摘要：使用设计的Sallen-Key滤波器时，元件数量少，金钱，和电路板空间。简化与带通滤波器固定增益amplfiers的。Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS Keywords: low pass filters, high pass filters, filter designs, op amps as filters, Sallen-Key filter Jan 22, 2001 APPLICATION NOTE 700 Fixed-Gain Op Amps Simplify Filter Design Abstract: Use less component count, money, and board space when designing Sallen-Key filters. Simplify band pass filters with fixed gain amplfiers. Simple second-order filters meet many filtering requirements. A low-order low-pass filter, for example, is often adequate for antialiasing in ADC applications or for eliminating high-frequency noise in audio applications. Similarly, a low-order high-pass filter can easily remove power-supply noise. When you design such filters with built-in gain, fixed- gain op amps can save space, cost, and time. Figur……