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RESISTIVE CIRCUITS. SINGLE NODE-PAIR CIRCUIT ANALYSIS. IN PRACTICE NODES MAY ASSUME STRANGE FORMS. THIS ELEMENT IS INACTVE (SHORT-CIRCUITED). LOW DISTORTION POWER AMPLIFIER. SINGLE NODE-PAIR CIRCUITS. THESE CIRCUITS ARE CHARACTERIZED BY ALL THE ELMENTS HAVING THE SAME VOLTAGE

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Presentation Transcript
slide1

RESISTIVE CIRCUITS

  • SINGLE NODE-PAIR CIRCUIT ANALYSIS
slide2

IN PRACTICE NODES MAY ASSUME STRANGE

FORMS

THIS ELEMENT IS INACTVE (SHORT-CIRCUITED)

LOW DISTORTION POWER AMPLIFIER

SINGLE NODE-PAIR CIRCUITS

THESE CIRCUITS ARE CHARACTERIZED BY ALL

THE ELMENTS HAVING THE SAME VOLTAGE

ACROSS THEM - THEY ARE IN PARALLEL

slide3

LOW VOLTAGE POWER SUPPLY FOR CRT - PARTIAL VIEW

SAMPLE PHYSICAL NODES

COMPONENT SIDE

CONNECTION SIDE

slide4

THE CURRENT DIVISION

APPLY KCL

USE OHM’S LAW TO REPLACE CURRENTS

DEFINE “PARALLEL RESISTANCE COMBINATION”

BASIC CURRENT DIVIDER

THE CURRENT i(t) ENTERS THE NODE AND

SPLITS - IT IS DIVIDED BETWEEN THE

CURRENTS i1(t) AND i2(t)

slide5

WHEN IN DOUBT… REDRAW THE CIRCUIT TO

HIGHLIGHT ELECTRICAL CONNECTIONS!!

IS EASIER

TO SEE THE

DIVIDER

slide6

POWER PER SPEAKER

LEARNING EXTENSION - CURRENT DIVIDER

CAR STEREO AND CIRCUIT MODEL

THERE IS MORE THAN ONE

OPTION TO COMPUTE I2

slide7

APPLY KCL TO THIS NODE

DEFINE “PARALLEL RESISTANCE COMBINATION”

FIRST GENERALIZATION: MULTIPLE SOURCES

slide9

APPLY KCL TO THIS NODE

Ohm’s Law at every resistor

General current divider

SECOND GENERALIZATION: MULTIPLE RESISTORS

slide10

20k||5k

General current divider

slide11

FIND THE CURRENT

NOTICE THE MINUS SIGN

COMBINE RESISTORS

COMBINE THE SOURCES

STRATEGY: CONVERT THE PROBLEM INTO A

BASIC CURRENT DIVIDER BY COMBINING

SOURCES AND RESISTORS.

THE NEXT SECTION EXPLORES IN MORE

DETAIL THE IDEA OF COMBINING RESISTORS

slide12

I2

I1

9mA

I1

I1

I2

I2

DIFFERENT LOOKS FOR THE SAME

ELECTRIC CIRCUIT

slide13

I1

I2

I1

REDRAWING A CIRCUIT

MAY, SOMETIMES, HELP TO

VISUALIZE BETTER THE

ELECTRICAL CONNECTIONS

I2

slide14

Determine power

delivered by source

+

V

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