Transcription of Introduction to Switched-Capacitor Circuits
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Introduction to Switched-Capacitor Circuits
12 Introduction to Switched-CapacitorCircuitsOur study of amplifiers in previous chapters has dealt with only cases where the input signal iscontinuously available and applied to the circuit and the output signal is continuously continuous-time Circuits , such amplifiers find wide application in audio, video, and high-speed analog systems. In many situations, however, we may sense the input only at periodic instantsof time, ignoring its value at other times. The circuit then processes each sample, producing avalid output at the end of each period. Such Circuits are called discrete-time or sampled-data this chapter, we study a common class of discrete-time systems called Switched-Capacitor (SC) Circuits . Our objective is to provide the foundation for more advanced topics such as filters,comparators, ADCs, and DACs.
Chapter 12. Introduction to Switched-Capacitor Circuits 399 considerably from one phase to another, as seen in Fig. 12.5(a) and (b), raising concern about its stability. What is the advantage of the amplifier of Fig. 12.4 over that in Fig. 12.1? In addition to sampling capability, we note from the waveforms depicted in Fig. 12.5 that after V out
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