Electronic Devices - BJT and FET Frequency Response - Discussion
Discussion Forum : BJT and FET Frequency Response - General Questions (Q.No. 8)
8.
A 3-dB drop in hfe will occur at a frequency defined by ________.
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Discussion:
1 comments Page 1 of 1.
Millize said:
4 years ago
hfe = hfemid/[1+j(f/fβ)] if f = fβ then,
hfe = hfemid/(1+j); 1/(1+j) = 0.5-0.5j, in polar form =0.707 * 45,
hfe = 0.707hfemid, which indicates a half power point since 20log(0.707) = -3.01 dB which indicates a 3-dB drop in hfe.
hfe = hfemid/(1+j); 1/(1+j) = 0.5-0.5j, in polar form =0.707 * 45,
hfe = 0.707hfemid, which indicates a half power point since 20log(0.707) = -3.01 dB which indicates a 3-dB drop in hfe.
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