16.8. Practical Design Hints
This section introduces DC-biasing techniques for filter designs in single-supply applications, which are usually not required when operating with dual supplies. It also provides recommendations on selecting the type and value range of capacitors and resistors as well as the decision criteria for choosing the correct op amp.
16.8.1. Filter Circuit Biasing
The filter diagrams in this chapter are drawn for dual supply applications. The op amp operates from a positive and a negative supply, while the input and the output voltage are referenced to ground (Fig. 16.46).
For the single supply circuit in Fig. 16.47, the lowest supply voltage is ground. For a symmetrical output signal, the potential of the noninverting input is ...
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