b) Figure Q4 b shows a common-source amplifier circuit. The amplifier

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b) Figure Q4 b shows a common-source amplifier circuit. The amplifier has a gm of 4 mA/V2 and the transistor's internal resistance and capacitance as follows: ro = 150 kΩ, Cgs = 10 pF, and Cgd = 1 pF. Determine: i) The mid-band gain AM ii) The lower 3-dB frequency fL by assuming fLG as the dominant frequency (associated with the coupling capacitor Ci ). iii) The upper 3-dB frequency fH. Figure Q4 b

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b) Figure Q4b shows a common-source amplifier circuit. The amplifier has a

g_{m}

of

4 m A / V^{2}

and the transistor's internal resistance and capacitance as follows:

r_{o} = 150 k Ω, C_{g s} = 10 p F, and C_{g d} = 1 p F .

Determine: i) The mid-band gain

A_{M}

ii) The lower 3-dB frequency

f_{L}

by assuming

f_{L G}

as the dominant frequency (associated with the coupling capacitor

C_{i}

). iii) The upper 3-dB frequency

f_{H}

. Figure Q4b

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