Delta-sigma modulator for outputting analog representation...

Details Delta-sigma modulator for outputting analog representation... Delta-sigma modulator for outputting analog representation...

A - Human Necessities

61

B

A61B 5/00 (2006.01)

Patent

CA 2556755

A method and apparatus for providing a substantially real-time representation of an analog representation of a physiological signal. The waveform signal from the sensor is converted into digital form. A delta-sigma modulator is used as a simple Digital-to-analog Converter (ADC). The output can then be provided through a simple hardware filter to give an analog output signal in nearly real-time, which can be used for other instruments, synchronization, display, etc.

Un appareil et un procédé conçus pour fournir une représentation sensiblement en temps réel d'une représentation analogique d'un signal physiologique. Le signal de forme d'onde provenant du capteur est converti en forme numérique. Un modulateur delta-sigma sert de convertisseur numérique/analogique simple ADC. La sortie peut alors être restituée par un filtre matériel simple pour donner un signal de sortie analogique en temps presque réel que l'on peut utiliser pour d'autres instruments, la synchronisation, l'affichage, etc.

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