Readers must therefore always check the product information and clinical procedures with the most up to date published product information and data sheets provided by the manufacturers and the most recent codes of conduct and safety regulations. The authors and the publishers do not accept responsibility or legal liability for any errors in the text or for the misuse or misapplication of material in this work. Except where otherwise stated, drug dosages and recommendations are for the non-pregnant adult who is not breastfeeding.
This chapter examines the characteristics of instrumentation needed to perform MEG and EEG recordings, and some practicalities of the recordings. For EEG, the effects of different reference electrodes are compared. Shielding against external artifacts, and the nature of specialized shielded rooms and their use is described. Access to the complete content on Oxford Medicine Online requires a subscription or purchase.
Public users are able to search the site and view the abstracts for each book and chapter without a subscription. Please subscribe or login to access full text content. If you have purchased a print title that contains an access token, please see the token for information about how to register your code.
For questions on access or troubleshooting, please check our FAQs , and if you can't find the answer there, please contact us. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use for details see Privacy Policy and Legal Notice.
Oxford Medicine Online. Publications Pages Publications Pages. Recently viewed 0 Save Search. The AD employs new process technologies and design techniques to achieve higher dynamic range and lower errors than its predecessors, while consuming less than one-third of the power.
The AD uses the high performance pinout introduced by the AD Very low bias current makes the AD error-free with high source impedance, allowing multiple sensors to be multiplexed to the inputs.
Low voltage noise and low current noise make the AD an ideal choice for measuring a Wheatstone bridge.
The wide input range and rail-to-rail output of the AD bring all of the benefits of a high performance in-amp to single-supply applications.
Whether using high or low supply voltages, the power savings make the AD an excellent choice for high channel count or power sensitive applications. The AD uses robust input protection that ensures reliability without sacrificing noise performance. The AD has high ESD immunity, and the inputs are protected from continuous voltages up to 40 V from the opposite supply rail. A single resistor sets the gain from 1 to The reference pin can be used to apply a precise offset to the output voltage.
Frequency domain measurements can use the wideband linear phase filter. The wideband and sinc5 filters can be selected and run on a per channel basis. The ability to vary the decimation filtering optimizes noise performance to the required input bandwidth. Embedded analog functionality on each ADC channel makes design easier, such as a precharge buffer on each analog input that reduces analog input current and a precharge reference buffer per channel reduces input current and glitches on the reference input terminals.
The AD integrates key analog and digital signal conditioning blocks to allow users to configure an individual setup for each analog input channel in use. Each feature can be user selected on a per channel basis. Integrated true rail-to-rail buffers on the analog inputs and external reference inputs provide easy to drive high impedance inputs.
The precision 2. The digital filter allows simultaneous 50 Hz and 60 Hz rejection at a The user can switch between different filter options according to the demands of each channel in the application. The ADC automatically switches through each selected channel. Further digital processing functions include offset and gain calibration registers, configurable on a per channel basis.
A 7 V to 9 V ac-to-dc adapter is regulated to 5 V and 3. The AD evaluation software fully configures the AD device functionality via a user accessible register interface and provides dc time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.
Full specifications for the AD are available in the product data sheet, which should be consulted in conjunction with this user guide UG when using the evaluation board. Electroencephalogram EEG Measurement.
Vital Signs Measurements. Featured Products. Applications Medical instrumentation Precision data acquisition Transducer interfaces.
0コメント