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We chose the LC Butterworth filter stage below in figure 9.
The amplified signal is then filtered using a high pass butterworth filter at 50MHz to diminish the baseline wandering and slow motion interference and a lowpass butterworth filter at 150Hz to diminish the EMG interference .
5-MHz Butterworth filter used as a digital-to-analog converter (DAC) reconstruction filter or an analog-to-digital converter (ADC) anti-aliasing filter to deliver higher quality analog video outputs or inputs.
The amplifiers incorporate a fifth-order Butterworth filter, which can be used as an encoder's digital-to-analog converter (DAC) reconstruction filter.
The DT9841-VIB Sleek Box supports the following software programmable IEPE functions for each of its eight analog inputs; --Current source - Enable or disable the use of a 4 mA current source --AC/DC coupling - Select whether AC coupling or DC coupling is used --Filtering - Enable or disable the use of the 2-pole, 10 kHz, Butterworth filter.
For example, there is an applet assisting with the design of a simple Butterworth Filter and one containing a reflectometer calculator.
The filter approximates the performance of a 4th order Butterworth filter with an optimization toward low overshoot and flat group delay.
As the foremost producer of Signal Averaged ECG (SAECG) products utilizing the patented bi-directional Butterworth filter, the company has received many requests from physicians throughout the world for this addition to our product line.