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  1. Medical and Biological Engineering and Computing
  2. Medical and Biological Engineering and Computing : Volume 38
  3. Medical and Biological Engineering and Computing : Volume 38, Issue 4, July 2000
  4. Synthesis of a digitally controlled impedance element
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Medical and Biological Engineering and Computing : Volume 55
Medical and Biological Engineering and Computing : Volume 54
Medical and Biological Engineering and Computing : Volume 53
Medical and Biological Engineering and Computing : Volume 52
Medical and Biological Engineering and Computing : Volume 51
Medical and Biological Engineering and Computing : Volume 50
Medical and Biological Engineering and Computing : Volume 49
Medical and Biological Engineering and Computing : Volume 48
Medical and Biological Engineering and Computing : Volume 47
Medical and Biological Engineering and Computing : Volume 46
Medical and Biological Engineering and Computing : Volume 45
Medical and Biological Engineering and Computing : Volume 44
Medical and Biological Engineering and Computing : Volume 43
Medical and Biological Engineering and Computing : Volume 42
Medical and Biological Engineering and Computing : Volume 41
Medical and Biological Engineering and Computing : Volume 40
Medical and Biological Engineering and Computing : Volume 39
Medical and Biological Engineering and Computing : Volume 38
Medical and Biological Engineering and Computing : Volume 38, Issue 6, November 2000
Medical and Biological Engineering and Computing : Volume 38, Issue 5, September 2000
Medical and Biological Engineering and Computing : Volume 38, Issue 4, July 2000
Assessing the conditions forin vivo electrical virtual biopsies in Barrett's oesophagus
Derivation of extracellular fluid volume fraction and equivalent dielectric constant of the cell membrane from dielectric properties of the human body. Part 1: Incorporation of fat tissue into cell suspension model in the arm
Derivation of extracellular fluid volume fraction and equivalent dielectric constant of the cell membrane from dielectric properties of the human body. Part 2: A preliminary study for tracking the progression of surgical tissue injury
Design of an electrical impedance tomography phantom using active elements
Synthesis of a digitally controlled impedance element
Mechanical evaluation of a bio-active bone cement for total hip arthroplasty
Hierarchical state space partitioning with a network self-organising map for the recognition of ST-T segment changes
Transient phase locking patterns among respiration, heart rate and blood pressure during cardiorespiratory synchronisation in humans
Nonlinear transient response of electrode—electrolyte interfaces
Estimating the parameters of aerobic function during exercise using an exponentially increasing work rate protocol
Modelling the effects of electric fields on nerve fibres: Influence of the myelin sheath
Measurement of the performance of nerve cuff electrodes for recording
Modelling analysis of human optic nerve fibre excitation based on experimental data
Implantable measurement technique dedicated to the monitoring of electrode-nerve contact in bladder stimulators
Noise characteristic design of CMOS source follower and voltage amplifier for active semiconductor microelectrodes for neural signal recording
Structured sleeve for repair of implantable in-line connectors
Medical and Biological Engineering and Computing : Volume 38, Issue 3, May 2000
Medical and Biological Engineering and Computing : Volume 38, Issue 2, March 2000
Medical and Biological Engineering and Computing : Volume 38, Issue 1, January 2000
Medical and Biological Engineering and Computing : Volume 37
Medical and Biological Engineering and Computing : Volume 36
Medical and Biological Engineering and Computing : Volume 35

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Synthesis of a digitally controlled impedance element

Content Provider SpringerLink
Author Kleffel, R. Schneider, I. D. Jennings, D.
Copyright Year 2000
Abstract A practical design for the synthesis of a digitally controlled electrical impedance element is presented. The impedance element comprises a real impedance element in series with a voltage source whose magnitude is determined by the applied voltage multiplied by a factor k. The value of k is shown strongly to affect the circuit's performance. Results are presented which demonstrate the correspondence between circuit models and practical measurements. When negative values for k were employed the circuit element offered a controlled impedance range of 1:1000 and was stable to at least 1.5MHz, providing that low source impedance values were used. With a positive k, a restricted range of impedance values could be obtained and the value of source impedance was less critical, though the circuit's performance was acceptable only to about 100 kHz. Consideration is given to the specification of a multiplier that would permit the circuit's range of application to be extended to low megahertz frequencies.
Starting Page 395
Ending Page 400
Page Count 6
File Format PDF
ISSN 01400118
Journal Medical and Biological Engineering and Computing
Volume Number 38
Issue Number 4
e-ISSN 17410444
Language English
Publisher Springer-Verlag
Publisher Date 2000-01-01
Publisher Place Berlin, Heidelberg
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Electrical impedance tomography (EIT) Synthesised impedance Multiplying DAC Impedance spectroscopy Human Physiology Computer Applications Neurosciences Imaging Radiology Biomedical Engineering
Content Type Text
Resource Type Article
Subject Biomedical Engineering Computer Science Applications
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