科学网-差分放大器放大倍数问题(续)
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瀛﹁€呯敵鐟炴澃 鍙戣〃浜? 2010-4-30 22:56:49
鍒嗙被锛氱鐮旂瑪璁扳攤锛? 鈹? 娴忚锛?59       鎺ㄨ崘缁欐湅鍙?/span>  鍙傝禌鍗氭枃 (娴忚锛?32  璇勮锛? )

鐢变簬鐗堥潰鏈夐檺锛屾墍浠ュ彧鍒楀嚭涓昏鐨勪竴浜涙暟鎹€傚浜庣浉鍚岀殑杈撳叆鐢靛帇锛屽叾宸垎鐢靛帇鐩哥瓑锛屽叡妯$數鍘嬩笉绛夛紙濡備笂琛級锛屾帴鍦颁笌涓嶆帴鍦颁娇寰?span lang="EN-US">V1鍊煎彂鐢熷彉鍖栵紝杩涜€屼娇V1+Uc鐨勫€兼湁寰堝ぇ鍙樺寲锛岀敱鎺ㄥ鎵€寰楃殑浼犻€掑嚱鏁板彲浠ョ湅鍑猴紝V1+Uc瓒婂ぇ瀵硅緭鍑哄奖鍝嶈秺澶э紝涓嶆帴鍦扮殑鎯呭喌鍐呭浜庝笉鍚岀殑杈撳叆鐢靛帇涔熸湁寰皬鍙樺寲銆備粠涓婅〃鏁版嵁鍙互鐪嬪嚭涓嶆帴鍦扮殑鎯呭喌鏇存帴杩戞斁澶у櫒鐨勭湡瀹炴斁澶у€嶆暟銆?span lang="EN-US">

閫氳繃鏈浠跨湡鍙互寰楀嚭锛屽樊鍒嗘斁澶у櫒澶栧洿鐢甸樆鍖归厤瀵?span lang="EN-US">CMR鎬ц兘褰卞搷寰堝ぇ锛岄€夌數闃绘椂鏈€濂借繘琛屾墜宸ュ尮閰嶃€?/span>

浠婂ぉ瀵圭數闃诲尮閰嶇粰鍏辨ā鎶戝埗鎬ц兘甯︽潵鐨勫奖鍝嶈繘琛屼簡浠跨湡銆傞鍏堜慨鏀逛簡鐢甸樆鍊硷紝濡傚浘锛?/v:shapetype>

sRc=http://www.sciencenet.cn/upload/blog/images/2010/4/2010430225621841.jpg


浠跨湡鏁版嵁锛?/p>

 

杈撳嚭绔數鍘?/font>

Vo

杈撳叆绔數鍘嬶紙V2-V1锛?/span>

鏀惧ぇ鍊嶆暟

Vo/(V2-V1)

骞冲潎鏀惧ぇ鍊嶆暟

涓嶆护娉?/span>(涓嶆帴鍦?/span>)

1.770

3.497

0.506148

0.506109

2.997

1.517

0.506173

2.498

1.264

0.506005

涓嶆护娉?/span>(鎺ュ湴)

1.766

3.502

0.504283

0.504204

1.514

3.002

0.50433

1.261

2.502

0.503997

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瀵硅緭鍏ョ(7,21)鍜岃緭鍑虹(2)杩涜浜?span lang="EN-US">DC Operating Point Analysis锛屽叾缁撴灉绮惧害寰堥珮锛屽緱鍒颁竴缁勫湪鎺ュ湴鍜屼笉鎺ュ湴涓ょ鎯呭喌涓嬬殑涓€缁勬暟鎹紝浠庝腑鍒嗘瀽浜嗘帴鍦颁笌涓嶆帴鍦板甫鏉ョ殑褰卞搷銆傝繖鏃堕噰鐢ㄧ殑鏄洿鎺ヨ緭鍏ョ殑鏂瑰紡锛屽嵆R1鍜?span lang="EN-US">R3绔洿鎺ユ帴鐢垫簮锛岀劧鍚庤缃?span lang="EN-US">R1绔槸鍚︽帴鍦帮紝鍏跺甫鏉ョ殑褰卞搷鏄竴鏍风殑銆傚嵆褰撹繖涓€绔帴鍦版椂锛屽鏋滅數闃讳笉鍖归厤锛屽叡妯$數鍘嬪皢浜х敓杈冨ぇ鐨勫奖鍝嶏紝鍏辨ā鐢靛帇瓒婂ぇ锛屽奖鍝嶈秺澶с€?/span>

瀵逛紶閫掑嚱鏁拌繘琛屼簡鎺ㄥ锛屽緱鍒帮細sRc=http://www.sciencenet.cn/upload/blog/images/2010/5/20105194359268.jpg 锛?/span>鎵€浠ュ綋鐢甸樆涓嶅尮閰嶆椂U1鍜?span lang="EN-US">Uc涔嬪拰浼氬杈撳嚭浜х敓褰卞搷銆備豢鐪熺粨鏋滀笌涔嬪惢鍚堛€?/span>

浠跨湡鏁版嵁鍙婅绠楁暟鎹細

Vi(V2-V1)

V1

Uc

A(Vo/Vi)

V1+Uc

2

-0.498839306

0.501160694

0.506264782

0.002321389

3

-0.748254764

0.751745236

0.50625414

0.003490471

4

-0.997670172

1.002329828

0.506248846

0.004659656

5

-1.247085618

1.252914382

0.506245654

0.005828764

6

-1.496501064

1.503498936

0.506243527

0.006997872

鎺ュ湴

Vi(V2-V1)

V1()

Uc

A(Vo/Vi)

銆€

2

0

1

0.50585662

1

3

0

1.5

0.505846007

1.5

4

0

2

0.505840689

2

5

0

2.5

0.505837499

2.5

6

0

3

0.505835374

3

[2] 鏍囬锛?/td>
鍙戣〃璇勮浜猴細
1. 璇ヨ宸棤鐤戞槸宸姩鏀惧ぇ鍣ㄧ殑鍏辨ā鎶戝埗姣旂殑闂銆?br> 2. 杈撳叆闃绘姉浣庯紞锛嶈繖鏄熀鏈樊鍔ㄦ斁澶у櫒鐨勯棶棰橈紝瀵艰嚧涓や釜杈撳叆绔殑鍐呴樆褰卞搷鍏辨ā鎶戝埗姣斻€?br> 3. 杩欎簺浠跨湡锛岄兘涓嶈兘鍙嶆槧杩愭斁鏈韩鐨勬湁闄愮殑鍏辨ā鎶戝埗姣斿拰寮€鐜鐩婂甫鏉ョ殑闂銆?br> 4. 涓轰娇鐢佃矾寰楀埌鏈€楂樼殑鍏辨ā鎶戝埗姣旓紝锛?锛夌簿纭尮閰嶇數闃讳笌閫夋嫨楂樼簿搴﹁繍鏀撅紱鍜?鎴栵紙2锛夊皢涓よ緭鍏ョ鐭帴骞跺姞涓婁竴涓叡妯′俊鍙凤紝璋冭妭鍏朵腑涓€涓數闃伙紙閫氬父鏄繍鏀炬杈撳叆绔帴鍦扮殑鐢甸樆锛変娇杈撳嚭涓洪浂銆傞€氬父鍏冲績鐩存祦鍜屾煇浜涚壒娈婇鐐圭殑鍏辨ā鎶戝埗姣旓紙鍏辨ā澧炵泭锛夈€?br> 5. 鏈€濂芥槸閲囩敤闆嗘垚浠櫒鏀惧ぇ鍣紙涓夎繍鏀炬垨鍙岃繍鏀剧數璺級銆?br> 6. 璇峰弬鑰冩嫏涔︼細
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锛嶏紞鐜颁唬浠櫒鐢佃矾鈹€鈹€鐢佃矾璁捐鐨勫櫒浠惰В鍐虫柟妗堬紝涓浗绉戞妧鏂囩尞鍑虹増绀?br> 瀵逛华鍣ㄦ斁澶у櫒绛夋祴鎺х數璺垨浠櫒鐢佃矾鏈夋瘮杈冨垏鍚堝疄闄呯殑瑙h锛岀浉淇℃湁涓€瀹氬疄闄呯粡楠岀殑鍚屼粊璇诲悗浼氭湁鎰熷彈銆?br> 涓嶅ソ鎰忔€濓紝鏈夌偣鍙樻垚鍋氬箍鍛婄殑鎰忔€濅簡銆備絾鎷欎功瀵硅繖浜涢棶棰樿嚜璁や负鏈夌繑瀹炵殑鎻忚堪銆?br>鍗氫富鍥炲锛氳阿璋㈡偍鐨勫缓璁紒鎴戣繕鑻︿簬鎵剧浉鍏宠缁嗕粙缁嶇殑涔︾睄鍛紝杩欎笅鏂逛究浜嗭紝鍛靛懙
銆€鏈珯鍦板潃锛?a href="http://www.sciencenet.cn/blog/shenrj2005.htm">http://www.sciencenet.cn/blog/shenrj2005.htm
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