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RESISTIVE CIRCUITS

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  1. RESISTIVE CIRCUITS • SINGLE NODE-PAIR CIRCUIT ANALYSIS

  2. 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

  3. LOW VOLTAGE POWER SUPPLY FOR CRT - PARTIAL VIEW SAMPLE PHYSICAL NODES COMPONENT SIDE CONNECTION SIDE

  4. 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)

  5. WHEN IN DOUBT… REDRAW THE CIRCUIT TO HIGHLIGHT ELECTRICAL CONNECTIONS!! IS EASIER TO SEE THE DIVIDER

  6. POWER PER SPEAKER LEARNING EXTENSION - CURRENT DIVIDER CAR STEREO AND CIRCUIT MODEL THERE IS MORE THAN ONE OPTION TO COMPUTE I2

  7. APPLY KCL TO THIS NODE DEFINE “PARALLEL RESISTANCE COMBINATION” FIRST GENERALIZATION: MULTIPLE SOURCES

  8. APPLY KCL TO THIS NODE Ohm’s Law at every resistor General current divider SECOND GENERALIZATION: MULTIPLE RESISTORS

  9. 20k||5k General current divider

  10. 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

  11. I2 I1 9mA I1 I1 I2 I2 DIFFERENT LOOKS FOR THE SAME ELECTRIC CIRCUIT

  12. I1 I2 I1 REDRAWING A CIRCUIT MAY, SOMETIMES, HELP TO VISUALIZE BETTER THE ELECTRICAL CONNECTIONS I2

  13. Determine power delivered by source + V _