BK Precision 4011A Instrucciones de operaciones descargar pdf (Pagina 19)

Laboratory 3: Computer Analysis

20107

7. Analyze another circuit by hand and again with B2 SPICE:

Figure 3.4: Circuit #2

a) Label the nodes in the above circuit.

b) By hand, calculate all of the node voltages and branch currents for the circuit.

c) Create the circuit in B2 SPICE.

d) Use B2 SPICE to simulate the circuit. Save the output.

e) Record the node voltages and branch currents predicted by B2 SPICE. These are most

easily seen by using SHOW VOLTAGE TEXT and SHOW CURRENT TEXT and SHOW BRANCH

CURRENTS to display the results on the circuit diagram.

f) Construct a well organized table to report your results from steps b and e. Compare the

B2 SPICE predictions and your hand calculations.

g) Modify the circuit by changing the value of the 2Ω resistor to 18Ω. Record in another

column of your table the node voltages and branch currents calculated by B2 SPICE.

Step 7g shows the power of using software for circuit simulation and analysis. The engineer

can see almost instantly the result of changing the values of one or more circuit elements,

without spending many minutes (or hours) cranking through the equations.

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3 Ω

2 Ω

60 V

1 Ω

10 Ω

6 Ω

4 Ω

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BK Precision 4011A Instrucciones de operaciones Pagina 19