CHAPTER 8

Audiofrequency Amplifier Design

This chapter is devoted to simplified design with audiofrequency (AF) ICs. Although such ICs are used primarily for consumer electronics, they can be adapted to any application where a number of AF amplifier functions are available in a single IC. Also note that the ICs discussed here are not necessarily limited to AF operation.

8.1 Low-Distortion Wideband Power Op-Amp

Figures 8-1 and 8-2 show the circuit schematic and performance characteristics, respectively, for a classic power op-amp (the National Semiconductor LH0101). This device has a gain bandwidth of 4 MHz and an output current of 2 A, and includes circuits to eliminate the crossover distortion discussed in Section 1.7.3. This IC has long been ...

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