড‫ݒٷ‬ઍ‫ۉ‬ፆኵLjසࡕ‫ٲ‬ሜሗො‫ۉ‬ඹLj੗
ీ‫ڞ‬ዂԿ࣍ၚᆌই‫گ‬LjᅺܸLjRf‫ڦ‬ኵ৽ᆌ৑੗ీၭLjഄ၌
‫܈‬ᆯ๼‫ీୁۉ؜‬૰Ioยۨă
ᆶ้Ljg tԥ‫ڇྺ׬‬࿋ሺᅮ‫੻ټ‬ओLjन੗एᇀ޿ຕኵᇨ֪ഄ
໱ೕ୲ူ‫ڦ‬ਸ࣍ሺᅮă඗ܸLjኻᆶ‫ټ‬6dB/Ԡೕࡐই‫ٷݣڦ‬
ഗLjሺᅮ‫੻ټ‬ओ֍๟‫׉‬ຕă‫ܔ‬ᇀ੺໏ࡐই‫ٷݣ‬ഗLjሺᅮ‫ټ‬
੻ओໜሺᅮܸሺेLjྺُLj࿢்݀քକਸ࣍ၚᆌ൸၍Ljᅜ
ႚၡ‫ں‬ቛ၄߳ೕ୲ူ‫ۆڦ‬႙ሺᅮă
de o
= 2πf p E o = S
dt max
(‫ڪ‬๕1)
‫ۉړ‬უӦ‫ޗ‬ই዁‫ۨܮ‬๼‫؜‬Eoᅜူ้Lj߾ፕೕ୲੗ీࣷӀԲ૩
ืߛLjܸփ‫ࡗג‬უӦ୲Săሞ၌ۨ‫ాྷݔ‬Lj߾ፕೕ୲থৎ‫ڇ‬࿋
ሺᅮ‫੻ټ‬ftLj၎ᆌ‫ۉ‬უ႑ࡽሶਦۨ“ၭ႑ࡽ”‫ڇ‬࿋ሺᅮၚᆌ‫ڦ‬ፌ
‫ރٷ‬ኵ‫܈ޗ‬ă཮6ई཮7໯๖‫ۉ‬ୟ੗ᆩᇀ֪ଉඇࠀ୲ၚᆌLjਏ
༹ൽਦᇀ֪ଉ‫ڦ‬๟‫ݒ‬၎࣏๟ཞ၎֖ຕăሞ๼‫؜‬प‫ۯ‬ༀԏࢅ๟
ዷᄲუӦ୲၌዆ᅺ໎้Ljଇዖ‫ۉ‬ୟ‫؜ߴॽۼ‬၎‫ڦڪ‬঳ࡕă‫ܔ‬
ᇀट੺ၚᆌ‫ٷݣ‬ഗLj޶ሜ‫ۉ‬ඹࢅ/ईٗ๼‫޶ڟ܋؜‬๼෇‫ۉڦ܋‬
ඹॽ‫ڞ‬ዂ௽၂‫ڦ‬უӦ୲၌዆Ljܸٗ३஥ඇࠀ୲ၚᆌăഄᇱᅺ
๟ሞኄၵ‫ۉ‬ඹ؊‫ٷݣ้ۉ‬ഗ๼‫ୁۉ؜‬ԏࢅLjᅺُLjُૌ‫ۉ‬ඹ
‫ڦ‬ኵՂႷড‫گ‬ă
๼‫؜‬฿ኈ੗ཚࡗ๼‫ڦ܋؜‬฿ኈऺLjᄺ੗ཚࡗ࠵֪๖հഗฉ‫ڦ‬
૧ු඿(Lissajon)཮ႚઠ֪ଉă‫ܔ‬ᇀਦۨඇࠀ୲ၚᆌ၌዆‫ڦ‬฿
ኈ຤ೝLjᄽాඍ݄ᅃ߲ࠅණ‫ڦ‬ՔጚኵLj‫ڍ‬๟Lj1%዁3%๟Բড
ࢇ૙‫ڦ‬ăሞُLjႴᄲጀᅪ‫ڦ‬๟LjԿ࣍๼‫؜‬฿ኈൽਦᇀ‫ݒ‬ઍई
࣍ୟሺᅮଉLjᄺൽਦᇀ֪ଉ‫ڦڟڥ‬Կ࣍ሺᅮăඇࠀ୲ၚᆌᅃ
ӯሞ‫ڇ‬࿋ሺᅮူLjन࣍ୟሺᅮፌߛ้৊ႜ֪ଉă‫ܔ‬ᇀཞᅃඇ
ࠀ୲ၚᆌೕ୲LjሞডߛԿ࣍ሺᅮူLj๼‫؜‬฿ኈࣷሺेă
ඇࠀ୲ၚᆌ
ሏ໙‫ٷݣ‬ഗ‫ٷڦ‬႑ࡽࢅၭ႑ࡽၚᆌ༬Ⴀᅺ‫ۯ‬ༀ‫ݥ‬၍Ⴀ‫܈‬ई
ຨक़ԏࢅܸ٪ሞ਎‫ֶٷ‬ᅴă‫ٷݣ‬ഗ‫ٷܔ‬႑ࡽ‫ڦ‬ၚᆌ໏‫܈‬஥
ᇀၭ႑ࡽ‫੻ټ‬༬Ⴀ‫ڦ‬ᇨ֪໏‫܈‬ăሰ‫ٷׯ‬႑ࡽၚᆌ၌዆‫ڦ‬ፌ
ዷᄲᅺ໎๟๼‫؜‬पዐ‫ڦ‬უӦ୲၌዆ăൻ‫ۉۯ‬ୟ‫ۯڦ‬ༀ‫ྷݔ‬
၌዆କ‫ۉ‬ୟࢅৗ༹࠶‫ۉ‬ඹ‫ڦ‬؊‫ۉݣࢅۉ‬໏‫܈‬ăᆯᇀ๼෇प
ࡗሜईࠌఇ‫ۉ‬უუӦ୲၌዆Ljຨक़ԏࢅᄺ੗ీ‫؜‬၄ሞ‫ٷݣ‬
ഗ‫ڦ‬๼෇पዐLj‫ڍ‬ᇑ๼‫؜‬पԏࢅ၎ԲLjኄժփ๟߲࿚༶ă
ඇࠀ୲ၚᆌfpኸሞ‫ڇ‬࿋Կ࣍ሺᅮူ֪‫ڦڥ‬ፌ‫ٷ‬ೕ୲Ljժ੗
इ‫޶ۨܮڥ‬ሜူ൐უӦ୲၌዆փࣷ‫ڞ‬ዂ฿ኈ้Ljኟ၀႑ࡽ
‫ۨܮڦ‬๼‫ۉ؜‬უ±Eoă൩ጀᅪLjԨ֖ຕᇑሺᅮໜೕ୲ܸူ
ই้‫“ڦ‬ၚᆌ”ժ࿮࠲ဣă၎‫ݒ‬Lj޿֖ຕৈኸ๼‫؜‬႑ࡽዐᆯ
უӦ୲၌዆‫ڞ‬ዂ‫ڦ‬฿ኈă‫ܔ‬ᇀኟ၀႑ࡽLj‫ۉ‬უՎࣅ‫ڦ‬ፌ‫ٷ‬
ၽ୲ई໏୲݀ิሞଭ঍ሁ้Ljժᇑ‫ރ‬ኵ‫ࢅ܈ޗ‬ೕ୲‫װ‬Բ૩
࠲ဣă
Rev. 0 | Page 3 of 8
཮6. ᆩᇀ֪ଉgt Ăfp ĂSĂT‫ݒڦ‬၎‫ۉ‬ୟ
཮7. ᆩᇀ֪ଉgt Ăfp ĂSĂTĂEcm ‫ڦ‬ཞ၎‫ۉ‬ୟ
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ሏ໙‫ٷݣ‬ഗ 13-5
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ᆌᆩԴऻ
ሞႹ‫ܠ‬ᆌᆩዐLjᅺ‫ࡗג‬ඇࠀ୲ၚᆌܸ‫ڞ‬ዂ‫ྔܮڦ‬฿ኈᅃӯ
੗ࢮ୼փऺă඗ܸLjঢ়‫׉‬ԥࢮ୼‫ڦ‬ᅃዖ߸ჹዘ‫ڦ‬ၳᆌ๟Lj
ᅺ‫ݒ׬ܔݥ‬ઍհႚኝୁLjईኁᅺሞ൱ࢅ‫ۅ‬ၠ๼෇पሜ෇ࡗ
‫ٷܠ‬฿ኈ႑ࡽܸ‫ڞ‬ዂ‫ࡗג‬ඇࠀ୲ၚᆌ้Lj੗ీׂࣷิ኱ୁ
฿ۙ‫ۉ‬უă
֪ଉඇࠀ୲ၚᆌ้‫ڦ‬ኄၵဦྲኮ‫ت‬ᅜतӵໜޭၳᆌ՗௽Lj
཮8໯๖‫ۉ‬ୟ๟߸ࡻ‫֪ڦ‬๬‫ۉ‬ୟăཚࡗ࠵֪๖հഗฉ൱ࢅ
‫ڦۅ‬ဃֶ‫ۉ‬უLj੗ᅜ߸ඹᅟ‫ں‬ॠ֪‫ڟ‬฿ኈ႑ࡽLj੗ᅜၩ‫أ‬
֪ଉዐ‫ڦ‬႑ࡽ݀ิഗ฿ኈLjժ੗ൟ຿࠵ִ‫ڟ‬ೕ୲Ⴀ኱ୁ฿
ۙă
უӦ୲
ᅜฉ߳ব༌‫ڟ‬କ‫ڞ‬ዂუӦ୲၌዆‫ڦ‬ᇱᅺăუӦ୲Sཚ‫׉‬՗
๖ྺv/μsLj՗๖‫ٷ‬঩ሂՎࣅ๼‫ۉ؜‬უ‫ڦ‬ፌ‫ٷ‬Վࣅ୲ă
‫ڪ‬๕1๟ᅃዖ֪ଉუӦ୲‫ڦ‬०Ս‫݆ݛ‬Ljံ֪ଉඇࠀ୲ၚᆌ
fpLj඗ࢫምऺ໙Să৑࠶‫ܠܔ‬ຕᆌᆩዐ‫ܠڦ‬ຕ‫ٷݣ‬ഗઠຫLj
ኄዖ֪๬݆‫ۼ‬੗ᅜׂิ੗ᆩ‫ڦ‬঳ࡕLj‫ڪڍ‬๕1໯๖࠲ဣժ
փ๢ᆩᇀ໯ᆶ൧઄ă๯ံLjუӦ୲๟๼‫ۉ؜‬უ‫ݥڦ‬၍Ⴀࡧ
ຕLjܸ‫ڪ‬๕1֪ଉ‫ڦ‬ৈ๟ଭ‫ޚ‬༬๼‫ڦူ؜‬უӦ୲ăሞ‫ܠ‬ຕ
ᆌᆩዐLjኄዖܾ঩ၳᆌཚ‫׉‬੗ᅜࢮ୼փऺă඗ܸLj‫ܔ‬ᇀగ
ၵ‫ٷݣ‬ഗܸჾLjᆮഄ๟੺໏ၚᆌૌ‫ٷݣ‬ഗLjუӦ୲੗ీߛ
ᇀएᇀfp‫ڦ‬ᇨ֪ኵăኄૌ൧઄ူLjfp๴‫ڟ‬უӦ୲ኮྔ‫ڦ‬ᅺ໎
‫ڦ‬၌዆Lj૩සᅺ‫ߛٷ‬ೕဃֶ‫ۉ‬უኝୁ‫ڞ‬ዂ‫ڦ‬኱ୁ฿ۙဃ
ֶă
֪ଉუӦ୲‫ڦ‬ᅃዖ߸኱থ‫݆ݛڦ‬๟Ljၠ཮6ई཮7ዐ‫ڦ‬๼෇
‫܋‬ጀ෇‫گ‬ೕ‫ݛ‬հ)ሀ100Hz*)ኄዖ‫ݛ‬հࣷሞ๼‫ڞ܋؜‬ዂඇ‫ۉ‬
უӦ‫)ޗ‬Lj඗ࢫ࠵֪๖հഗฉٗ10%዁90%‫ڦ‬ฉื้क़(९཮
9)ăՂႷ๑ᆩၭ‫ݒ‬ઍ‫ۉ‬ፆLjᅜՆ௨ሗො‫ۉ‬ඹ‫ڞ‬ዂუӦ୲ܱ
ࣅă
ሞᆌᆩሏ໙‫ٷݣ‬ഗ้Lj൩ऻዿLjฉื้क़‫ٷݣࡗג‬ഗუӦ
୲‫ڦ‬ዘް๼෇հႚॽሞ൱ࢅ‫ۉิׂۅ‬უॖ‫ރ‬ăኄၵॖ‫ރ‬ཚ
‫׉‬ਏᆶ‫׬ܔݥ‬ႠLjܸ൐ᅃӯཚࡗ‫ٷݣ‬ഗ๼෇‫ۉ‬ୟ৊ႜ‫ܔݥ‬
‫׬‬ቘհLjኄଇዖၳᆌኮᅃईኁଇዖၳᆌཞ้ॽሞ๼‫ڞ܋؜‬
ዂ኱ୁ฿ۙă
ࡗሜ࣬ް
ࡗሜ࣬ްTኸ๼‫ۉ؜‬უٗԏࢅጒༀ࣬ް‫ۨܮڟ‬๼‫ۉ؜‬უEo้
໯Ⴔᄲ‫้ڦ‬क़ăሞԨ֪๬ዐLjᇑ཮6ई཮7໯๖‫ۉ‬ୟ๑ᆩ‫ڦ‬
๟ᅃ߲๼෇‫ݛ‬հLjഄ‫ۉ‬უঢ়ۙኝLjԲ‫ٷݣ‬ഗ๼‫܋؜‬ԏࢅ໯
Ⴔ‫ۉ‬უ‫ٷ‬50%ă‫ݛ‬հೕ୲ᆌۙኝ዁100HzፑᆸLj๼෇๼‫؜‬႑
ࡽᆌሞມጷ๖հഗฉ৊ႜԲডLjස཮9໯๖ă
ሞᅃၵ‫ٷݣ‬ഗዐLj‫ړ‬๼෇‫ۉ‬ୟዐ٪ሞ‫ٷ‬ፆੇ(‫ٷ‬ᇀ50KΩLj
཮6ዐ‫ڦ‬൱ࢅፆੇई཮7ዐ‫ڦ‬ᇸ๼෇)้Ljࡗሜ࣬ްॽሺेă
ᅙ݀ք‫֖߭ࡀڦ‬ຕ๢ᆩᇀ‫گ‬ፆੇLjഄമ्༵ย๟Ljࡗሜ࣬
ްփࣷᅺ‫ݒ‬ઍྪஏዐ‫ڦ‬ሗො‫ۉ‬ඹܸܱࣅă
ኟ‫׉‬൧઄ူLjࡗሜ࣬ް้क़ሀ‫׼‬Ⴤ1ࡹ௱ăሞ‫ݒ‬၎ದዃ
ዐLj੗ሺेྔևഭ࿋‫ۉ‬ୟઠ߀฀ࡗሜ࣬ްLjස཮10໯๖ă
޿‫ۉ‬ୟ੗‫ݞ‬ኹ๼‫؜‬ԏࢅLjܸٗՆ௨ࡗሜ࣬ް‫ڞ‬ዂჽ‫׿‬ăኟ
‫߾׉‬ፕ‫ྸڦ‬ᅃ၌዆๟Lj๼෇‫(ୁۉ‬ei/Ri)Ⴗ‫ٷ‬ዂ‫گ‬ᇀ‫ۨܮ‬๼
‫ୁۉ؜‬Ioᇑ޶ሜ‫ୁۉ‬ኮֶăഭ࿋‫ۉ‬ୟփీದࢇཞ၎ࢅֶ‫ݴ‬
ದዃ๑ᆩă
཮8. ֪ଉඇࠀ୲ၚᆌ
ሏ໙‫ٷݣ‬ഗ 13-6
཮9. ࡗሜ࣬ްࢅუӦ୲๖ᅪ཮
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ᆌᆩԴऻ
‫؛‬๔฿ۙ‫ۉ‬უ
฿ۙ‫ۉ‬უeosኸඪᅪ࿒‫܈‬Ă‫ۉ‬ᇸ‫ۉ‬უࢅ้क़ူLj๼෇‫ྺ܋‬๑
๼‫ࡃ܋؜‬ଭܸႴᄲଭᇸፆੇ༵ࠃ‫ۉڦ‬უ)९཮1*ă‫؛‬๔฿ۙ
‫ۉ‬უEosኸ25°Cत‫ۉۨܮ‬ᇸ‫ۉ‬უူ‫ڦ‬฿ۙ‫ۉ‬უăሞ‫ܠ‬ຕ‫ٷݣ‬
ഗዐLj‫ࠃ༵ۼ‬କᅃۨऐ዆Ljᆩᅜཚࡗྔևۙኝ‫ۉ‬࿋ऺॽ‫؛‬
๔฿ۙۙኝྺଭăᆶၵ‫ٷݣ‬ഗ֑ᆩాևۙኝ‫ݛ‬๕LjᅜՍԍ
ኤ‫؛‬๔฿ۙ)ཚ‫ྺ׉‬±1mV*‫ڟڥ‬ᅃۨଉ‫ڦ‬ፌ‫ٷ‬၌዆Lj࣑ჾ
ኮLjሞగၵᆌᆩዐLjྔևۙኝ‫ۉ‬࿋ऺ੗ᅜၩ‫أ‬փᆩăᆌਜ਼
ࢽ༬๺ᄲ൱LjADIࠅິ༵ࠃ‫ڦ‬ඪࢆ‫ٷݣ‬ഗ਩੗ాևۙኝ዁
±1mV‫؛‬๔฿ۙई߸‫گ‬ă‫؛‬๔฿ۙ੗ཚࡗ཮11໯๖‫ۉ‬ୟ৊
ႜ֪ଉLjഄዐLj૧ᆩ၎ᆌ‫ۉۨࠦڦ‬ፆൽ‫پ‬କྔևۙኝ‫ۉ‬࿋
ऺăሞᆌᆩ‫ۉ‬ᇸ‫ۉ‬უࢫLj฿ۙ‫ۉ‬უ٪ሞᇨඤ೏ᅎLjᅺُLj
ॺᅱඟ‫ٷݣ‬ഗ࿘ۨ዁ณ15‫ݴ‬ዓࢫ֍৊ႜ֪ଉă
཮10. ±10 Vྔևഭ࿋‫ۉ‬ୟ
‫؛‬๔ೋዃ‫ୁۉ‬
ೋዃ‫ ୁۉ‬ib ኸඪᅪ࿒‫܈‬Ă‫ۉ‬ᇸ‫ۉ‬უࢅ้क़ူLj्ยଭࠌఇ
‫ۉ‬უ‫ڦ‬൧઄ူLj๼෇‫ྺ܋‬๑๼‫ࡃ܋؜‬ଭܸႴᄲ࿮၌ᇸፆੇ
༵ࠃ‫ୁۉڦ‬ă‫ܔ‬ᇀֶ‫ٷݣݴ‬ഗLj޶๼෇‫ڦ܋‬ೋዃ‫ୁۉ‬՗๖
ྺib-Ljኟ๼෇‫܋‬՗๖ྺib+ă‫ܔ‬ᇀ‫ٷݣ܋ڇ‬ഗLjᇑቘհ࿘ۨ
‫ڇ‬ᇮᅃᄣLjೋዃ‫ୁۉ‬ৈኸ޶๼෇‫ୁۉڦ܋‬ă
‫؛‬๔ೋዃ‫ ୁۉ‬I b ኸሞ25°CĂ‫ۉۨܮ‬ᇸ‫ۉ‬უࢅଭࠌఇ‫ۉ‬უ
ူLjሞඪᅃ๼෇‫ڦڥ֪܋‬ೋዃ‫ୁۉ‬ă՗‫ٳ‬๕(0,+ )ई(0, -)՗
๖Lj࿄๑ᆩాևց‫׋‬ઠই‫؛گ‬๔ೋዃ‫ୁۉ‬LjनटႠ๔ዕ๟
ᅙኪ‫ڦ‬ăኟ޶ࡽ՗๖ྺ๑‫؛‬๔ೋዃ‫ࡃୁۉ‬ଭLjܸႴᄲॽྔ
ևց‫ۉ׋‬ፆ૶থ዁న߲‫ۉ‬ᇸ‫ۉ‬უă՗‫ٳ‬๕(±)՗௽Ljᅙཚࡗ
ాևց‫׋‬ऐ዆ઠ३ณ‫؛‬๔ೋዃ‫ୁۉ‬Lj൐֘ାೋዃ‫ୁۉ‬੗ీ
๟ඪᅃटႠăᅃӯ‫ں‬Ljց‫؛׋‬๔ೋዃ‫ܔୁۉ‬ೋዃ‫ୁۉ‬࿒‫܈‬
ဣຕबࢭփׂิᆖၚă࿢்૧ᆩ཮11໯๖‫ۉ‬ୟઠ֪ଉ‫؛‬๔
ೋዃ‫ୁۉ‬ă
‫؛‬๔ֶ‫ୁۉݴ‬
ߵ਍ۨᅭLjֶ‫ *ୁۉݴ‬id՗๖ሞଭࠌఇ‫ۉ‬უူLj߳๼෇‫ྺ܋‬
๑๼‫ࡃ܋؜‬ଭܸႴᄲ࿮၌ᇸ༵ࠃ‫ڦ‬ೋዃ‫ୁۉ‬ኮֶăֶ‫ݣݴ‬
‫ٷ‬ഗ‫ڦ‬๼෇‫ۉ‬ୟᅃӯ‫׬ܔװ‬ႠLjᅺܸLj߳๼෇‫ڦ܋‬ೋዃ‫ۉ‬
ୁൡၠᇀ၎‫ڪ‬Lj൐ൡၠᇀໜ࿒‫ۉࢅ܈‬ᇸ‫ۉ‬უܸՎࣅăཚ‫׉‬
൧઄ူLjැ࿄‫؛ܔ‬๔ೋዃ‫ୁۉ‬৊ႜց‫׋‬Ljֶ‫ୁۉݴ‬Բඪᅃ
๼෇‫ڦ܋‬ೋዃ‫گୁۉ‬3዁5Ԡăසࡕ߳๼෇ᆅগ‫ڟ‬থ‫ں‬ᆅগ
‫ڦ‬ፆੇ၎ೝ࢚Ljሶ฿ۙࢅ೏ᅎဃֶᇑֶ‫ݥܸୁۉݴ‬ೋዃ‫ۉ‬
ୁ‫ׯ‬Բ૩ăሞ‫ܠ‬ຕᆌᆩዐLjසࡕ߳๼෇‫ྔڦ܋‬ևፆੇ၎ೝ
࢚Ljሶሞ‫؛‬๔ೋዃ‫֑ୁۉ‬ᆩాևց‫׋‬ऐ዆‫ڦ‬൧઄ူLj๑ᆩ
‫ٷݣ‬ഗժ࿮௽၂ᆫ๞੗ჾă‫؛‬๔ֶ‫ୁۉݴ‬IdLjनሞ25°Cत
‫ۉۨܮ‬ᇸ‫ۉ‬უူ֪‫ୁۉݴֶڦڥ‬Lj੗ཚࡗ཮11໯๖‫ۉ‬ୟ৊
ႜ֪ଉă
࿒‫܈‬೏ᅎ
฿ۙ‫ۉ‬უĂೋዃ‫ࣷۼୁۉݴֶࢅୁۉ‬ໜ࿒‫ܸ܈‬Վࣅईٗഄ‫؛‬
๔ኵ“೏ᅎ”ă‫ڟ‬ణമྺኹLjኄ๟‫ܠ‬ຕᆌᆩዐፌዘᄲ‫ڦ‬ဃֶ
ᇸăኄၵ֖ຕ‫ڦ‬࿒‫܈‬ဣຕLjनΔeos/ΔTĂΔib/ΔTࢅΔid/ΔT਩ۨᅭ
ྺሞኸۨ࿒‫ڦాྷݔ܈‬ೝ਩ၽ୲Ljཚࡗ३ඁ࿒‫ڦۅ܋ྷݔ܈‬
฿ۙኵLjም‫أ‬ᅜ࿒‫܈‬Վࣅ‫؜ڥ‬ăᅃӯܸჾLj೏ᅎ๟࿒‫ڦ܈‬ᅃ
ዖ‫ݥ‬၍ႠࡧຕLjट‫܋‬࿒‫ڦူ܈‬ၽ୲Բኟ‫׉‬๪࿒ူ‫ٷ‬ă࿒‫܈‬೏
ᅎဣຕཚࡗ཮11໯๖‫ۉ‬ୟ֪ଉă‫ٷݣ‬ഗᆩઠืუഄጲว‫گڦ‬
‫ۉ‬ೝ๼෇฿ۙ႑ࡽLj๑ഄሞ๼‫ڟٳ܋؜‬Սᇀ֪ଉ‫ۉڦ‬უ຤
ೝăሺᅮᆯԲ୲Rf/RiඓۨăՂႷ჋ስ‫֑ୁۉ‬ᄣ‫ۉ‬ፆRsLjᅜ๑‫ۉ‬
უ೏ᅎၭᇀֶ‫ୁۉݴ‬ᆅഐ‫ڦ‬೏ᅎLjनRs × Δid/ΔT> > Δeos/ΔTă
ईኁLjՂႷٗ‫ୁۉ‬೏ᅎຕ਍ዐ३ඁ‫ۉ‬უ೏ᅎă
๑ᆩ݀ք‫ۉڦ‬უ೏ᅎ֖ຕ‫ڦ‬ᅃ߲࿚༶ሞᇀLjኄዖຕ਍ৈ๢ᆩ
ᇀৢༀ࿒‫܈‬ཉॲLjഄዐLj्ۨఇ੷‫ڦ‬࿒‫܈‬๟਩ሌ‫ڦ‬ă‫ܠ‬ຕֶ
‫ٷݣݴ‬ഗ‫ڦ‬฿ۙ‫ۉ‬უ‫ܔ‬ඤ༱‫܈‬ๆ‫ߌ௺ݴ‬Ljᅺྺ೏ᅎႠీൽਦ
ᇀ߳๼෇ֶ‫ڦܔݴ‬ৗ༹࠶ీ‫ޏ‬ၩ‫أ‬ഄዐ‫ڦ‬ড‫ٷ‬฿ۙăᅺُLj
ሞ٪ሞඤ༱‫ৣ࣍ڦ܈‬ዐLj฿ۙ‫ۉ‬უ੗ీ‫ࡗג‬एᇀ೏ᅎဣຕ‫ڦ‬
ᇨ֪ኵăኄዖ൧઄ူLjሞড቏࿒‫ాྷݔ܈‬ൽ‫گڥ‬೏ᅎ๟‫׉ݥ‬
࠲॰‫ڦ‬LjᅺُLjॺᅱ‫ٷݣܔ‬ഗ৊ႜ߰૗ईೡԸ‫ت‬૙Ljᅜඓԍ
࿒‫ڦ܈‬਩ሌႠăೋዃ‫ୁۉ‬փࣷ๴‫ڟ‬ඤ༱‫ڦୁۉݴֶࢅ܈‬၂ዸ
ᆖၚLjन๑๴‫ڟ‬ᆖၚ้Ljഄ‫܈ߌ௺ܔ‬ᄺփස฿ۙ‫ۉ‬უă
‫ܔ‬ᇀFETࢅՎඹܾट࠶‫ٷݣൃۉ‬ഗLj࿒‫܈‬௅ืߛ10°CLjഄೋዃ
‫ߛ༵ॽୁۉݴֶࢅୁۉ‬ᅃԠLjᅺُLjැ‫ݥ‬๟ড቏‫߾ڦ‬ፕ࿒‫܈‬
‫ྷݔ‬Lj၍Ⴀࣅ೏ᅎဣຕᅪᅭփ‫ٷ‬ă
*ᅜമ‫ྺ׬‬฿ۙ‫ୁۉ‬ă
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ُ้एट݀พट‫ۉ‬უ઻ࣅ‫ྺׯ‬ਦۨႠᅺ໎ă‫ܔ‬ᇀূຌԋఈ
‫ۉ‬ፆLjৗ༹࠶‫ٷݣ‬ഗ‫ڦ‬฿ۙ‫ۉ‬უሀྺ100μV/౎LjܸFET‫ݣ‬
‫ٷ‬ഗ‫ٷ୼܈ײࣅ઻ڦ‬ᇀُኵă
ሞ֑ᆩాև‫؛‬๔‫ୁۉ‬ց‫׋‬ऐ዆‫ڦ‬൧઄ူLjֶ‫ݴ‬๼෇‫ٷݣ‬ഗ
‫׊ڦ‬೺ೋዃ‫ୁۉ‬࿘ۨႠཞᄣൽਦᇀ‫ۉ‬ፆ࿘ۨႠăኄዖ൧઄
ူLjཚࡗຕቹ౹‫ڦ‬༐໎‫ۉ‬ፆ(ᅺྺ๨‫ׇ‬ฉுᆶ‫ٷ‬ኵূຌԋఈ
‫ۉ‬ፆ)༵ࠃሀ90%‫ڦ‬एटೋዃ‫ୁۉ‬ăසࡕُૌ‫ۉ‬ፆՎࣅ1%Lj
ሶ‫؛ۨܮ‬๔ೋዃ‫ॽୁۉ‬Վࣅ9%ፑᆸLjኄᅃ‫܈ޗ‬੗ీਏᆶ၂
ዸᅪᅭăᅺُLj࿢்੗ᅜ‫؜ڥ‬ᅜူ঳ஃLj࿮ాև‫؛‬๔‫ୁۉ‬
ց‫׋‬ऐ዆‫ٷݣڦ‬ഗਏᆶ߸࿘ۨ‫ڦ‬ೋዃ‫ୁۉ‬ăሞኄၵཉॲ
ူLj‫׊‬೺ೋዃ‫ୁۉ‬࿘ۨႠዷᄲൽਦᇀৗ༹࠶ईFETഗॲ‫ڦ‬
࿘ۨႠLj޿ኵ੗ీࡻᇀ1%ă
๼෇ፆੇ
ֶ‫ݴ‬๼෇ፆੇRdኸଇ߲๼෇‫܋‬क़ሞ25°C้֪‫ڦڥ‬ፆੇLjഄ
മ्༵ย๟ဃֶ‫ۉ‬უeεྺଭईटৎ0 V(९཮1)ă‫ܔ‬ᇀ‫ݣ܋ڇ‬
‫ٷ‬ഗLjRdྺ๼෇ፆੇLjᅺྺኟ๼෇‫܋‬থ‫ں‬ăৎຼ‫ں‬Lj‫ۯ‬ༀ
ፆੇ੗ཚࡗᇑRdժ૴‫ۉڦ‬ඹCd՗๖ă
཮11. ฿ۙ‫ۉ‬უĂೋዃ‫֪ڦୁۉݴֶࢅୁۉ‬๬‫ۉ‬ୟ
‫ۉ‬ᇸ‫ۉ‬უଳ௺‫܈‬
฿ۙ‫ۉ‬უĂೋዃ‫ୁۉݴֶࢅୁۉ‬ཞᄣࣷໜ‫ۉ‬ᇸ‫ۉ‬უܸՎ
ࣅăཚ‫׉‬Ljᇑ࿒‫܈‬೏ᅎ၎ԲLjኄዖၳᆌ‫ڞ‬ዂ‫ڦ‬ဃֶ੗ᅜࢮ
୼ăৢༀई኱ୁ‫ۉ‬ᇸ‫ۉ‬უဣຕΔeos/ΔVsĂΔib/ΔVsĂΔid/ΔVs
ཚࡗ཮11໯๖‫ۉ‬ୟ֪ଉLjഄ‫݆ݛ‬๟ॽ‫ۉ‬ᇸ‫ۉ‬უ‫ݴ‬՚߀Վ
±1 Vă
ᅃዖ‫׉‬९ဃ঴๟Ljසࡕ‫ܔ‬ኟ޶‫ۉ‬უՎࣅ‫܈ޗ‬၎ཞ‫ۉڦ‬ᇸ৊
ႜ߶ጷLj੗ᅜ߀฀‫ۉ‬ᇸ‫ۉ‬უ᳘ࢇႠీăᅃӯܸჾLj߶ጷ‫ۉ‬
ᇸժ࿮ํाᆩ‫ت‬Ljᅺྺኟ‫ۉ‬ᇸ‫ۉ‬უဣຕཚ‫׉‬Բ޶‫ۉ‬ᇸ‫ۉ‬უ
ဣຕ‫ܠڥٷ‬ă‫ۉ‬ᇸฉ‫ڦ‬঍ୁሯำࢅ࿖հᅞ዆Ⴀీփසৢༀ
ई኱ୁᅞ዆Lj‫ܔڍ‬बࢭ໯ᆶ‫ٷݣ‬ഗܸჾLjሞড੻ೕ୲‫ྷݔ‬
ాLj঍ୁᅞ዆ॽࡻᇀ1mV/Vई60dBă
೏ᅎᇑ้क़
ໜጣഗॲ઻ࣅLj฿ۙ‫ۉ‬უĂೋዃ‫ࣷୁۉݴֶࢅୁۉ‬ໜ้क़
ܸՎࣅăᆯᇀ٪ሞփ੗Ն௨‫ڦ‬ჽ‫׿‬Lj໯ᅜవᇀइ‫׊ڥ‬೺‫ڦ‬
ৢༀຕ਍ă‫ڍ‬๟ྜඇ੗ᅜຫLj݀ք‫ٷݣڦ‬ഗ้क़೏ᅎ֖ຕ
փࣷ၍Ⴀેओă૩සLjቘհ࿘ۨ‫ٷݣ‬ഗ)๟ణമሞ‫׊‬೺࿘ۨ
Ⴀ‫ݛ‬௬՗၄ፌࡻ‫ٷݣڦ‬ഗૌ႙*‫ۉڦ‬უ೏ᅎཚ‫ྺ׉‬1μV/ཀLj
ܸሞᅃ౎ాLj30ཀ‫ેڦ‬ओ೏ᅎᅃӯփࣷ‫ࡗג‬5μVई15μVă
ֶ‫ݴ‬๼෇႙‫ٷݣ‬ഗ‫׊ڦ‬೺‫ۉ‬უ೏ᅎዷᄲൽਦᇀ๼෇ֶ‫ܔݴ‬
ዐण‫ۉ‬ट‫ۉ‬ፆ‫ࣅ઻ڦ‬ăችࢇ‫ڟ‬๼෇‫ࣅ઻ڦ܋‬ဣຕሀྺण‫ۉ‬
ट‫ۉ‬ፆՎࣅ‫ڦ‬300μV/%ă༐໎‫ۉ‬ፆሞᅃ౎ዐ࢔੗ీࣷ઻ࣅ
1%ई2%Lj঳ࡕ‫ڞ‬ዂ฿ۙ‫ۉ‬უՎࣅ300μV዁600μVăැॽূ
ຌԋఈ‫ۉ‬ፆᆩᇀण‫ۉ‬ट‫ۉ‬ፆሶ੗ट‫׊ߛ༵ںٷ‬೺࿘ۨႠLj
ሏ໙‫ٷݣ‬ഗ 13-8
ֶ‫ݴ‬๼෇ፆੇ๟֪ଉవ‫܈‬ፌ‫֖ڦٷ‬ຕኮᅃLj‫ܔ‬ᇀߛሺᅮĂ
ߛፆੇૌ‫ٷݣ‬ഗᆮഄසُăᅃӯ‫ں‬Ljኄዖ֪ଉኻీሞํᄓ
๪ཉॲူᆯঢ়ᄓ‫ײ߾ڦ޷ݿ‬฾৊ႜLjժႴ֑ᆩ༬๺ํᄓย
ԢLjᅜՆ௨ሯำᆖၚăᅺُLjԈઔADIሞా‫ܠڦ‬ຕࠅິ࢔
ณएᇀิׂ၍ઠ֪ଉ޿֖ຕă႞ሏ‫ڦ‬๟Lj࿢்ժփႴᄲቨ
࿥৛ඓ‫ڦ‬Rdኪ๎Ljᅺྺ‫ܔ‬ᇀ‫ܠ‬ຕ‫ۉ‬ୟܸჾLjኻᄲRd‫ٷ‬ᇀྔ
և‫ݒ‬ઍፆੇLjഄኵ‫ܔ‬Կ࣍Ⴀీժ࿮၂ዸᆖၚă
཮12ዐ‫ۉڦ‬ୟቛ๖କሞ၂ዸই‫گ‬ሯำ‫ڦ‬൧઄ူ֪ଉRd‫ڦ‬ᇱ
૙ăኄၵ‫ۉ‬ୟํा֪ଉ‫ڦ‬๟ᇑ޶๼෇ࠌఇፆੇժ૴‫ڦ‬Rd ă
඗ܸLjࠌఇፆੇཚ‫׉‬ԲRd‫ٷ‬10዁100ԠLjᅺُ঳ࡕ‫ڞ‬ዂ‫ڦ‬ဃ
ֶ੗ᅜࢮ୼փऺă
ࠌఇፆੇRcmኸ߳๼෇‫܋‬ᇑথ‫ں‬ईࠌᆩ‫ۉ‬ᇸक़‫ڦ‬ፆੇLj‫ܮ‬
ۨ࿒‫ྺ܈‬25°C(९཮1)ă‫ܔ‬ᇀ‫ܠ‬ຕ‫ۉ‬ୟLj‫ྺأ‬൱ࢅ‫ۅ‬ሺे‫ۉ‬
ඹᅜྔLj޶๼෇‫ࠌڦ܋‬ఇፆੇRcm-ժ࿮၂ዸᅪᅭă඗ܸLj
ኟ๼෇‫ࠌڦ܋‬ఇፆੇRcm+੗ยۨཞ၎ದዃዐԿ࣍๼෇ፆ
ੇ‫ڦ‬ฉ၌ă‫ۯ‬ༀፆੇ੗՗๖ྺᇑRcmժ૴‫ۉڦ‬ඹCcmLjRcmཚ
‫׉‬ሞኟ๼෇‫߾܋‬ፕᇀ5዁25 pfኮक़ă
཮13໯๖‫ୁۉ‬੗ᆩᇀ֪ଉፌߛ‫ٳ‬500MΩፑᆸ‫ڦ‬R cm+ă๑
ᆩ‫ྺྷݔ‬1዁5 Hz‫ڦ‬ና‫ږ‬ഗೕ୲LjժۙኝRsLj๑๼‫܋؜‬ই‫گ‬
10%ăሶᆶRcm+=9Rsăፆੇ‫ُࡗג‬ኵ้LjॺᅱᆩPAप‫ୁۉ‬
֪ଉᅏൽ‫ۉپ‬ፆRsLjժॽ኱ୁೋዃ‫ୁۉ‬ፕྺࠌఇ‫ۉ‬უ‫ࡧڦ‬
ຕ৊ႜ֪ଉă
Rev. 0 | Page 6 of 8
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AN-356
ᆌᆩԴऻ
ࠌఇፆੇཞ้๟࿒‫ࠌࢅ܈‬ఇ‫ۉ‬უ‫ݥڦ‬၍Ⴀࡧຕă‫ܔ‬ᇀFET
‫ٷݣ‬ഗLj࿒‫܈‬௅ฉื10°CLjࠌఇፆੇই‫گ‬ଇԠă
ፕྺࠌఇ‫ۉ‬უ‫ࡧڦ‬ຕLjRcmۨᅭྺሞ0዁±Ecm)ፌ‫ࠌٷ‬ఇ‫ۉ‬
უ*क़Վࣅ‫ࠌڦ‬ఇ‫ۉ‬უ‫ڦ‬ೝ਩ፆੇă࠲ᇀగ߲‫ࠌٷ‬ఇ‫ۉ‬უ‫ڦ‬
ሺଉRcm੗ీᇺᇺၭᇀ‫ۨܮ‬ೝ਩ኵRcmLjᆮഄ๟FET๼෇‫ݣ‬
‫ٷ‬ഗă
๼෇‫܋‬क़ፌ‫ۉٷ‬უ
ሞ‫ܠ‬ຕ߾ፕཉॲူLj‫ݒ‬ઍ๑๼෇‫܋‬क़‫ڦ‬ဃֶ‫ۉ‬უeεԍ‫׼‬ሞ
থৎ0V‫ڦ‬຤ೝă඗ܸLjሞዮස‫ۉ‬უԲডഗईኁ๼෇‫ۉ‬უ‫ג‬
ࡗ๼‫܋؜‬ԏࢅ໯Ⴔ‫ۉ‬უኮૌ‫ڦ‬ᆌᆩዐLj๼෇‫ۉڦ܋‬უ੗ీ
ড‫ٷ‬ăEd՗๖ሞփ‫ڞ‬ዂ‫ٷݣ‬ഗᆦ৳Ⴀ໦࣋‫ڦ‬൧઄ူLj੗ᅜ
ሞ๼෇‫܋‬क़ᆌᆩ‫ڦ‬ፌ‫ۉٷ‬უăሞ๼෇‫ݣ܋‬ዃժ૴‫ڦ‬ԝ‫ܔ‬ԝ
ܾट࠶ྺԍࢺ‫ٷݣ‬ഗ‫ڦ‬ᅃዖ‫ݛ‬๕ă
ፌ‫ࠌٷ‬ఇ‫ۉ‬უ
‫ܔ‬ᇀֶ‫ݴ‬๼෇‫ٷݣ‬ഗLjଇ߲๼෇‫ۉڦ܋‬უ਩੗ื዁‫ۉں‬࿋
ᅜฉăࠌఇ‫ۉ‬უecm՗๖ሞଇ߲๼෇‫ۉ܋‬უ၎ཞ้Lj߳๼෇
‫ߛ܋‬ᇀ‫ۉں‬࿋‫ۉڦ‬უăEcmኸሞ๼‫؜܋؜‬၄ၥհ၄ၡईࡗ‫ٷ‬
‫ݥ‬၍Ⴀ‫܈‬ኮമLj๼෇‫ڦ܋‬ፌ‫ރٷ‬ኵࠌఇ‫ۉ‬უăEcmਦۨକ‫ۉ‬
უ߶ໜഗ૶থ‫ڦ‬ፌ‫ٷ‬๼෇‫ۉ‬უ)९཮7*ă
Ecmཚࡗ཮7໯๖‫ۉ‬ୟ৊ႜ֪ଉLjഄ‫݆ݛ‬๟༵ߛ‫ރ‬ኵ๼෇‫ۉ‬
უ)ኟ၀հ*Lj኱‫ڟ‬ሞ୳հഗฉ݀၄฿ኈ)ሀ1%዁3%*ྺኹă
๼෇႑ࡽೕ୲ՂႷᇺᇺ‫گ‬ᇀཞ၎๼෇‫ڦ܋‬ඇࠀ୲ၚᆌೕ୲
fpă
ࠌఇᅞ዆
૙ၙ‫ڦ‬ሏ໙‫ٷݣ‬ഗৈ‫ܔ‬๼෇‫܋‬ኮक़‫ۉݴֶڦ‬უ(e+lje-)ፕ
‫؜‬ၚᆌLj൐ሞࠌఇ‫ۉ‬უူ)नଇ߲๼෇‫ۉ܋‬࿋၎ཞ้*փׂ
ิ๼‫؜‬ă඗ܸLjᆯᇀኟ޶๼෇‫ڦ܋‬ሺᅮ୼ᆶֶᅴLjᅺܸփ
ࣷٗ๼‫ྜ܋؜‬ඇ३ඁࠌఇ๼෇‫ۉ‬უăසࡕ࿢்ॽ๼‫ࠌ؜‬ఇ
ဃֶ‫ۉ‬უችࢇ‫ڟ‬๼෇‫أ)܋‬ᅜሺᅮ*Ljժ‫׬‬ኮྺ๼෇ࠌఇဃ
ֶ‫ۉ‬უeεcmLjሶࠌఇᅞ዆(CMR)੗ۨᅭྺࠌఇ‫ۉ‬უᇑࠌఇ
ဃֶ‫ۉ‬უኮԲLjनCMR=ecm/eεcmăCMRᆶ้՗๖ྺdBLjन
ൽ20ԠԲኵ‫ܔ‬ຕ)एຕྺ10*ăሞ཮1‫ڪڦ‬ၳ‫ۉ‬ୟዐLjࠌఇᅞ
዆‫ڞ‬ዂ‫ڦ‬ဃֶ੗ཚࡗᇑ๼෇‫ۉڦ૴ز܋‬უ݀ิഗeε cm՗
๖ă൩ጀᅪLjඪᅃ๼෇‫܋‬থ‫้ں‬Ljࠌఇဃֶॽࡃଭăᅺ
ُLj‫ݒ‬၎ದዃփ٪ሞࠌఇဃֶLjᅺྺഄኟ๼෇‫܋‬থ‫ں‬ă੗
९LjCMRኻࣷߴཞ၎ࢅֶ‫ݴ‬ದዃ‫ټ‬ઠ࿚༶Ljኄଇዖ൧઄
ူLjࠌఇ‫ۉ‬უ‫ڦ‬Վࣅᇑ๼෇႑ࡽਏᆶ኱থ‫ڦ‬Բ૩࠲ဣăُ
้Ljeεcm๟ᅃዖएԨ‫֪ڦ‬ଉဃֶLjࣷᆖၚ‫ڟ‬ኝ߲‫ۉ‬ୟ‫ڦ‬৛
‫܈‬ă
૩සLjසࡕၠ཮14໯๖‫ۉ‬ୟ‫ڦ‬๼෇‫܋‬ጀ෇10 V႑ࡽ eILjሶ
ࠌఇ‫ۉ‬უecm‫ڪ‬ᇀ๼෇‫ۉ‬უeiă‫ܔ‬ᇀ5,000ई74dB CMR‫ݣڦ‬
‫ٷ‬ഗઠຫLjኄࣷ‫ڞ‬ዂ2mV‫ࠌڦ‬ఇ‫ۉ‬უeεcmLjन0.02%‫֪ڦ‬ଉ
ဃֶă
ยۨeILjሞ1዁5 Hz‫ాྷݔ‬Ljे‫ٷ‬RSLj
኱‫ڟ‬ਸഔSILjॽe4༵ߛ2ԠăሶᆶLjRS=Rd
ೝ࢚኱ୁ๼‫ॽ؜‬fJই዁ፌၭ‫ۉ‬უࢅೕ୲ኵ
཮12. ֶ‫ݴ‬ፆੇ֪๬‫ۉ‬ୟ
཮13. ࠌఇፆੇ֪๬‫ۉ‬ୟ
཮14. ࠌఇ‫ۉ‬უ๖ᅪ཮
Rev. 0 | Page 7 of 8
཮15. ࠌఇဃֶᇑࠌఇ‫ۉ‬უ
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ሏ໙‫ٷݣ‬ഗ 13-9
AN-356
ᆌᆩԴऻ
ᆯᇀࠌఇ‫ۉ‬უဃֶeεcm੗ీ๟ࠌఇ‫ۉ‬უ‫ݥߛڦ‬၍ႠࡧຕLj
ժࣷໜ࿒‫ܸ܈‬ՎࣅLj৊ᅃօሺेକ৛ඓ֪ۨCMR‫ڦ‬వ‫܈‬ă
FET๼෇‫ٷݣ‬ഗᆮഄසُăස཮15໯๖LjADIࠅິ݀ք‫ڦ‬
CMR֖ຕྺೝ਩ኵLj्ۨሞፌ‫ࠌٷ‬ఇ‫ۉ‬უ(±Ecm)ူ֪‫ڦڥ‬
‫ۅ܋‬ኵă‫ڍ‬గၵড‫ࠌٷ‬ఇ‫ۉ‬უ‫ڦ‬ሺଉCMR੗ీ‫گ‬ᇀ‫ڦۨܮ‬
ೝ਩CMRኵă๚ํฉLjසࡕࠌఇဃֶྺࠌఇ‫ۉ‬უ‫ڦ‬၍Ⴀࡧ
ຕLj൐CMRփ๴࿒‫ڦ܈‬၂ዸᆖၚLjሶ޿ဃֶᇸփࣷᆅഐჹ
ዘࢫࡕăഄᇱᅺሞᇀLj၍ႠCMRဃֶ੗๫ྺሺᅮဃֶLj੗
ཚࡗۙኝԿ࣍ሺᅮઠց‫׋‬ăᅺُLjሞႹ‫ܠ‬ᆌᆩዐLjࠌఇဃ
ֶeεcmᇑࠌఇ‫ۉ‬უ‫ڦ‬၍Ⴀ‫܈‬ཚ‫׉‬ԲCMRԨว߸ዘᄲă
཮16ዐ‫ۉڦ‬ୟ༵ࠃକ֪ଉCMRᅜतࠌఇဃֶ‫ݥ‬၍Ⴀ‫ڦ܈‬ᅃ
ዖ‫܀‬༬‫݆ݛ‬ă๖հഗೡటॽዘް཮15ዐ‫཮ڦ‬ႚă‫ۉۯޝ‬ᇸ
ሎႹ๑ᆩ‫܋ڇ‬๖հഗLjܸ൐बࢭඪࢆ࿘უ‫ۉ‬ᇸ‫ۼ‬ᆛᆶ‫ۯޝ‬
๼‫؜‬ժᆶ؊‫߰ڦݴ‬૗ă݀ք‫ڦ‬CMRࡀ֖߭ຕৈ๢ᆩᇀ኱ୁ
๼෇႑ࡽLjᅺُLj޿֖ຕᆌएᇀ5Hzई߸‫ڦگ‬႑ࡽೕ୲৊
ႜ֪ଉăডߛೕ୲ူ‫ڦ‬CMR(໚඗ࡀ֖߭ຕዐժ࿄༵ࠃԍ
ኤ)ᄺ੗ཚࡗ޿‫ۉ‬ୟ৊ႜ֪ଉă࿢்৊ᅃօ्ยLj֪๬‫ۉ‬ୟ
तᆌᆩ‫ྔڦ‬և‫ۉ‬ୟፆੇ਩ၭᇀࠌఇፆੇLjᅜՆ௨ፆੇ฿࢚
ሰ‫ࠌڦྔܮׯ‬ఇဃֶă
ႜഄ‫ڢ‬Ljᅪनߵዜ೺ሯำᇑೕ୲‫ݒׯ‬Բ࠲ဣăሞዐೕူLj
ߵዜ೺ሯำԍ‫׼‬փՎईྺ“ӣሯำ”
ྺ֪ଉሯำLjሞ཮11໯๖‫ۉ‬ୟ‫ڦ‬๼‫܋؜‬ሺेକᅃ߲෍ࣅপ
ೕཚ‫୳ټ‬հഗăଷྔLjՂႷۙኝፆੇĂሺᅮࢅ‫ۉ‬ඹLjᅜඓ
ԍ‫ٷݣ‬ഗࢅྔև‫ݒ‬ઍፇॲ਩փ၌዆֪ଉ‫ڦ‬ሯำ‫੻ټ‬ă‫ܔ‬ᇀ
ट‫ୁۉگ‬ሯำLj੻‫֪ټ‬ଉవ‫܈‬ट‫ٷ‬Ljᅺྺሗො‫ۉ‬ඹᇑ༵ื
ଳ௺‫֑ٷڦ܈‬ᄣ‫ۉ‬ፆኵኮक़٪ሞ঍ࢻፕᆩă
ᅃӯᄲ৊ႜଇْሯำ֪ଉăཚࡗ‫ټ‬ጒऻ୤ഗ֪ଉ0.01዁1Hz
‫ټ‬ཚዐ‫گڦ‬ೕሯำLjժՔۨྺփඓۨႠྺ3σ‫ރރڦ‬ኵLjᅪ
न ࠵ ֪ ‫ ރ ރ‬ಇ ‫ أ‬ኵ ዐ ‫ ڦ‬99%࿋ ᇀ ኸ ۨ ၌ ‫ ܈‬ᅜ ా ă ཚ ࡗ
VTVM)ፌࡻྺኈኟ‫ڦ‬਩‫ߵݛ‬႙ࡽ*֪ଉ5Hz዁50kHz‫ټ‬ཚዐ
‫ټ੻ڦ‬ሯำLjժՔۨྺ਩‫ߵݛ‬ኵă‫ړ‬඗LjྺକՆ௨‫ۉ‬ᇸ၍
ୟೕ୲ࢅ࿮၍‫ۉ‬ೕ୲‫ڦ‬ᆖၚLjሞኄૌ֪ଉዐՂႷ֑ൽೡԸ
‫ٯ‬แLjኄᅃ‫ۅ‬዁࠲ዘᄲă
๼෇ሯำ
૙ஃฉLj৽ၟ฿ۙ‫ۉ‬უࢅೋዃ‫ୁۉ‬ᅃᄣLj๼෇‫ۉ‬უࢅ‫ୁۉ‬
ሯำ༬Ⴀ๟੗ᅜ֪ଉĂՔۨࢅ‫ݴ‬ဆ‫ڦ‬ă๚ํฉLj฿ۙ‫ۉ‬უ
ࢅೋዃ‫ୁۉ‬೏ᅎ੗๫ྺ݀ิᇀट‫گ‬ೕ୲ူ‫ڦ‬ሯำăྺُLj
ሞ཮1໯๖‫ڪ‬ၳ‫ۉ‬ୟᅜत཮11֪๬‫ۉ‬ୟዐLjᆩ‫ڪ‬ၳ‫ۉ‬უሯ
ำ݀ิഗen‫༺پ‬eosLjॽᆩ‫ڪ‬ၳ‫ୁۉ‬ሯำ݀ิഗiN-ࢅiN+ൽ‫پ‬
ib-ࢅib+ăᇑ኱ୁ೏ᅎ၎ԲLj֪ଉࢅՔۨሯำ‫ڦ‬ዷᄲֶᅴሞ
ᇀՂႷ੊୯‫੻ټ‬ᅺ໎ă‫گ‬ೕူ(100Hzईᅜူ)Lj1/f ሯำ‫ٷ‬
ሏ໙‫ٷݣ‬ഗ 13-10
Rev. 0 | Page 8 of 8
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