8.28 Find the output resistance of each of the two current sources designed in Example 8.5. Let VA = 100 V and β = 100. 10 MΩ; 54 MΩ

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8.27 For β = 100 and ro = 100 kΩ, contrast the Wilson mirror and the simple mirror by evaluating the current transfer-ratio error due to finite β, and the output resistance. Transfer-ratio error: 0.02% for Wilson as opposed to 2% ...

8.26 For a cascode MOS mirror utilizing devices with Vt = 0.5 V, μnCox = 387 µA/V2, V1a = 5V/µm, W/L = 3.6 µm/0.36 µm, and IREF = 100 µA, find the minimum voltage required at the output and the ...

8.25 For the source follower in Fig. 8.35(a), let the bias current of Q1 be 200 µA and assume Q1 is operating at VOV = 0.2 V. If VA = 5 V and χ = 0.2, find the voltage gain ...

8.24 Consider the BJT cascode amplifier of Fig. 8.34 when biased at a current of 0.2 mA. Assuming that npn transistors have β = 100 and VA = 5 V and that pnp transistors have β = 50 and |VA| ...

8.23 Find an expression for the maximum voltage gain achieved in the amplifier of Fig. 8.34.

8.22 Consider a cascode amplifier for which the CS and CG transistors are identical and are biased to operate at ID = 0.1 mA with VOV = 0.2 V. Also let VA = 2 V. Find Av1, Av2, and Av ...

8.21 The cascode amplifier in Fig. 8.31 is operated at a current of 0.2 mA with all devices operating at|Vov|=0.2V. All devices have |VA| = 2 V. Find gm1, the output resistance of the amplifier, Ron, and the output resistance ...

8.20 Consider the cascode amplifier of Fig. 8.31 with the dc component at the input, VI = 0.7 V, VG2 = 1.0 V, VG3 = 0.8 V, VG4 = 1.1 V, and VDD = 1.8 V. If all devices are ...

D8.19 If in Example 8.4, L of each of Q3 and Q4 is halved while W/L is changed to allow ID and VOV to remain unchanged, find the new values of Ro and W/L. [Hint: In computing the required (W/L), ...