A voltage-follower feedback circuit is shown in Fig. 8.58. For the MOS transistor, I D = 0.5

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A voltage-follower feedback circuit is shown in Fig. 8.58. For the MOS transistor, ID= 0.5 mA, k€™ = 180 µA/V2, ro= ˆž, W/L = 100, |Ï•f| = 0.3 V, and γ = 0.3 V1/2. For the op amp, assume that Ri=1 MΩ, Ro= 10 kΩ, and av= 1,000. Calculate input resistance, output resistance, loop transmission, and closed-loop gain:

(a) Using the formulas from two-port analysis (Section 8.5).

(b) Using the formulas from return-ratio analysis (Section 8.8).

Fig. 8.58:

VDD Vị Ip V.

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Analysis and Design of Analog Integrated Circuits

ISBN: 978-0470245996

5th edition

Authors: Paul R. Gray, ‎ Paul J. Hurst Stephen H. Lewis, ‎ Robert G. Meyer

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