Projektiranje i karakterizacija naponski upravljanog oscilatora

undergraduate thesis

• Title (english): Design and characterization of a voltage controlled oscillator
• Author: Juraj Grabovac
• Mentor: Adrijan Barić (mentor)
• Committee member: Adrijan Barić (predsjednik povjerenstva)
• Committee member: Josip Bačmaga (član povjerenstva)
• Committee member: Hrvoje Štimac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2018-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Ovaj završni rad opisuje način na koji je projektiran sustav na dvije dvostrane tiskane pločice za dobivanje naponski upravljanog oscilatora koji daje velike radio frekvencije na svom izlazu.
Kako bi sustav radio bilo je potrebno napraviti sljedeće stvari:
Komunikacija sa računalom ostvaruje se preko USB sučelja koristeći mikrokontroler PIC16F1459. Komunikacija između mikrokontrolera i digitalno analognog pretvornika ostvaruje se preko SPI veze. Mikrokontroler i digitalno analogni pretvornik služe za podešavanje razine napona upravljanja. Podešeni napon se koristi kao napon za upravljanje radom oscilatora HMC509LP5 tako što se mijenjajući napon pomoću mikrokontrolera i digitalno analognog pretvornika dobivaju različite frekvencije na izlazu iz oscilatora.
Korištenjem regulatora napona osigurano je potrebno napajanje za digitalne sklopove.
Nakon što je sustav osposobljen da radi izvršena su mjerenja koristeći spektralni analizator i određene karakteristike naponski upravljanog oscilatora za različite razine napona upravljanja odnosno određena je karakteristika frekvencije izlaznog signala iz oscilatora i karakteristika izlazne snage signala iz oscilatora u ovisnosti o naponu upravljanja.

Abstract (english)

This final assignment describes designing the system on two double-sided printed circuit boards for obtaining a voltage controlled oscillator that provides high radio frequency at the output.
To make the system work it was necessary to do the following things:
Communication with computer is provided by USB interface using the microcontroller PIC16F1459. Communication between the microcontroller and the digital to analog converter is provided by the SPI connection. A microcontroller and a digital to analog converter are used to adjust the control voltage level. The set voltage is used as a tune voltage to control the operation of the HMC509LP5 oscillator so that varying the voltage with microcontroller and analog to digital converter we obtain different frequencies at the output from the oscillator.
The necessary power supply for the digital circuits is provided by using the voltage reugulator.
After the system was enabled, the measurements were made using a spectral analyzer and the characteristics of the voltage controlled oscillator were determined for different levels of control voltage. The frequency of the output oscillator signal and the power of the output signal from the oscillator were determined in dependence on the control voltage.

• Keywords: Naponski upravljani oscilator; digitalno analogni pretvornik; mikrokontroler; tiskana pločica; radio frekvencija; analizator spektra
• Keywords (english): Voltage control output; Digital to analog converter; Microcontroller; Printed circuit board; Radio frequency; Spectrum analyzer
• Language: croatian
• URN:NBN: urn:nbn:hr:168:524052
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-13 20:32:21