a. If h re = 210 -4 at I C = 1 mA on Fig. 5.124, determine
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a. If hre = 210-4 at IC = 1 mA on Fig. 5.124, determine the approximate value of hre at 0.1 mA.
b. For the value of hre determined in part (a), can hre be ignored as a good approximation if Av = 210?
Fig. 5.124
Transcribed Image Text:
Relative magnitude of parameters 50 20 hoe t) 1아, hie (pe) 2-hre a Ic=1 mA VCE = 5 V T= 25°C f= I kHz 0.5 hfe (e) 0.2 ....... 0.1 hoe ) hie (B) 0.05 0.02 F 0.01 0.1 0.2 0.5 5 10 20 50 Ic (mA) FIG. 5.124
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Electronic Devices And Circuit Theory
ISBN: 9781292025636
11th Edition
Authors: Robert Boylestad, Louis Nashelsky
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