BK Precision 4011A Betriebsanleitung PDF herunterladen (Seite 17)

Laboratory 3: Computer Analysis

20105

We shall use the simple circuit drawn below as an example.

Figure 3.1: Circuit #1

1. Using the rules for adding series resistances, Kirchhoff’s laws, and Ohm’s law, analyze the

circuit of Figure 3.1. Calculate the current I and the voltage drops across each of the resistors.

2. SPICE programs tend to use Node Analysis to analyze circuits. One node labeled ‘0’ serves

as the reference (ground) node. Number the nodes as shown below, then, using Ohm’s law

and Kirchhoff’s laws, calculate the voltages at each of the nodes, relative to the voltage at

Node 0.

Figure 3.2: Node labels

3. Construct and measure the circuit:

a) Preset the DC power supply to provide 5 volts output. Switch the DC power supply’s

OUTPUT OFF.

b) With the DC power supply’s OUTPUT OFF, construct the circuit in Figure 3.1.

c) Set up one of the Digital Multimeters (DMM) to measure DC current, with a scale setting

of at least 20 mA. Insert the DMM in series in the circuit to measure the current.

d) Switch the DC power supply’s OUTPUT ON, and measure the current, using the lowest

meter scale that is greater than the measured value. Record the reading.

e) Set up the second DMM to measure DC voltage greater than 5 volts. Use this DMM to

measure the voltage between Node 1 and Node 0. Record your reading. Then measure the

voltage between Node 2 and Node 0. Record your reading.

f) Turn the DC power supply’s OUTPUT OFF.

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1000 Ω

2000 Ω

Node 1

Node 2

Node 0

–

1000 Ω

2000 Ω

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BK Precision 4011A Betriebsanleitung Seite 17