Signal Processing Circuits
Most of the circuits presented in this chapter serve to condition analog signals for subsequent input to another circuit. Many of them could be categorized as wave-shaping or conditioning circuits. We will, for example, examine circuits that can rectify low amplitude signals, limit the maximum excursion of signals, and change the DC level of waveforms. Many of the circuits are quite simple in terms of component count, but they play important roles in overall systems design.
7.1 THE IDEAL DIODE
Several of these circuits behave as though they had perfect or ideal diodes. Figure 7.1 contrasts the forward-biased characteristics of a perfect diode with that of a typical silicon diode.
FIGURE 7.1 Comparison ...