voltage gain vs frequency response of amplifier
from figure shown
- From origin to FL is called as lower cutoff frequency
- FL to FH is called as midband region
- FH to infinity is called as upper cutoff frequency
lower cutoff frequency due to coupling capacitors (coupling capacitor info electronics152.blogspot.com)
upper cutoff frequency due to junction capacitors(discussed below)
junction capacitors are the capacitors fixed between two terminal of transistor as shown above
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