摘要：通过钻研Sallen-Key滤波器的元件灵敏度更深入一点，我们发现在数学分析“甜蜜点” ，使简单的，单一的运算放大器，过滤器，其性能的竞争对手，更复杂的过滤器，设计。在延长的Sallen-Key滤波器的效用，这种做法是有益的。Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS AUDIO CIRCUITS FILTER CIRCUITS (ANALOG) Keywords: op amp filters, Sallen-Key filters, high pass filter, opamps, single op amp Mar 21, 2001 APPLICATION NOTE 738 Minimizing Component-Variation Sensitivity in Single Op Amp Filters Abstract: By delving a little more deeply into the Sallen-Key filter's component sensitivities, we discover a "sweet spot" in the mathematical analysis that allows the design of simple, single op amp filters whose performance rivals that of more complicated filters. This approach has been useful in extending the utility of Sallen-Key filters. Dozens of filter topologies have been devised over the years, each with its own advantages. Yet engineers often rely on a small but popular……