Analog variable frequency filters require the use of variable passive components. The higher the slope of the filter, the greater the number of needed variable passive components. These elements are ...
The circuit in Figure 1 matches an antialiasing filter's cutoff frequency to an ADC's changing conversion rate. Two main design requirements are high efficiency and the ability to convert signals with ...
In the last edition of Don’t Fear the Filter, we built up two examples of the simplest and most-used active filter of all time: the two-pole Sallen-Key lowpass. This time, we’re going to put two of ...
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