(TIV200) Calculator program evaluates elliptic filters

11092019, 12:13 PM
Post: #1




(TIV200) Calculator program evaluates elliptic filters
"Calculator program evaluates elliptic filters
Many designers consider the elliptictransfer function to be the most useful of all analogfiltering functions, because of its steep rolloff at the band edges. You can use a Texas Instruments model V200 Voyage programmable calculator and the program in Listing 1 to evaluate a lowpass elliptic filter by finding its characteristic's poles and zeros. To do so, this program implements Darlington's algorithm (Reference 1). The program accepts as input the filter's maximum passbandattenuation ripple in decibels, its stopband and passband frequencies in radians per second, and its order, or number of poles (Figure 1). As an example, calculate the zeros, poles, and stopband attenuation of an elliptic, fifthorder, analog lowpass filter with maximum gain of 0.1 dB and stopband frequency of 1.05 radians/sec. Figure 2 illustrates the calculator's display screens during program execution." Follow the Links. BEST! SlideRule 

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