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.
bias point. resistor as in Fig. 12.2(b), providing dc feedback while negligibly affecting the ac behavior of the amplifier in the frequency band of interest. Such an arrangement is indeed practical if the circuit senses only high-frequency signals. But suppose, for example, the circuit is to amplify a voltage
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