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Master's Thesis
Author of thesis: Ing. Šimon Podolák
Acad. year: 2025/2026
Supervisor: Ing. Roman Prokop, Ph.D.
Reviewer: doc. Ing. Vilém Kledrowetz, Ph.D.
This master’s thesis deals with the design of a low-power CMOS operational amplifier with a Rail-to-Rail input, output, and transconductance compensation. The theoretical part describes the basic parameters of operational amplifiers, the architecture of Rail-to-Rail input and output stages, and the issue of transconductance variation in complementary input structures with PMOS and NMOS differential pairs. Furthermore, selected methods for constant transconductance compensation are described and compared. The practical part focuses on the design of a Rail-to-Rail operational amplifier implemented in Onsemi 65 nm technology for a supply voltage range of 1.7–3.3 V. The thesis also includes the design of individual amplifier blocks and simulation-based verification of the proposed circuit. Finally, the achieved results are evaluated.
CMOS operational amplifier, Rail-to-Rail architecture, low power consumption, transconductance, constant transconductance compensation, differential input stage, low-voltage design
Date of defence
09.06.2026
Result of the defence
Defended (thesis was successfully defended)
Grading
B
Process of defence
Student seznámil státní zkušební komisi s řešením své diplomové práce a zodpověděl otázky a připomínky oponenta. Dále odpověděl na otázky komise: Měli jste v zadání parametry jako šířka pásma, šum a pod? Student uvedl, že se orientoval podle typické hodnoty. Proč je šířka pásma taká nízká? Student uvedl, že se jednalo o zadání vedoucího.
Language of thesis
Czech
Faculty
Fakulta elektrotechniky a komunikačních technologií
Department
Department of Microelectronics
Study programme
Microelectronics (MPC-MEL)
Composition of Committee
doc. Ing. Lukáš Fujcik, Ph.D. (předseda) doc. Ing. Vilém Kledrowetz, Ph.D. (místopředseda) doc. Ing. Ivan Szendiuch, CSc. (člen) doc. Ing. Jaroslav Kováč, Ph.D. (člen) Ing. Břetislav Mikel, Ph.D. (člen) prof. Ing. Jaroslav Boušek, CSc. (člen)
Supervisor’s reportIng. Roman Prokop, Ph.D.
Grade proposed by supervisor: A
Reviewer’s reportdoc. Ing. Vilém Kledrowetz, Ph.D.
Grade proposed by reviewer: B
Responsibility: Mgr. et Mgr. Hana Odstrčilová