Consider the BJT amplifer shown below. In the mid-band frequency range, we expect the input impedance Rin to be given by the expression: Vcc sig Rsig Rin CB HH RB1 || RB2 | T RB1 RB2 (r +(B+1)RE) zero (due to CE) infinity (due to CB) RB1 | RB2 (r +Rsig) ww RB1 Vb RB2 ww -ww II RC RE Cc HH ww CE RL

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Consider the BJT amplifer shown below. In the mid-band frequency range, we
expect the input impedance Rin to be given by the expression:
Vcc
sig
Rsig
www
Rin
CB
HH
ww
RB1 || RB2 | T
RB1 RB2 (r +(B+1)RE)
zero (due to CE)
infinity (due to CB)
RB1 RB2 (r +Rsig)
RB1
Vb
RB2
ww
RC
RE
Cc
HH
ww11
CE
RL
Transcribed Image Text:Consider the BJT amplifer shown below. In the mid-band frequency range, we expect the input impedance Rin to be given by the expression: Vcc sig Rsig www Rin CB HH ww RB1 || RB2 | T RB1 RB2 (r +(B+1)RE) zero (due to CE) infinity (due to CB) RB1 RB2 (r +Rsig) RB1 Vb RB2 ww RC RE Cc HH ww11 CE RL
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