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undergraduate thesis
Strujna zrcala temeljena na NMOS i PMOS tranzistorima
2021. urn:nbn:hr:200:923679
Guzmić, Ana
Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Department of Communications
Chair of Electronics and Microelectronics

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Guzmić, A. (2021). Strujna zrcala temeljena na NMOS i PMOS tranzistorima (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek. Retrieved from https://urn.nsk.hr/urn:nbn:hr:200:923679

Guzmić, Ana. "Strujna zrcala temeljena na NMOS i PMOS tranzistorima." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2021. https://urn.nsk.hr/urn:nbn:hr:200:923679

Guzmić, Ana. "Strujna zrcala temeljena na NMOS i PMOS tranzistorima." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2021. https://urn.nsk.hr/urn:nbn:hr:200:923679

Guzmić, A. (2021). 'Strujna zrcala temeljena na NMOS i PMOS tranzistorima', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 10 December 2024, https://urn.nsk.hr/urn:nbn:hr:200:923679

Guzmić A. Strujna zrcala temeljena na NMOS i PMOS tranzistorima [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2021 [cited 2024 December 10] Available at: https://urn.nsk.hr/urn:nbn:hr:200:923679

A. Guzmić, "Strujna zrcala temeljena na NMOS i PMOS tranzistorima", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:200:923679

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Metadata
TitleStrujna zrcala temeljena na NMOS i PMOS tranzistorima
Title (english)NMOS and PMOS based current mirrors
AuthorAna Guzmić
MentorTomislav Matić (mentor)
Committee memberTomislav Matić (predsjednik povjerenstva)
Committee memberGoran Knežević (član povjerenstva)
Committee memberDavor Vinko (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
(Department of Communications)
(Chair of Electronics and Microelectronics)
Osijek
Defense date and country2021-09-08, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Electronics
Abstract
Strujna zrcala predstavljaju jedan od osnovnih dijelova integriranih sklopova. Kao što im sam naziv govori, ona zrcale referentnu struju u druge dijelove sklopa i tako pojednostavljuju njegovu strukturu jer zamjenjuju više različitih strujnih izvora. Rad im je temeljen na načelu da će kroz dva geometrijski jednaka tranzistora pri istim temperaturama, pod uvjetom da su u aktivnom modu, teći jednaka struja. Ovisno o potrebama, postoje različite implementacije strujnog zrcala. Jednostavno se strujno zrcalo sastoji od dva tranzistora u diodnom spoju koji omogućava da naponi 𝑈𝐺𝑆 na ulaznom i izlaznom tranzistoru budu jednaki što je preduvjet za repliciranje struje na izlazu. Prednost kaskodnog strujnog zrcala je u tome da neutralizira utjecaj modulacije duljine kanala. Widlarovo strujno zrcalo omogućava dobitak izlaznih struja u mikroamperskom području bez korištenja velikih otpora. Najveća prednost Wilsonova strujnog zrcala je u velikom izlaznom otporu čime dobivamo zrcaljenu struju koja je manje ovisna o izlaznom naponu strujnog zrcala. Osim opisa, prikazane sheme i matematičke interpretacije svakog od spomenutih tipova strujnih zrcala, u ovom radu izrađene su i simulacije u programu LTSpice gdje je promatran utjecaj proizvoljno odabranih struja i parametara tranzistora na strujno pojačanje. Simulacijama Widlarovog i Wilsonovog strujnog zrcala ispitano vrijede li relacije napisane u prethodnim poglavljima u simuliranim uvjetima te su dobiveni rezultati uspoređeni s izračunatim.
Abstract (english)
Current mirrors are one of the most important components of integrated circuits. As their name suggests, they reflect the input current and carry it to other parts of the circuit which simplifies it’s architecture. Their function is based on a premiss that the same current flows through two geometrically same transistors if they are operating at the same temperatures. There are different implementations to the current mirrors, depending on customer’s needs. For example, the simple MOSFET current mirror is made up of two transistors in diode connection which enables the 𝑈𝐺𝑆 voltages to have the same values in the input and in the output. The cascode MOSFET current mirror has the ability to neutralize the channel length modulation. Widlar current mirror enables generating small values of the output current without usage of large resistor values. Wilson current mirror has very large output resistance which makes the reflecting current less dependant on output voltage. In this final paper it is tried to describe several types of current mirrors in words and mathematically. Also, six simulations are given to help understand the influence of randomly selected currents and dimensions of transistors on current gain. Simulations of Widlar and Wilson current mirrors are used to question if equations written in previous chapters are valid in simulated conditions. Results are compared to the calculated ones. Key words: saturation, current mirror, referent current, output current, reflection coefficient, output resistance, output voltage, Widlar’s current mirror, Wilson’s current mirror
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:200:923679
Study programmeTitle: Undergraduate University Study Programme; specializations in: Electrical Engineering, Information and Communication Technologies
Course: Electrical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica inženjer/inženjerka elektrotehnike i informacijske tehnologije (sveučilišni/a prvostupnik/prvostupnica inženjer/inženjerka elektrotehnike i informacijske tehnologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2024-09-04 08:49:24