Article

Analysis of Class-E Amplifier with Mixed Data Modulation for Biotelemetry

School of Electrical Engineering and Computer Science, University of Newcastle, Callaghan, NSW 2308, Australia.
Conference proceedings: ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 02/2007; 2007:5680-3. DOI: 10.1109/IEMBS.2007.4353635
Source: IEEE Xplore

ABSTRACT

As integrated circuit technology advances, implantable biotelemetry devices will be able to handle more complex functions. Their flexibility and performance can be increased by incorporating multi-rate and multi-modulation schemes. The Class-E transmitter has been a primary choice so far in implantable devices as it provides low-power design with high-power efficiency. This paper investigates the design procedures of class-E amplifier for different modulation schemes in biotelemetry systems. A Class-E transmitter circuit that produces OOK, FSK and PSK modulated signals has been designed, optimized and analyzed in terms of a second order system for general implantable electronics.

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    • "Power efficiency and optimum power transfer is one of the key factors in the design of the power amplifier. For several reasons Class-E amplifier is widely used in implantable devices and biomedical telemetry system, such as cochlear implant, retinal implant, brain implant, pacemaker and detection of neural signals, due to it requires only one active device (simplest), high power transmission [1], and when used as a modulator, it eliminates the need for a mixer and that consumes the power [2]. Class-E mostly has been optimized for power signals [3]. "
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    ABSTRACT: This paper introduces a modified an efficient design for different Class-E power amplifiers suitable to be use in biomedical implantable devices and in biomedical wireless telemetry devices which is usually have a small load resistor (several Ohms) due to its inductive powering. The different Class-E amplifiers operated according to the frequency chart for the medical implant communications service (MICS) 27 MHZ, and industrial scientific and medical (ISM) (13.56 MHZ), and low frequency 125-135 KHZ. The results show that the proposed class-E design could use the same values of C1, C2, L2 for small and optimum load resistor with high efficient more than 80% All these three class-E power amplifiers will be presents in this work and will be simulate with the MATLAB/SIMULINK environment, and for further verification all the circuits will be simulated with electronics workbench MULTISIM 9.
    Full-text · Conference Paper · Feb 2012
  • Source
    • "Power efficiency and optimum power transfer is one of the key factors in the design of the power amplifier. For several reasons Class-E amplifier is widely used in implantable devices and biomedical telemetry system, such as cochlear implant, retinal implant, brain implant, pacemaker and detection of neural signals, due to it requires only one active device (simplest), high power transmission [1], and when used as a modulator, it eliminates the need for a mixer and that consumes the power [2]. Class-E mostly has been optimized for power signals [3]. "
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper introduces a modified an efficient design for different Class-E power amplifiers suitable to be use in biomedical implantable devices and in biomedical wireless telemetry devices which is usually have a small load resistor (several Ohms) due to its inductive powering. The different Class-E amplifiers operated according to the frequency chart for the medical implant communications service (MICS) 27 MH Z, and industrial scientific and medical (ISM) (13.56 MH Z), and low frequency 125-135 KH Z . The results show that the proposed class-E design could use the same values of C 1 , C 2 , L 2 for small and optimum load resistor with high efficient more than 80% All these three class-E power amplifiers will be presents in this work and will be simulate with the MATLAB/SIMULINK environment, and for further verification all the circuits will be simulated with electronics workbench MULTISIM 9.
    Full-text · Conference Paper · Feb 2012
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    ABSTRACT: The use of switching power amplifiers in the driver stage of a biomedical inductive power system is investigated. The main emphasis is on miniature biomedical implant systems where the receiver coils are very small compared to the transmitter coil and where magnetic coupling is very weak. Because of the weak coupling the driver circuit is almost independent of the load variation in the secondary coil. This makes it possible to design the driver circuit for a fixed primary coil parasitic resistance, which acts as an effective load. The goal is to design a primary coil driver circuit for a specified current level determined by field regulations for biomedical devices, by using parameters determined by the coupled electromagnetic system.
    No preview · Conference Paper · Jul 2010
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