Microelectronic System Design Concepts Illustrated Through Graphics
Explore various current mirror configurations such as BJT current mirrors, the Widlar current source, Wilson current mirrors, and more. Each image depicts a specific electronic design concept with detailed explanations.
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Presentation Transcript
BJT current mirrors BJT simple current mirror V V V V V V BE V BE V = 1 + = 1 + - 2 2 CB V CE V I I e I e BE T T 2 2 2 C S S A A A V V V V V V BE V BE V = 1 + = 1 + - 1 1 CB V CE V I I e I e BE T T 1 1 1 C S S A A A I I A A area area = = = 2 S k 2 2 E M 1 1 1 S E I I = 2 C K Vout=Vin M 1 C P. Bruschi Microelectronic System Design 1
BJT simple current mirror P. Bruschi Microelectronic System Design 2
Simple mirror with emitter degeneration P. Bruschi Microelectronic System Design 3
The Widlar current source A non-linear current mirror P. Bruschi Microelectronic System Design 4
BJT cascode mirror P. Bruschi Microelectronic System Design 5
BJT cascode current mirror P. Bruschi Microelectronic System Design 6
Current mirrors with beta-helper P. Bruschi Microelectronic System Design 7
Beta helper + emitter degeneration P. Bruschi Microelectronic System Design 8
Mirrors in the 741 Widlar Current source Beta helper + Emitter deg. P. Bruschi Microelectronic System Design 9
Wilson current mirror 3-transistor version = + I I I 1 4 in C B = + V V V 2 4 H BE BE H @ I I 1 k 2 4 C C @ I I 1 2 C C M P. Bruschi Microelectronic System Design 10
Wilson Current Mirror 1 @ I I 1 2 C C k M P. Bruschi Microelectronic System Design 11
4-transistor Wilson current mirror P. Bruschi Microelectronic System Design 12
