Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Josef Polak"'
Autor:
Roman Sotner, Jiri Petrzela, Jan Jerabek, Lukas Langhammer, Josef Polak, Winai Jaikla, Sunti Tuntrakool
Publikováno v:
Elektronika ir Elektrotechnika, Vol 26, Iss 2, Pp 42-47 (2020)
This paper introduces design of the linearly tunable quadrature voltage-controlled oscillator (VCO) using modern off-the-shelf active elements suitable for the design of electronically adjustable applications. The simplified topology was achieved usi
Externí odkaz:
https://doaj.org/article/f1d52458fd744c0991da7e0f14456c10
Autor:
Josef Polak
Publikováno v:
Journal of Competitiveness, Vol 11, Iss 3, Pp 109-127 (2019)
Certain risks associated with particular human activities cannot be eliminated, with commercial risks representing factors of business success or failure. In the current turbulent environment, proper risk assessment and management is of utmost import
Externí odkaz:
https://doaj.org/article/d007240e5dc24dc48d61cae1f9dd3b61
Publikováno v:
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems, Vol 4, Iss 1, Pp 1-7 (2015)
This article presents the digitally adjustable current amplifier (DACA) and its analog behavioral model (ABM), which is suitable for both ideal and advanced analyses of the function block using DACA as active element. There are four levels of this mo
Externí odkaz:
https://doaj.org/article/bc3c192f49644b289aa17d44976ec55b
Publikováno v:
Applied Sciences, Vol 7, Iss 1, p 106 (2017)
This paper presents a newly developed active device, referred to as a multiplied input differential difference amplifier (MIDDA), which allows operations of summation/subtraction and multiplication of input signals. It was designed and fabricated usi
Externí odkaz:
https://doaj.org/article/739868b2857840349f4b0247c8590be7
Autor:
Jiri Petrzela, Josef Polak, Roman Sotner, Jan Jerabek, Winai Jaikla, Sunti Tuntrakool, Lukas Langhammer
Publikováno v:
Elektronika ir Elektrotechnika, Vol 26, Iss 2, Pp 42-47 (2020)
Elektronika Ir Elektrotechnika. 2020, vol. 26, issue 2, p. 42-47.
Elektronika Ir Elektrotechnika. 2020, vol. 26, issue 2, p. 42-47.
This paper introduces design of the linearly tunable quadrature voltage-controlled oscillator (VCO) using modern off-the-shelf active elements suitable for the design of electronically adjustable applications. The simplified topology was achieved usi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e39280e427ab29a272cd30306588ac1b
http://eejournal.ktu.lt/index.php/elt/article/view/25903
http://eejournal.ktu.lt/index.php/elt/article/view/25903
Publikováno v:
Investment Management & Financial Innovations, Vol 20, Iss 4, Pp 416-433 (2023)
Food insecurity is not a new phenomenon even in leading European economies, but this complex problem area is facing new global challenges. This article traces the research gap in addressing food insecurity by focusing on the role of food retail chain
Externí odkaz:
https://doaj.org/article/0045742b609442d7b1db876bcaac2d36
Autor:
Algimantas Valinevicius, Jan Jerabek, Jaroslav Koton, Darius Andriukaitis, Lukas Langhammer, Josef Polak, Roman Sotner
Publikováno v:
TSP
This paper introduces new promising applications of VCA822 active device in the fractional-order design of two-ports including very simple and compact solutions of integrator, differentiator, low-pass and high-pass filter. Key feature of the designed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a093e9075fe310e86ee787635217a75f
https://doi.org/10.1109/tsp49548.2020.9163400
https://doi.org/10.1109/tsp49548.2020.9163400
Publikováno v:
AEU - International Journal of Electronics and Communications. 81:56-66
This paper presents a new concept of a current amplifier (CA) with electronically adjustable features (input resistance and current gain) implemented using commercially available devices. Several variations of basic structure are studied, described a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cd04840b07a7487903bd966249c8cdc
https://doi.org/10.1016/j.aeue.2017.07.002
https://doi.org/10.1016/j.aeue.2017.07.002
Publikováno v:
Advances in Electrical and Computer Engineering, Vol 16, Iss 3, Pp 43-48 (2016)
The paper presents proposal of the 2nd-order universal frequency filter. The presented filter operates in the current-mode and it is designed in the single-ended and fully-differential form. Signal-flow graphs (SFG) method has been used in the propos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c676ac370446d8a1e218d9e3d20d14d7
https://doaj.org/article/dac8a55f3f124a2e87159c5a4d686f34
https://doaj.org/article/dac8a55f3f124a2e87159c5a4d686f34
Publikováno v:
Journal of Electrical Engineering . 2016, vol. 67, issue 4, p. 261-266.
This paper presents the simulations results in comparison with the measured results of the practical realization of the multifunctional second order frequency filter with a Digitally Adjustable Current Amplifier (DACA) and two Dual-Output Controllabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b7b334123e8bcaa324b235e82ec4ef7
https://doi.org/10.1515/jee-2016-0038
https://doi.org/10.1515/jee-2016-0038