A high open-loop gain controller

Heikki Seppä; Hannu Sipola

doi:10.1063/1.1141337

A high open-loop gain controller

Heikki Seppä, Hannu Sipola

Research output: Contribution to journal › Article › Scientific › peer-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 language	English
Pages (from-to)	2449-2451
Journal	Review of Scientific Instruments
Volume	61
Issue number	9
DOIs	https://doi.org/10.1063/1.1141337
Publication status	Published - 1990
MoE publication type	A1 Journal article-refereed

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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.",

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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

SN - 0034-6748

VL - 61

SP - 2449

EP - 2451

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 9

ER -

A high open-loop gain controller

Abstract

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