Circuits with Series and Parallel ResistorsImpedances

About This Presentation

Title:

Circuits with Series and Parallel ResistorsImpedances

Description:

Impedances are combined to create a simple circuit (usually one source and one ... zeq = (0.1 xl)*xc /(0.1 xl xc) zeq = 6.8687e 03 - 1.0981e 03i. Lecture 23. 24 ... – PowerPoint PPT presentation

Number of Views:69

Avg rating:3.0/5.0

Slides: 26

Provided by: darrylm

Category:

more less

Transcript and Presenter's Notes

Title: Circuits with Series and Parallel ResistorsImpedances

1
Circuits with Series and Parallel
Resistors/Impedances
2
Solving Circuits with Series and Parallel
Combinations

The combination of series and parallel impedances
can be used to find voltages and currents in
circuits.
This process can often yield the fastest
solutions to networks.
This process may not apply to complicated
networks.

3
Series and Parallel Impedances

Impedances are combined to create a simple
circuit (usually one source and one impedance),
from which a voltage or current can be found
Once the voltage or current is found, KCL and KVL
are used to work back through the network to find
voltages and currents.

4
Example Resistor Ladder

Find V1, V2, and V3

5
Example Resistor Ladder
1kW
1kW
1kW

1kW
10V
2kW
2kW
-

Find an equivalent resistance for the network
with V1 across it, then find V1 using a voltage
divider.

6
Example Resistor Ladder
7
Example Resistor Ladder
1kW
1kW
1kW

1kW
10V
2kW
2kW
-

Find an equivalent resistance for the network
with V2 across it, then find V2.

8
Example Resistor Ladder
9
Example Resistor Ladder
10
Example Notch Filter
70.4mH
0.1W
100W

1kW
10V ? 0?
Vout
100mF
-
-

Find Vout
Use w 1500

11
Example Notch Filter
Vout

Find the equivalent impedance of the resistor,
inductor, and capacitor.

12
Example Notch Filter
7.12W ? -89.99?
100W

1kW
10V ? 0?
Vout
-
-

Combine resistor and impedance.

13
Example Notch Filter
14
Example Notch Filter
15
Example Notch Filter
70.4mH
0.1W
100W

1kW
10V ? 0?
Vout
100mF
-
-

Find Vout
Use w 377

16
Example Notch Filter

Vout 1.23V ? -0.17?

17
Frequency Response
18
Using MATLAB to Solve Circuits
19
MATLAB

MATLAB can perform computations with complex
numbers.
You can use it as a calculator to compute phasors
and impedances for AC SS analysis.
You can also use it to automate computations of
frequency responses.

20
Using MATLAB