diplomsko delo
Luka Kavčič (Author), Andrej Žemva (Mentor)

Abstract

Pri izdelavi ali popravilu elektronskih izdelkov primerna merilna in testna oprema lahko prihrani veliko ur, pogosto pa brez nje ni mogoče rešiti nepričakovanih težav. Problem je, da so naprave, kot je osciloskop ali signalni generator, pogosto predrage za študente ali amaterje. Pri signalnih generatorjih je problem tudi, da imajo zelo majhne izhodne tokove in visoko notranjo upornost 50 Ohmov. Zato je potrebno izhod signalnega generatorja meriti z osciloskopom, kar pri dvokanalnih osciloskopih vzame možnost istočasnega merjenja večih vozlišč. Cilj te naloge je narediti nizkocenovni signalni generator z majhno izhodno impedanco in veliko izhodno močjo. Frekvenca vzorčenja je 6 milijonov vzorcev na sekundo, zato je največja izhodna frekvenca omejena na 1 MHz. Največja izhodna napetost je ±13 V. Največji tok je omejen z napajanjem na 333 mA. Generator lahko sešteje 6 funkcij, med katerimi je tudi šum in dodajanje enosmerne komponente signalu. Upravlja se ga s 3,5 palčnim ekranom na dotik, kjer lahko izbiramo funkcije in nastavimo njihove parametre. Na ekranu je narisan graf za lažjo predstavo izhodnega signala. Vezje vključuje rele, ki omogoča postavitev izhoda na visoko impedančno stanje. Za boljšo kompatibilnost z laboratorijsko opremo je dodan tudi 50 Ohmski izhod z BNC priključkom.

Keywords

signalni generatorji;mikrokrmilniki;impedančni pretvorniki;univerzitetni študij;Elektrotehnika;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FE - Faculty of Electrical Engineering
Publisher: [L. Kavčič]
UDC: 621.3(043.2)
COBISS: 120573955 Link will open in a new window
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Downloads: 15
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Other data

Secondary language: English
Secondary title: Design of signal generator based on STM32G061 microcontroller
Secondary abstract: When making or repairing electronic devices we can be much more efficient with proper measuring and testing equipment. We are often unable to solve unexpected problems without it. The problem is that devices like oscilloscope or signal generator can often be too expensive for students or amateurs. Signal generators usually have very low output current and high internal resistance of 50 Ω. That can be quite a problem with dual channel oscilloscopes since one channel is used to measure the output of our signal generator, making us unable to concurrently measure more than one node. The goal was to make a low-cost signal generator with small output impedance and large output power. Sample frequency was 6 MSps, limiting the output frequency to 1 MHz. Output voltage swing is ±13 V. Output current is limited to 333 mA. The generator can add up to 6 functions, including noise and DC offset. It is controlled by 3.5-inch touch screen, where we can choose desired functions and set their parameters. The screen contains a graph for easier representation of the output signal. The circuit contains a relay, used for high impedance output. For better compatibility with lab equipment, 50 Ω output with BNC connector is used.
Secondary keywords: signal generator;microprocessor;impedance converter;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000313
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za elektrotehniko
Pages: XVI, 40 str.
ID: 16391549