EE2231 Lab11

EE2231 Lab11 - This graph shows that the diode allows...

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Lab Session 11 – Transistor Curve Tracer Randall Robert Purpose: To apply the principles developed in the experiments performed so far to construct a transistor curve tracer, and to use the transistor curve tracer to measure the characteristics of npn transistors. Assembly: For all procedures, connect the figures in the lab manual and record the output using the scope. Procedures: (all figures are on page 6 of this report) 1. After assembling the circuit and making necessary scope adjustments the following graph was recorded. What values of Beta do you observe? Beta is approximately 150. 1
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Lab Session 11 – Transistor Curve Tracer Randall Robert 2. Replace the transistor with a diode and plot the graph. After replacing the transistor in figure 1 with a diode the following graph was recorded.
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Unformatted text preview: This graph shows that the diode allows current to flow once the voltage reaches ~0.7V. 2 Lab Session 11 Transistor Curve Tracer Randall Robert 3. After all previous steps were completed the transistor from procedure 1 was tested using the Tektronix 571 Curve Tracer. The values or the Tektronix 571 Curve Tracer are similar but Beta is slightly different. The 571 yielded that the transistor used in the previous step had a Beta of 196. 3 Lab Session 11 Transistor Curve Tracer Randall Robert Assignment: a. Design a curve tracer to work with pnp transistors. 4 Lab Session 11 Transistor Curve Tracer Randall Robert b. Design a curve tracer that can test both npn and pnp transistors. 5 Lab Session 11 Transistor Curve Tracer Randall Robert Original Circuit; 6...
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This note was uploaded on 01/25/2012 for the course EE 2231 taught by Professor Staff during the Spring '08 term at LSU.

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EE2231 Lab11 - This graph shows that the diode allows...

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