EE3110-AEC-2008-Monolithis Circuit Techniques

# EE3110-AEC-2008-Monolithis Circuit Techniques -...

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EE3110: Analogue Electronic  Circuits Monolithic Circuit Techniques

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5. Monolithic Circuit Techniques 1. Current Mirrors Rashid: ch11 V + V - I R E F Q 1 Q 2 R 1 I C 1 I O I B 1 I B 2 1 R V V V I BE REF - - = - + + + + = β 2 1 2 2 1 1 C B B C REF I I I I I β 2 1 2 + = = REF O C I I I O A o O I V r R : resistance Output =
1. Three Transistor Current Source V + V - I R E F Q 1 Q 2 Q 3 R 1 I C 1 I O I B 1 I B 2 I B 3 ( 29 + + + + = 3 2 3 3 1 1 2 1 1 β β β C E C REF I I I I ( 29 3 2 1 2 1 β β + + = = REF O C I I I A better approximation for I O    I REF

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1. Wilson Current Source V + V - I R E F Q 1 Q 2 Q 3 R 1 I C 1 I O I B 1 I B 2 I B 3 ( 29 β β + + = = 1 2 1 3 REF O C I I I 2 3 o O r R : resistance Output β
1. Widler Current Source V + V - I R E F Q 1 Q 2 R E R 1 I C 1 I O I B 1 I B 2 T BE T BE V V S C O V V S C REF e I I I and e I I I / 2 / 1 2 1 = = = = - = = O

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