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ŠOTNER, R. HERENCSÁR, N. JEŘÁBEK, J. LANGHAMMER, L. POLÁK, J.
Originální název
On practical construction of electronically controllable compact current amplifier based on commercially available elements and its application
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
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 and the selected solutions verified by PSpice simulations and, moreover, also by lab experiments. Saving one discrete active device in comparison to already known similar topologies of single-input and single-output version (CA-SISO) is significant benefit whereas all other qualitative features remain very similar to previously reported ones. Simple modification of CA concept to multiple-output version (CA-SIMO), having independent adjustable current gain in each of output branches, is easily available. Experimental tests of features of discussed concepts yield adjustability range of input resistance from 100 to more than 10 k and current gain adjusting from 0.1 to 3.5 with bandwidth (-3 dB) of CA transfer response up to 16 MHz. As an example of application, proposed CA was successfully implemented in quadrature oscillator with a very wide tunability range from 29 kHz to 4.94 MHz. It was achieved by electronic control of several adjustable parameters of proposed CA.
Klíčová slova
Adjustable current gain, adjustable resistance of current input terminal, current amplifier, quadrature oscillators, tunability range extension.
Autoři
ŠOTNER, R.; HERENCSÁR, N.; JEŘÁBEK, J.; LANGHAMMER, L.; POLÁK, J.
Vydáno
14. 7. 2017
Nakladatel
Elsevier
ISSN
1434-8411
Periodikum
AEU - International Journal of Electronics and Communications
Ročník
81
Číslo
11/2017
Stát
Spolková republika Německo
Strany od
56
Strany do
66
Strany počet
11
URL
http://www.sciencedirect.com/science/article/pii/S143484111731052X
BibTex
@article{BUT137800, author="Roman {Šotner} and Norbert {Herencsár} and Jan {Jeřábek} and Lukáš {Langhammer} and Josef {Polák}", title="On practical construction of electronically controllable compact current amplifier based on commercially available elements and its application", journal="AEU - International Journal of Electronics and Communications", year="2017", volume="81", number="11/2017", pages="56--66", doi="10.1016/j.aeue.2017.07.002", issn="1434-8411", url="http://www.sciencedirect.com/science/article/pii/S143484111731052X" }