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Consider the CMOS op amp of Fig. 9.37 when fabricated in a 0.13-µm CMOS technology for which μnCox = 4µpCox = 512 µA/V2, |Vt| = 0.4 V, and VDD = VSS = 0.65 V. For a particular design, 1 = 128 µA, (W/L), = (W/L)2 = 1/2(W/L)5 = 44.4, and (W/L)3 = (W/L)4 = 11.1. (a) Find the (W/L) ratios of Q6 and Q7 so that I6 = 128 µA. (b) Find the overdrive voltage, |Vov|, at which each of Q1, Q2, and Q6 is operating. (c) Find gm for Q1, Q2, and Q6. (d) If|VA|= 3.2 V, find ro2, ro4, ro6 and ro7 (e) Find the voltage gains A1 and A2, and the overall gain A.

Consider the CMOS op amp of Fig. 9.37 when fabricated in a 0.13-µm CMOS technology for which μnCox = 4µpCox = 512 µA/V2, |Vt| = 0.4 V, and VDD = VSS = 0.65 V. For a particular design, 1 = 128 µA, (W/L), = (W/L)2 = 1/2(W/L)5 = 44.4, and (W/L)3 = (W/L)4 = 11.1. (a) Find the (W/L) ratios of Q6 and Q7 so that I6 = 128 µA. (b) Find the overdrive voltage, |Vov|, at which each of Q1, Q2, and Q6 is operating. (c) Find gm for Q1, Q2, and Q6. (d) If|VA|= 3.2 V, find ro2, ro4, ro6 and ro7 (e) Find the voltage gains A1 and A2, and the overall gain A.

Consider the CMOS op amp of Fig. 9.37 when fabricated in a 0.13-µm CMOS technology for which μnCox = 4µpCox = 512 µA/V2, |Vt| = 0.4 V, and VDD = VSS = 0.65 V. For a particular design, 1 = 128 µA, (W/L), = (W/L)2 = 1/2(W/L)5 = 44.4, and (W/L)3 = (W/L)4 = 11.1. (a) Find the (W/L) ratios of Q6 and Q7 so that I6 = 128 µA. (b) Find the overdrive voltage, |Vov|, at which each of Q1, Q2, and Q6 is operating. (c) Find gm for Q1, Q2, and Q6. (d) If|VA|= 3.2 V, find ro2, ro4, ro6 and ro7 (e) Find the voltage gains A1 and A2, and the overall gain A.

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Consider the CMOS op amp of Fig. 9.37 when fabricated in a 0.13-µm CMOS technology for which μnCox = 4µpCox = 512 µA/V2, |Vt| = 0.4 V, and VDD = VSS = 0.65 V. For a particular design, 1 = 128 µA, (W/L), = (W/L)2 = 1/2(W/L)5 = 44.4, and (W/L)3 = (W/L)4 = 11.1. (a) Find the (W/L) ratios of Q6 and Q7 so that I6 = 128 µA. (b) Find the overdrive voltage, |Vov|, at which each of Q1, Q2, and Q6 is operating. (c) Find gm for Q1, Q2, and Q6. (d) If|VA|= 3.2 V, find ro2, ro4, ro6 and ro7 (e) Find the voltage gains A1 and A2, and the overall gain A.

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