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The Design of CMOS Radio-Frequency Integrated Circuits, Second Edition by Thomas H. Lee

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CHAPTER FOURTEENFEEDBACK SYSTEMS

14.1 INTRODUCTION

A solid understanding of feedback is critical to good circuit design, yet many practicing engineers have at best a tenuous grasp of the subject. This chapter is an overview of the foundations of classical control theory – that is, the study of feedback in single-input, single-output, time-invariant, linear continuous-time systems. We’ll see how to apply this knowledge to the design of oscillators, highly linear broadband amplifiers, and phase-locked loops, among other examples. We’ll also see how to extend our design intuition to include many nonlinear systems of practical interest.

As usual, we’ll start with a little history to put this subject in its proper context.

14.2 A BRIEF HISTORY OF ...

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