Lab #1 - Diodes

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Diodes

/ 1qV nkTsI I e

ln 1s

nkT IV

q I

I

VReverse saturation region

Forward conduction region

Von

Vbr

I

V

Forward conduction region

Von

Vbr

Real Diode Characteristic Simple Approximation

V

I

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LEDs

Reflector

LED symbol

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Diode Biasing

Vd

1 kΩ Vs

A

V

Id

12 V Vd

R

Id

12 V Vd

R

Id

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Series Diodes

470 Ω

Vs

5 V Vout1 kΩ12 VVout

1 kΩ

12 VVout

1 kΩ

RL

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Diodes in Parallel

Vs

R

RVsR

Vs

R

GreenRedGreen

Red

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Limiters/Rectifiers

Vin

Vout

tVoutVin 10 kΩ

Vout

Vin

10 kΩ

VoutVin 10 kΩ

CL AC in

Bright

Off

DimLamp

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Limiters

Vin

10 kΩ

Vout Vin

1 kΩ

Vout

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Diode Logic

Vout

470 Ω

V1

V2 Vout

470 Ω

V1

V2

+5 V

+5 V

470 Ω

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Zener Diodes

Vz

Iz

Iz

Vz

10 6.8 3.3

1N746A1N754A1N758A

Vin

10 kΩ

Vout

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Voltage Multipliers

1 μF

Vin

Vout

100 kΩ1 μF

Vin

Vout

Vin

Vout

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Scope Grid