Detail publikace
Differentiator circuits with scalable and electronically adjustable time constant and their application in phase shift evaluation
ŠOTNER, R. POLÁK, L. PETRŽELA, J. SEMENOV, D. LANGHAMMER, L. JAIKLA, W.
Originální název
Differentiator circuits with scalable and electronically adjustable time constant and their application in phase shift evaluation
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Two novel scalable and electronically adjustable differentiator designs are presented in this paper. These designs are based on special variable gain amplifiers extending well-known concept of standard single operational amplifier-based differentiators. The key novelty lies in their scalability, which allows for an enhanced time constant value by adjusting the ratio of resistors. Simultaneously, the special form of gain control using a DC voltage offers wide electronic tunability. The solution performs high input and low output impedance, both independent of frequency. Experimental testing demonstrated time constant adjustments in two configurations: from 64 ns to 4.5 mu s (a ratio of maximal and minimal value 70) and from 8.7 mu s to 183 mu s (a ratio of 21). As an application example, the proposed differentiator is utilized in the design of a readout system for an absolute phase shift difference to pulse width ratio converter, suitable for monitoring a very slow phenomenon such biosignals.
Klíčová slova
Differentiator; Electronic adjustment; Operational amplifier; Scaling; Phase shift measurement; Time constant; Variable gain amplifier
Autoři
ŠOTNER, R.; POLÁK, L.; PETRŽELA, J.; SEMENOV, D.; LANGHAMMER, L.; JAIKLA, W.
Vydáno
3. 5. 2025
Nakladatel
ELSEVIER
Místo
AMSTERDAM
ISSN
2090-4495
Periodikum
Ain Shams Engineering Journal
Ročník
16
Číslo
9
Stát
Egyptská arabská republika
Strany od
1
Strany do
12
Strany počet
12
URL
BibTex
@article{BUT198146,
author="Roman {Šotner} and Ladislav {Polák} and Jiří {Petržela} and Dmitrii {Semenov} and Lukáš {Langhammer} and Winai {Jaikla}",
title="Differentiator circuits with scalable and electronically adjustable time constant and their application in phase shift evaluation",
journal="Ain Shams Engineering Journal",
year="2025",
volume="16",
number="9",
pages="1--12",
doi="10.1016/j.asej.2025.103489",
issn="2090-4495",
url="https://www.sciencedirect.com/science/article/pii/S2090447925002308"
}