Fully integrated signal conditioning of an accelerometer for implantable pacemakers

Arnaud, Alfredo; Galup-Montoro, Carlos

doi:10.1007/s10470-006-9708-y

Cited by 19 publications

(15 citation statements)

References 15 publications

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“…The judicious selection of transducers and cores can be decisive points for fabricating wireless instruments with low-power, reduced sizes and low-prices. This statement is especially evident on measurement instruments composed by reusable cores (for controlling and displaying/communicating), monolithic transducers (for signal acquisition) and on-chip signal conditioning circuits [33] (for signal processing).…”

Section: Display And/or Communicationmentioning

confidence: 99%

Wireless microsystems for biomedical applications

Carmo¹,

Correia²

2013

J. Microw. Optoelectron. Electromagn. Appl.

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This paper presents a review with the state-of-the-art of wireless microsystems for biomedical applications. Aspects including the radio-frequency systems, data acquisition, application specificities (especially those in the context of implantable devices), power consumption and issues associated to their integration are presented. A review of COTS (Commercial Off-The-Shelf) systems and new concepts and technologies are also presented.

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Section: Display And/or Communicationmentioning

confidence: 99%

Wireless microsystems for biomedical applications

Carmo¹,

Correia²

2013

J. Microw. Optoelectron. Electromagn. Appl.

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“…An accelerometer placed in a pacemaker detects movement and patient's physical activity and generates an electronic signal that is proportional to physical activity. Because it is non-invasive (the sensing device is placed inside the pacemaker without direct contact with the human body), this is the preferred technique used in most rate-responsive pacemakers sometimes complimented with sensors for other parameters such as ventilation rate, venous O 2 saturation, or body impedance [13]. An accelerometer evaluates amplitude representing a movement force and also a signal frequency, which is a rate scale factor of movement.…”

Section: A Activity Sensormentioning

confidence: 99%

Body Sensors Applied in Pacemakers: A Survey

Shi

Zhou

2012

IEEE Sensors J.

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This paper presents a survey of the body sensors applied in pacemakers and recent advances in modern pacemaker systems. New features of modern pacemakers that are commercially available are briefly described. Body sensors incorporated in pacemakers are illustrated with their rationales, sensing signals, advantages, limitations and applications. Their further improvements are needed to better serve patients.

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“…This BPF has a gain G BPF = 33 and cut-off frequencies at f p1 = 100 Hz and f p2 = 5 kHz. The transconductances values were selected following the guidelines in [22]: G m1 = 20 lS, G m2 = 683 nS, G m3 = 2.2 nS, C 1 = 78 pF and C 2 = 22 pF are poly1-poly2 capacitors. G m1,2,3 were implemented as a standard symmetrical OTAs using seriesparallel current division technique [23].…”

Section: Gm-c Band-pass Filtermentioning

confidence: 99%

On the reduction of thermal and flicker noise in ENG signal recording amplifiers

Gak

Miguez

Bremermann

et al. 2008

Analog Integr Circ Sig Process

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Because of the extremely low amplitude of the input signal, the design of electro-neuro-graph (ENG) amplifiers involves a special care for flicker and thermal noise reduction. The task becomes really challenging in the case of implantable electronics, because power consumption is restricted to few hundreds lW. In this work, two different circuit techniques aimed to reduce flicker and thermal noise, in ultra-low noise amplifiers for implantable medical devices, are demonstrated. The circuit design, and measurement results are presented, in both cases showing an excellent performance, and noise to power consumption trade-off. In the first circuit, a very simple low-pass G m -C chopper amplifier is used for flicker noise cancellation. It consumes only 28 mW, with a measured input referred noise and offset of 2 nV ffiffiffiffiffiffi Hz p , and 2.5 lV, respectively. In the second circuit, a ultra-low noise amplifier, a energyefficient DC-DC down-converter, and low voltage design techniques are combined, for the reduction of thermal noise with a minimum power consumption. Measured input referred noise in this case was 5.5 nV ffiffiffiffiffiffi Hz p at only 380 lW power consumption. Both circuits were fabricated in a 1.5 lm technology.

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Fully integrated signal conditioning of an accelerometer for implantable pacemakers

Cited by 19 publications

References 15 publications

Wireless microsystems for biomedical applications

Wireless microsystems for biomedical applications

Body Sensors Applied in Pacemakers: A Survey

On the reduction of thermal and flicker noise in ENG signal recording amplifiers

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