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Class 8 - PowerPoint PPT Presentation


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V S+. ∞. IN. 1. OUT. R B. R 0. R L. V S-. Class 8. The application of the current mirror for approaching the voltage gain of the CC to 1. I C0 + i out. R L. V S. v in. V B0. R EG. Class 8. Current generator The forced DC current on R L T he trans-conductance

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Presentation Transcript
class 8

VS+

IN

1

OUT

RB

R0

RL

VS-

Class 8

The application of the current mirrorfor approaching the voltage gain of the CC to 1

class 81

IC0 + iout

RL

VS

vin

VB0

REG

Class 8
  • Current generator
  • The forced DC current on RL
  • The trans-conductance
  • The output resistance
class 82

VS+

IN

OUT

RB

R1

R2

REG

VS-

Class 8
  • Use of the large output impedance: active load.
class 83

vo1

vo2

VS+

RC

1

IN

voutd

RL1

2

RB

RE

RL2

VS-

Class 8
  • Phase splitter
  • Voltage gains
  • Differential output
class 84

C

C

B

1

2

2

B

1

E

E

Class 8
  • Pairs of transistors
  • Darlington composite (Sziklai)
  • Parameters of the resulting transistors:
  • h21(D) = (h21)2h21(c) = (h21)2
  • h11(D) = h11(1)+h21h11(2)= 2h11(1)h11(c) = h11(1)
  • g21(D) = 0.5g21(2)g21(c) = g21(2)
  • Physical model