L17Part3 7.6FreqRespfDiffAmp_1B&W

L17Part3 7.6FreqRespfDiffAmp_1B&W - EE 311 L17 Part...

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Unformatted text preview: EE 311 L17 Part 3 EE 311 L17 Part 3 EEO 311 L16 Part 3 EEO 311 L16 Part 3 7.6 Frequency Response of the 7.6 Frequency Response of the Differential Amplifier Differential Amplifier Note: this parallels the discussion of the MOS Diff Amp Note: this parallels the discussion of the MOS Diff Amp In Section 7.6 of 5 In Section 7.6 of 5 th th edition edition Zubair Rehman Symmetrically excited differential pair has same frequency response as CE Stage. V o / V S = A midband / (1 + s / p ) A midband = A vo = A o = (V o / V b ) * (V b / V S ) = g m R c * [r / (R S /2 + r )] p = 1 / [R t C t ] R t = r || (R s /2) & C t = C + C (1 + g m R c ) Fig. 7.29 (b) Equivalent Half-Circuit CE Stage R e = 0 R c = R c R b = R s /2 Adding Emitter Resistance R Adding Emitter Resistance R E E R = R 10 & R = R 20 Equivalent Equations For R Equivalent Equations For R 10 10 & R & R 20 20 Eq. 7.99 in 4 th edition...
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L17Part3 7.6FreqRespfDiffAmp_1B&W - EE 311 L17 Part...

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