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1. Transistor (Intrinsic emitter resistance, ) Transconductance, overall gain G , , . , emitter ? G , . Transistor . Dynamic Resistance , .
2. Ebers-Moll Equation Transistor Collector . Transistor Transistor .Collector ,
Ebers-Moll Equation . Exponential -1
. 300k ,
. , .-Ebers-Moll Equation
, Transconductance ,
.
.
3. Grounded Emitter Amplifier
V (triangle wave) ,
, triangle
wave , . .
, . ,
G .Transistor gain .
emitter ,
. . base collector , Negative Feedback .
4. Current Mirror Current Mirror . Q1 Transistor R V
.
Q1, Q2 Base Q2 .Current Mirror , . n, 1/n .
5. Temperature effects
, Transistor ,
. , T exponential
, . exponential . , ~9%/ , 2/ .
-Current Mirror , Q1, Q2 , . Q1 Transistor Transistor . . Q1 Q2 , Q2 , . Q2 Q1 . Current Mirror .
A. Negative Feedback
Transistor Emitter , Negative Feedback . , Transistor . , . G .
B. High Gain in AC
, gain .
, , ,
Transistor . High-pass Filter , 0.1R .
.
6. Early Effect
, current source , . , current source , current source . , Early Effect .Early Effect , . saturation region .
, 0.2V 15V . Q1 Q2 15V Early Effect 1.5 . , , . .
,
.
.
A. Wilson Mirror
Q2 0.6V .B. Negative Feedback
, 0.1V Q2 Negative Feedback . , .
7. Using Early Effects to Estimate , , . Early Effect . 0.1V . 0.1 .
.
1 : Dynamic Curve Tracer
:Tracer Diode, Transistor .
A. Diode Curve
Curve Tracer . /div, V/div , .H,V scope Ebers-Moll's Equation .
Diode , Diode .
B. Transistor Curve
Diode Transistor
.
Transistor Base Emitter , E B Diode
.
: A , 100/decade, B
60/decade .
2 : Grounded Emitter Amplifier : Gain, , .
.Collector , 10 triangle wave, clipping . .15 . 15 function generator . : 15 triangle wave , , .
3 : Current Mirror : Current Mirror , Mirror .A. Simple Mirror1. Discrete Transistors
Current Mirror . P r . Transistor , P r .2. Matched Transistors
2N3906 Transistor .B. Wilson Mirror
Wilson Mirror . current mirror . : mirror , A-2, B .
4 : Ebers-Moll Equation : Collector ( ) Ebers-Moll Equation .
. R . .
: Ebers-Moll Equation ,
60/decade .
5 : Biasing: Good and Bad : Biasing , .A. Biasing with DC Feedback
. DC Feedback , .Collector 11 , , . Transistor .
B. An Example of BADBiasing A , 68 Collector C . clipping , 1000 Diode .Diode , 68 C correct biasing .feedback , DC feedback signal feedback .6.8 .
: A , negative feedback , B .
6 : Push-Pull : .
Crossover distortion . sine wave, 1 . Function Generator offset 0 . , dc offset control . : .
The Art of Electronics, Paul Horowitz, Winfield Hill, Cambridge University Press.http://tcada.iitkgp.ernet.in/netlab/current%20gain.htmlhttp://diranieh.com/Electrenicas/OpAmps1.htmhttp://en.wikipedia.org/wiki/Early_effecthttp://diranieh.com/Electrenicas/BJT_2.htm