Projektiranje sklopa za upravljanje napajanja autonomnih senzorskih čvorova u 350 nm CMOS tehnologiji

master's thesis

• Title (english): Design of power management circuit for autonomous sensor nodes in 350 nm CMOS technology
• Author: Filip Mikulić
• Mentor: Marko Koričić (mentor)
• Committee member: Marko Koričić (predsjednik povjerenstva)
• Committee member: Adrijan Barić (član povjerenstva)
• Committee member: Igor Krois (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2020-07-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom radu projektiran je sklop za upravljanje napajanja autonomnih senzorskih čvorova u 350 nm CMOS tehnologiji. Sklop za prikupljanje energije sastoji se od nabojske pumpe i skladišnog kondenzatora za pohranu energije. Napon na skladišnom kondenzatoru mjeri sklop za upravljanje napajanjem te uključuje i isključuje opterećenje. Sklop je realiziran korištenjem dvostupanjskog operacijskog pojačala, sklopa za mjerenje izlaznog napona i referentnog naponskog izvora. Potrošnja komparatora iznosi 150 nA. Projektirani referentni naponski izvor daje temperaturno neovisni napon iznosa 900 mV uz potrošnju 120 nA. Pošto se napon na skladišnom kondenzatoru mijenja u širokim granicama projektiran je linearni naponski regulator (LDO) koji koristi spomenuti referentni napon i operacijsko pojačalo s negativnom povratnom vezom. LDO daje stabilan napon iznosa 1.8 V uz maksimalnu izlaznu struju 100 μA i potrošnju neopterećenog izlaza iznosa 300 nA. Ukupna potrošnja neopterećenog sklopa za napajanje senzorskog čvora iznosi 600 nA što daje ukupnu prosječnu potrošnju 1.8 μW. U ovom radu se napon na skladišnom kondenzatoru regulirao između 3.6 V i 2.4 V, a regulator s malim propadom napona je generirao istosmjerni napon od približno 1.8 V.

Abstract (english)

In this thesis design of power management system for autonomous sensor tags in 350 nm CMOS technology is presented. Energy harvesting system consists of charge pump and storage capacitor used as energy container. Voltage across storage capacitor is being measured by power management system which connects and disconnects load depending on the voltage level. Power management system consists of two-stage operational amplifier, voltage divider and voltage reference. Power management system consumes 150 nA of current. Voltage reference is generating temperature independent voltage of 900 mV with 120 nA consumption. Since voltage across storage capacitor has large variations, LDO regulator, which also uses voltage reference, along with operational amplifier with negative feedback is used. LDO is generating stable voltage of 1.8 V with maximum load current of 100 μA, while consuming 300 nA current without the load. Total current consumption of power management circuit without the load is 600 nA which produces total dissipation of 1.8 μW. In this thesis voltage over storage capacitor is being regulated between 2.4 V and 3.6 V, and low drop-out regulator generates fixed voltage of 1.8 V.

• Keywords: rfid; cmos; ispravljač; nabojska pumpa; komparator; naponsko djelilo; izvor referentnog napona; linearni naponski regulator; pojačalo s povratnom vezom
• Keywords (english): rfid; cmos; rectifier; charge pump; comparator; voltage divider; voltage reference; linear voltage regulator; feedback amplifier
• Language: croatian
• URN:NBN: urn:nbn:hr:168:133717
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 13:09:50