active loads

active loads - ECEN 326 Electronic Circuits Active Loads...

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Unformatted text preview: ECEN 326 Electronic Circuits Active Loads Dr. Aydn Ilker Kar slayan Texas A&M University Department of Electrical and Computer Engineering BJT Common Emitter BJT Common Emitter Simple current source L R o R I REF V CC Q 2 Q 3 V o i V Q 1 R o = r o1 R L = r o2 G m =- g m1 v o v i = G m (R o k R L ) ECEN 326 Electronic Circuits - Aydn I. Kar slayan - Active Loads 1 MOS Common Source MOS Common Source Simple current source L R o I REF V DD R V o V i 1 3 M M 2 M R o = r o1 R L = r o2 G m =- g m1 v o v i = G m (R o k R L ) ECEN 326 Electronic Circuits - Aydn I. Kar slayan - Active Loads 2 BJT Common Emitter BJT Common Emitter Cascode current source V CC Q 3 Q 5 Q 2 Q 4 R R o I REF L V o V i Q 1 R o = r o1 R L r o2 2 G m =- g m1 v o v i = G m (R o k R L ) ECEN 326 Electronic Circuits - Aydn I. Kar slayan - Active Loads 3 MOS Common Source MOS Common Source Cascode current source DD M 3 V L R o I REF R V o V i M 2 M 1 4 M 5 M R o = r o1 R L = r o2 + r o3 + g m2 r o2 r o3 G m =- g m1 v o v i = G m (R o k R L ) ECEN 326 Electronic Circuits - Aydn I. Kar slayan - Active Loads 4 BJT Cascode BJT Cascode Passive load R o R V o V Q 2 V CC L B 1 Q V i R o = (r o1 k r 2 ) + r o2 + g m2 (r o1 k r 2 )r o2 R o r o2 G m - g m1...
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active loads - ECEN 326 Electronic Circuits Active Loads...

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