Resistor Theory - By Benjie Magallano.pptx

Basic Resistors Theory and application.

1. RESISTOR

2. Ohm’s Law I V R ”One microampere flowing in one ohm causes a one microvolt potential drop.”

3. DC & AC RESPONSE

4. Resistor’s circuit configuration

5. Series: Rtotal = R1 + R2 + R3 Rtotal = 18 k Ω The current and voltages in every resistor are:

6. Parallel: Rtotal = 625 Ω The current and voltages in every resistor are:

7. Delta or Wye :

8. Conversion: “Multiply the adjacent, divide by the sum” Tip:

9. Ex. Converting Delta to Wye

10. Redraw

11. Common uses of series, parallel and delta configuration;

12. BJT Collector Power rating – 0.6 watts Collector Power must be less than the maximum rating of the BJT. Base on the computed value, Ic is 0.84 mA , and Vce is 12.34 V. So the Collector power is just Vce * I = 10.37 mW . The BJT is safe.

13. THE END