Pure Current-Mode Frequency Filter for Signal Processing in High-Speed Data Communication

Although the amount of equipment working in digital form is growing, it is still necessary to use analog circuits as an interface between the real world and the digitized one. Because the frequency of processed signals in the digital part increases constantly, the analog part must also be able to work in higher frequency bands. In this paper circuits working in the current-mode are described, which fulfill the conditions of new telecommunication technologies. A third-order low-pass frequency filter is described, which can be used for signal processing in industrial data networks or data buses working in the current-mode developed for automotive industry or for medical equipment.