Figure 511
(A) for the Circuit Shown in Fig $\lambda$ ) That

Figure 5.1.1
(a) For the circuit shown in Fig. 5.1.1(a), show (neglecting $\lambda$ ) that
$$V=V_{t}+\sqrt{\frac{2 I}{k_{n}^{\prime}(W / L)}}$$
(b) The MOSFETs in the circuit of Fig. 5.1.1(b) [6 points] have $V_{t}=0.4 \mathrm{~V}, k_{n}^{\prime}=0.4 \mathrm{~mA} / \mathrm{V}^{2}$ , and $\lambda=0$ . Find $(W / L)_{1},(W / L)_{2}$ , and $(W / L)_{3}$ to obtain the reference voltages shown.