* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download ppt_ch09
Survey
Document related concepts
Topology (electrical circuits) wikipedia , lookup
Josephson voltage standard wikipedia , lookup
Wilson current mirror wikipedia , lookup
Operational amplifier wikipedia , lookup
Schmitt trigger wikipedia , lookup
Power MOSFET wikipedia , lookup
Current source wikipedia , lookup
Power electronics wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Voltage regulator wikipedia , lookup
Opto-isolator wikipedia , lookup
Surge protector wikipedia , lookup
Rectiverter wikipedia , lookup
Current mirror wikipedia , lookup
Transcript
Chapter Kirchhoff’s Laws Topics Covered in Chapter 9 9-1: Kirchhoff’s Current Law (KCL) 9-2: Kirchhoff’s Voltage Law (KVL) 9-4: Node-Voltage Analysis 9-5: Method of Mesh Currents 9 9-1: Kirchhoff’s Current Law (KCL) The sum of currents entering any point in a circuit is equal to the sum of currents leaving that point. Otherwise, charge would accumulate at the point, reducing or obstructing the conducting path. Kirchhoff’s Current Law may also be stated as IIN = IOUT Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Fig. 9-1: Current IC out from point P equals 5A + 3A into P. 9-2: Kirchhoff’s Voltage Law (KVL) Loop Equations A loop is a closed path. This approach uses the algebraic equations for the voltage around the loops of a circuit to determine the branch currents. Use the IR drops and KVL to write the loop equations. A loop equation specifies the voltages around the loop. 9-2: Kirchhoff’s Voltage Law (KVL) Loop Equations ΣV = VT means the sum of the IR voltage drops must equal the applied voltage. This is another way of stating Kirchhoff’s Voltage Law.