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+12 V Transfer curve for the given JFET Q3 (30 p.) For the given amplifier circuit, find input impedance (Zi), output impedan

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+12V 3.3ka vo D HE C2 Vi 카 a G s Answers 10mm Zi = 10Mr Ilkn Cs = 20 M Zo = 3.3 kr Vo -8-8 Vi Given I oss 8 m.A Up 11 - 6V 8Given that the The JFEF is in Saturation mode. So loss at Saturation Ipss (1-Vas 1) so TD Toss - Toss (1-vas Up so (-verse1 wJun gmo 2 IDss Ivel SO ш 2 (8x163) 6 Im - 2.667 ms -0 Given J FET A.C. equivalent circuit * Make Dic Sources zero i.e. 12u -oInput impedance (Zi): Z; 10 мл 2 output Impedance (20) : Zo by making (3.3 km) || vd Source que vas =O A Vd >> 3.3 ki fie. OdVo Vi (-gue) ( 313x103) vo (-9m) (3.3x103) vi but from © we know gm = 2.667 ms So sls Vo V: - 2.66 7 X10 x103 x 3.3 x 103 - 2

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