A high open-loop gain controller

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

A new controller, especially suited for phase‐locked loops, is discussed. The controller, composed of RC‐circuit electronics, has a gain with a slope of −30 dB/decade over a wide bandwidth. It is shown that in certain systems the present controller (PI3/2 controller) provides a much higher feedback gain than an ordinary proportional‐integrator controller (PI controller).
As applications, the superconducting quantum interference device (SQUID) and an electrically adjustable point contact used in surface microscopy or spectroscopy are discussed in some detail.
The operation of the controller in a piezo‐driven point contact was studied experimentally.
Original languageEnglish
Pages (from-to)2449-2451
JournalReview of Scientific Instruments
Volume61
Issue number9
DOIs
Publication statusPublished - 1990
MoE publication typeA1 Journal article-refereed

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controllers
Controllers
Point contacts
SQUIDs
Microscopic examination
Electronic equipment
Spectroscopy
slopes
microscopy
bandwidth
Feedback
Bandwidth
interference
electronics
spectroscopy

Cite this

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title = "A high open-loop gain controller",
abstract = "A new controller, especially suited for phase‐locked loops, is discussed. The controller, composed of RC‐circuit electronics, has a gain with a slope of −30 dB/decade over a wide bandwidth. It is shown that in certain systems the present controller (PI3/2 controller) provides a much higher feedback gain than an ordinary proportional‐integrator controller (PI controller). As applications, the superconducting quantum interference device (SQUID) and an electrically adjustable point contact used in surface microscopy or spectroscopy are discussed in some detail. The operation of the controller in a piezo‐driven point contact was studied experimentally.",
author = "Heikki Sepp{\"a} and Hannu Sipola",
note = "Project code: S{\"A}H1201",
year = "1990",
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language = "English",
volume = "61",
pages = "2449--2451",
journal = "Review of Scientific Instruments",
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}

A high open-loop gain controller. / Seppä, Heikki; Sipola, Hannu.

In: Review of Scientific Instruments, Vol. 61, No. 9, 1990, p. 2449-2451.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - A high open-loop gain controller

AU - Seppä, Heikki

AU - Sipola, Hannu

N1 - Project code: SÄH1201

PY - 1990

Y1 - 1990

N2 - A new controller, especially suited for phase‐locked loops, is discussed. The controller, composed of RC‐circuit electronics, has a gain with a slope of −30 dB/decade over a wide bandwidth. It is shown that in certain systems the present controller (PI3/2 controller) provides a much higher feedback gain than an ordinary proportional‐integrator controller (PI controller). As applications, the superconducting quantum interference device (SQUID) and an electrically adjustable point contact used in surface microscopy or spectroscopy are discussed in some detail. The operation of the controller in a piezo‐driven point contact was studied experimentally.

AB - A new controller, especially suited for phase‐locked loops, is discussed. The controller, composed of RC‐circuit electronics, has a gain with a slope of −30 dB/decade over a wide bandwidth. It is shown that in certain systems the present controller (PI3/2 controller) provides a much higher feedback gain than an ordinary proportional‐integrator controller (PI controller). As applications, the superconducting quantum interference device (SQUID) and an electrically adjustable point contact used in surface microscopy or spectroscopy are discussed in some detail. The operation of the controller in a piezo‐driven point contact was studied experimentally.

U2 - 10.1063/1.1141337

DO - 10.1063/1.1141337

M3 - Article

VL - 61

SP - 2449

EP - 2451

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 9

ER -