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1. |
__An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are__ |
A. | fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz |
B. | fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz |
C. | fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz |
D. | fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz |
Answer» C. fT =1.33 x 1012 Hz & f≈í‚â§ = 1.47 x 1010 Hz | |