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Some aspects of band‐pass filter design pertaining to amplifier imperfections and mass production
Author(s) -
Zeheb Ezra
Publication year - 1975
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490030304
Subject(s) - filter (signal processing) , control theory (sociology) , amplifier , all pass filter , cascade , active filter , realization (probability) , filter design , butterworth filter , low pass filter , m derived filter , electronic engineering , high pass filter , engineering , computer science , mathematics , electrical engineering , voltage , statistics , control (management) , cmos , artificial intelligence , chemical engineering
A multiple feedback single amplifier realization of a second order band‐pass filter is considered, with certain assumptions made on the amplifier imperfections. The required component values are derived explicitly in terms of the desired filter parameters, the amplifier's open loop finite gain and a degree‐of‐freedom. The feasible range of the degree‐of‐freedom is derived. It is then used to either minimize variations of filter parameters due to changes in passive and active components (assuming properties pertaining to hybrid technology components), or minimize the variance of the filter parameters relative variations, in order that all mass produced filter sections of the same type will be similar to each other. For the first case, some useful observations are made concerning the behaviour of the filter under environmental changes, and the allocation of gain to various sections of a cascade filter. Experimental results are reported and compared to anticipated ones.