LMF60 High Performance 6th-Order Switched Capacitor Butterworth Lowpass Filter May 1996 LMF60 High Performance 6th-Order Switched Capacitor Butterworth Lowpass Filter General Description The LMF60 is a high performance precision 6th-order Butterworth lowpass active filter It is fabricated using National’s LMCMOS process an improved silicon-gate CMOS process specifically designed for analog products Switchedcapacitor techniques eliminate external component requirements and allow a clock-tunable cutoff frequency The ratio of the clock frequency to the low-pass cutoff frequency is internally set to 50 1 (LMF60-50) or 100 1 (LMF60-100) A Schmitt trigger clock input stage allows two clocking op...

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