By Peter B. Aronhime, F.W. Stephenson
Analog sign Processing brings jointly in a single position vital contributions and cutting-edge learn leads to this quickly advancing region.
Analog sign Processing serves as an exceptional reference, supplying perception into one of the most vital concerns within the box.
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Extra info for Analog Signal Processing
__--J'------1 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Frequency (Hz) Fig. 6. 7th-order ladder filter with a ± 19& random component tolerance. 2 Gain _ 0 4 dB . 8 -1 ~---'--~~~--~--~~-----'------~ 0 1000 2000 3000 Frequency (Hz) 4000 5000 6000 Fig. 7. Distortion of passband response of a 5th-order chebyshev ladder filter. The macromodels used for this are shown in figure 8. Bottom-plate stray-capacitance was calculated as the typical process value for polyl to substrate, plus an approximate interconnection capacitance, caleulated from process value for metall to substrate of minimum width and length equal to the capacitor perimeter.
Very high sensitivities to component error are likely to result and, since component tolerances are inevitable in silicon realization, the frequency response produced by the filter may deviate unacceptably from that required by the specification. 1 - 1% for ratio accuracy. 06% for ratio accuracy. To illustrate the sensitivity of a biquad filter to component tolerances, a series of simulations were carried out where the netlisting routine introduced a variation in component values. 1% across all the passive circuit components.
955232 The values for the passive components of the filter were as shown in table 1 for the biquad sections and table 2 for the first-order section. It must be noted that the precision of these figures would be restricted by the limitations of the fabrication process leading to additional tolerance effects. Figure 4 illustrates the effect of this ± 1% tolerance range on the biquad-based design. The results show a marked deviation, particularly in the vicinity of the high frequency (high-Q) pole.