Publication detail

Electronic Tunability and Cancellation of Serial Losses in Wire Coils

ŠOTNER, R. JEŘÁBEK, J. POLÁK, L. THEUMER, R. LANGHAMMER, L.

Original Title

Electronic Tunability and Cancellation of Serial Losses in Wire Coils

Type

journal article in Web of Science

Language

English

Original Abstract

This work presents a novel methodology to adjust the inductance of real coils (electronically) and to cancel out serial losses (up to tens or even hundreds of Ohms in practice) electronically. This is important in various fields of electromagnetic sensors (inductive sensors), energy harvesting, measurement and especially in the instrumentation of various devices. State-of-the-art methods do not solve the problem of cancellation of real serial resistance, which is the most important parasitic feature in low- and middle-frequency bands. In this case, the employment of serial negative resistance is not possible due to stability issues. To solve this issue, two solutions allowing the cancellation of serial resistance by the value of the passive element and an electronically adjustable parameter are introduced. The operational ranges are between 0.1 and 1 mH and 0.1 and 10 mH, valid in bandwidths from hundreds of Hz up to hundreds of kHz. The proposed concepts are experimentally tested in two applications: an electronically tunable oscillator of LC type and an electronically tunable band-pass RLC filter. The presented methodology offers significant improvements in the process of circuit design employing inductors and can be beneficially used for on-chip design, where serial resistance issues can be very significant.

Keywords

active filter; current conveyor; electronic adjustment; inductance simulator; loss cancellation; oscillator; variable gain amplifier

Authors

ŠOTNER, R.; JEŘÁBEK, J.; POLÁK, L.; THEUMER, R.; LANGHAMMER, L.

Released

28. 9. 2022

Publisher

MDPI

Location

Switzerland

ISBN

1424-8220

Periodical

SENSORS

Year of study

22

Number

19

State

Swiss Confederation

Pages from

1

Pages to

16

Pages count

16

URL

https://www.mdpi.com/1424-8220/22/19/7373

Full text in the Digital Library

http://hdl.handle.net/11012/208458

BibTex

@article{BUT179326,
  author="Roman {Šotner} and Jan {Jeřábek} and Ladislav {Polák} and Radek {Theumer} and Lukáš {Langhammer}",
  title="Electronic Tunability and Cancellation of Serial Losses in Wire Coils",
  journal="SENSORS",
  year="2022",
  volume="22",
  number="19",
  pages="1--16",
  doi="10.3390/s22197373",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/22/19/7373"
}