Basic

ElectronicsBasic

ElectronicsLecture #6

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Transistors Ch.6

1947 FIRST POINT CONTACT TRANSISTOR

John Bardeen, Walter Brattain and William Shockleyand William Shockley

Bipolar transistors Ch.6

BIPOLAR TRANSISTOR

C – CollectorE – EmitterB BB – Base

VBE≈0.7VVBC ≈0.6V

BCBE rr >

A. NPN, Б. PNP

Bipolar transistors Ch.6

TRANSISTOR GHOST

Bipolar transistors Ch.6

POWER DISSIPATION AND LIMITS

Bipolar transistors Ch.6

WORKING MODES

S – Saturation point (Ханалтын цэг), C – Cutoff point (Хэрчилтийн цэг), Q Active point (Идэвхитэй цэг)Q – Active point (Идэвхитэй цэг)

Reminder… Ch.5

ZENER DIODE

R VREG

VLIM

V =13 5V

D

RLIM

VUR

RL

VREG

ILIZIT

III +

VUR=13.5VVREG=5VIL=0.35A

DLZT III +=

ZURLIMLIM II

VV

I

VR

+−

==

VZ=5.1VIZ=0.4A

LZT III +RLIM=?

Mobile phone charger from car battery

Ω==+−

= 2.11750

4.8

40350

1.55.13

A

V

AA

VVRLIM

WAVP 0424015

WAVPL 79.135.01.5 =⋅=

+ 75.04.035.0 AAA WAVPZ 04.24.01.5 =⋅=

WAVPRLIM 3.675.04.8 =⋅=%4.21%100 == LP

Eff+ RLIMZ PP

ff

Use of transistors Ch.6

CURRENT OR POWER AMPLIFIER

QUIZ: VUR=12V: PT1=? (7V·4A=28W)

Use of transistors Ch.6

EMITTER FOLLOWER

VVV BE 6.0−=

VV Δ=Δ BE VV Δ=Δ

OUTIN VV =

Use of transistors Ch.6

CURRENT SOURCE

Use of transistors Ch.6

CURRENT SOURCE

Use of transistors Ch.6

TRANSISTOR AMPLIFIER

?0; ∞→⇒→∞→ KRR EC

Use of transistors Ch.6

TRANSISTOR AMPLIFIER

Use of transistors Ch.6

CURRENT MIRROR

Use of transistors Ch.6

COMPLEMENTARY PAIRS – PUSH PULL FOLLOWER

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Use of transistors Ch.6

DARLINGTON AND SZIKLAI PAIRS

Дарлингтон хосын хурдыг сааруулагч празит багтаамж ба түүнийг эсэргүүцэгчээр дарах

Use of transistors Ch.6

DIFFERENTIAL AMPLIFIER

Non-Inverting Input

Inverting Input

Use of transistors Ch.6

2N3904

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