AF100 Datasheet | National Semiconductor

~National ~ Semiconductor ~ Active Filters 'TI oo-L AF100 Universal Active Filter General Description The AF100 state variable active filter is a general second order lumped RC network. Only four external resistors program the AF100 for specific second order functions. Lowpass, high pass, and bandpass functions are available simultaneously at separate outputs. Notch and allpass functions are available by summing the outputs in the unmitted output summing amplifier. Higher order systems are realized by cascading AF 100 active filters with appropriate programming resistors. Any of the classical filter configurations, such as Butterworth, Bessel, Cauer, and Chebyshev can be...