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The circuit shown in the figure is a differential amplifier. Formulas: 𝐼𝐸 , π‘”π‘š = 𝐼𝐢 𝑉𝑇 , 𝑉𝑑 = 25mV Assume 𝛽 = 100, 𝑅𝐸 = 100Ω,𝑅𝐸𝐸 = 200π‘˜β„¦,𝑅𝐢 = 10π‘˜β„¦, calculate: (1) Input differential resistance. (2) The differential voltage gain (neglect π‘Ÿ0) (3) The worst common-mode gain if the two collector resistances are accurate to within Β±1% (4) The CMRR (common mode suppression ratio) in dB. (5) The input common mode resistance (assume that the early voltage 𝑉𝐴=100V).

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π‘Ÿπ‘› = π‘‰π‘Ÿ
, π‘Ÿπ‘’ = π‘‰π‘Ÿ...
Differential Amplifier Analysis
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