Model kontinuiranog aktivnog filtra za programirljive analogne sklopove

scientific master's theses

• Title (english): Continuous Active Filter Model for Programmable Analog Circuits
• Author: Ivica Mihalić
• Mentor: Neven Mijat (mentor)
• Committee member: Dražen Jurišić (predsjednik povjerenstva)
• Committee member: Neven Mijat (član povjerenstva)
• Committee member: Nino Stojković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Electronic Systems and Information Processing); Zagreb
• Defense date and country: 2011-12-14, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

U ovom radu razvijen je model aktivnog filtra za programirljive analogne sklopove kojim je moguće ostvariti razne filtarske topologije. Odabrana realizacija temelji se na OTA-C (gm-C) pojačalima, pošto ona za realizaciju pojedinih struktura te za simulaciju elemenata kao što su otpori i induktiviteti koristi samo OTA pojačala i kapacitete i kao takva je vrlo pogodna za realizaciju na integriranom krugu. Odabrani programirljivi analogni sklop za realizaciju filtarskih struktura je FPAA, tj. programirljivo analogno polje. Osnovni gradivni element FPAA je programirljivi analogni blok (CAB) kojeg čine složena strminska ćelija i programirljivi kapacitetni niz (PCA). Složena strminska ćelija sastoji se od paralelnog spoja četiri osnovne strminske ćelije od kojih je svaku moguće uključivati ili isključivati i na taj način se može mijenjati ukupna strmina. PCA se sastoji od paralelnog spoja više kapaciteta s binarno raspoređenim veličinama kapaciteta. Svaki od tih kapaciteta moguće je uključiti ili isključiti iz sklopa i na taj je način moguće mijenjati ukupni kapacitet PCA sklopa. Pored CAB-a važan element je lokalna te globalna prospojna mreža koja povezuje pojedine dijelove sklopa i ima funkciju usmjeravanja signala. Realizirane su neke od filtarskih struktura na programirljivom analognom polju. Napravljene su SPICE simulacije njihovih karakteristika te je analiziran utjecaj pojedinih elemenata FPAA na amplitudne i fazne frekvencijske karakterstike te na šum. Pokazano je da filtarske strukture nakon realizacije na programirljivom analognom polju zadovoljavaju tražene karakteristike.

Abstract (english)

In this work model of active filter for programmable analog circuits is developed. It allows us to realize various filter topologies. Chosen implementation is based on OTA-C amplifiers, because for realisation of different structures and for element simulation such as resistors and inductors, it uses only OTAs and capacitors and because of that it is very suitable for production on integrated chip. Chosen programmable circuit is based on field programmable analog array (FPAA). Element building block of FPAA is configurable analog block (CAB) which is composed of complex transconductance cell and programmable capacitor array (PCA). Complex transconductance cell is built as parallel connection of four basic transconductance cells and for each of them is possible to switch it on/off and in such way total transconductance can be varied. PCA is composed as parallel connection of capacitors with binary weighted values. Each of these capacitors can be switched on/off from circuit and so total capacitance can also be varied. Beside CAB, important FPAA element is local and global interconnection network which connects different circuit elements and has also the function of signal routing. Some of the filter structures are realised on FPAA. Their characteristics are simulated in SPICE, and also effect of certain FPAA elements on some circuit parameters, like it is noise, is analysed. It is demonstrated that each of filter structures that are realised on programmable analog array comply with requirements.

• Keywords: FPAA; CAB; OTA; gm; aktivni filtar; MOS; kaskadni dizajn; amplitudna karakteristika; šum
• Keywords (english): FPAA; CAB; OTA; gm; active filter; MOS; cascade design; amplitude characteristic; noise
• Language: croatian
• URN:NBN: urn:nbn:hr:168:436366
• Project: Number: 036-0362214-2316; Title: Sustavi analogne i mješovite obrade signala; Leader: Neven Mijat; Jurisdiction: Croatia; Funder: MZOS; Funding stream: ZP
• Study programme: Title: Postgraduate master programme in electrical engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
• Catalog URL: http://lib.fer.hr/cgi-bin/koha/opac-detail.pl?biblionumber=37870
• Type of resource: Text
• Extent: 151 str ; 30 cm
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-07-12 09:10:48