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0.605 REB > Rce 0.6 17 E B Figure-7e IDENTIFIED AS PNP Table 7-b: PNP Transistor Meter Leads Step No. High / Low Resistance DMM Reading Red Lead Black Lead (+) (-) Base Emitter Emitter Base 3 Base Collector Collector Base 5 Collector Emitter Emitter Collector

0.605 REB > Rce 0.6 17 E B Figure-7e IDENTIFIED AS PNP Table 7-b: PNP Transistor Meter Leads Step No. High / Low Resistance DMM Reading Red Lead Black Lead (+) (-) Base Emitter Emitter Base 3 Base Collector Collector Base 5 Collector Emitter Emitter Collector

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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0.605 REB > Rce 0.617 E В E Figure-7e IDENTIFIED AS PNP Table 7-b: PNP Transistor Meter Leads Step No. High / Low DMM Reading Red Lead Black Lead Resistance (+) (-) Base Emitter Emitter Base 3 Base Collector 4 Collector Base 5 Collector Emitter 6. Emitter Collector B.
Transcribed Image Text:0.605 REB > Rce 0.617 E В E Figure-7e IDENTIFIED AS PNP Table 7-b: PNP Transistor Meter Leads Step No. High / Low DMM Reading Red Lead Black Lead Resistance (+) (-) Base Emitter Emitter Base 3 Base Collector 4 Collector Base 5 Collector Emitter 6. Emitter Collector B.
PROCEDURE 7-a) BJT type and leads identification. Step 1: Rotate the selector dial on DMM to select the option marked with a diode symbol. Step 2: Since, most of the time transistors have their base lead at the center, so presuming the same situation, connect the red probe at the center o the given device as shown in figure 7-b. Step 3: Now connect the black probe one by one at the other two leads of the transistor, keeping the red lead in place, as shown in figure 7-b. if the assumption made in the first step was right, the DMM would display some reading showing forward biasing of ED and CD. Record the larger reading in the Base-Emitter row and the smaller one in Base-Collector row in table 7-a for NPN transistor. Step 4: Now connect the black probe at the center lead replacing the red probe and repeat step 3 with the red probe. This time, the DMM should display infinite resistance showing reverse biasing of ED and CD. Step 5: In case any of the results doesn't match the above mentioned findings, select the remaining two leads one by one presuming as the base lead and repeat all of the above steps until the results match. Step 6: Repeat all the above mentioned steps to identify the given PNP transistor and its leads keeping in mind that the roles of red and black leads are now reversed. Readings obtained for PNP are to be recorded in table 7-b.
Transcribed Image Text:PROCEDURE 7-a) BJT type and leads identification. Step 1: Rotate the selector dial on DMM to select the option marked with a diode symbol. Step 2: Since, most of the time transistors have their base lead at the center, so presuming the same situation, connect the red probe at the center o the given device as shown in figure 7-b. Step 3: Now connect the black probe one by one at the other two leads of the transistor, keeping the red lead in place, as shown in figure 7-b. if the assumption made in the first step was right, the DMM would display some reading showing forward biasing of ED and CD. Record the larger reading in the Base-Emitter row and the smaller one in Base-Collector row in table 7-a for NPN transistor. Step 4: Now connect the black probe at the center lead replacing the red probe and repeat step 3 with the red probe. This time, the DMM should display infinite resistance showing reverse biasing of ED and CD. Step 5: In case any of the results doesn't match the above mentioned findings, select the remaining two leads one by one presuming as the base lead and repeat all of the above steps until the results match. Step 6: Repeat all the above mentioned steps to identify the given PNP transistor and its leads keeping in mind that the roles of red and black leads are now reversed. Readings obtained for PNP are to be recorded in table 7-b.
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