Drazen Jurisic

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The design procedure of low-sensitivity second-and third-order class-4 Sallen and Key active resistance-capacitance (RC) allpole filters, using impedance tapering, has already been published. There a ladder structure in the positive feedback loop of an operational amplifier was used. In this paper desensitization using impedance tapering is applied to(More)
In this paper a method of realizing seventh-order elliptic filter using signal-flow graphs is presented. The elliptic filter having a minimum number of capacitors is compared with the filter having a higher number of capacitors. The version with minimum number of capacitors provides area savings in IC form. Both filters (i.e. filter with minimum and one(More)
The design procedure of low-sensitivity, low-pass (LP) 2 nd-and 3 rd-order class-4 Sallen and Key active resistance-capacitance (RC) allpole filters, using impedance tapering, has already been published [1]. In this paper desensitization using impedance tapering is applied to HP and BP 2 nd-order filters. It is shown that HP filters have dual properties to(More)
— In this paper we introduce a new design procedure for low-sensitivity filter sections, which have a symmetrical passive-RC network in the operational amplifier (opamp) feedback loop. In the design procedure we apply impedance scaling to the symmetrical bridged-T and twin-T networks; they become "potentially symmetrical" [1]. The design of low-sensitivity(More)
— This paper presents an optimum tuning procedure for high-order low-pass (LP) elliptic filters. Since elliptic filters are often used to satisfy very tight specifications, they often need to be tuned accurately. In this paper, we describe the tuning of one biquad, the 'tuning biquad', in a cascade of biquads. It is shown by Matlab simulations that the best(More)
—In this paper a method of realizing elliptic filters using signal-flow graphs is presented. Elliptic filters having a minimum number of capacitors are compared with those having a higher number of capacitors. This number is particularly significant when comparing filters realized in balanced-to-ground and unbalanced form. The version with a canonic number(More)
One of the problems with on-chip active-RC filters is that in order to satisfy tight specifications accurately, they need to be fine-tuned. This becomes more difficult with increasing filter order. In this paper, we introduce a simplified tuning method which is obtained by a new structure consisting of a filter section of second- or third-order (Biquad or(More)
Despite the overwhelming trend of digitization of electronic systems, and many indisputable advantages of having digital signal processing compared to analog, hardware towards the real, outside world, is a part of the overall mixed system and remains mostly analog. This analog part, in most IC-system chips is well known as “analog-front-end”(More)