Question

(a) Determine R, R,, and R Assume gr1 (b) Determinei,,i,ふi4.is, is, and i,' alf in terms oft,. (Hini; Use the current-divider rule at the drain of Q,) (c) Determine v, t, and u, all in terms of v, (d) If บุ is a 5-mV peak sine wave and RJ,-20, sketch and clearly label the waveforms of v, U, and t, D 7.68 Design the double-cascode current source shown in Fig. P7.68 to provide 0.2 mA and the largest possible sig- nal swing at the output; that is, design for the minimum allow- able voltage across each transistor. The 0.13-um CMOS fab- rication process available has V,--0.4 V, V--6 V/ym, and μpCor-100 μ A/V2. Use devices with 0.4 μm, and operate at Vo0.2 V. Specify Va Va: Vas and the WIL ratios of the transistors. What is the value of R, achieved? 2i 02 03 VG3 R, Figure P7.68 utlizing a simple current source Q, supplying a current 21 a cascoded current source (Q Q,) supplying a current Figure P7.69 shows a folded-cascode CMOS amplifier . Assume, for simplicity, that all transistors have equal

Answer 1

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