Multi-bit adc with sigma-delta modulation

A - Human Necessities – 61 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61B 5/00 (2006.01)

Patent

CA 2556754

An oximeter uses a sigma-delta modulator and a multi-bit ADC (54) with PWM feedback (56) enabling high precision multi-bit conversion. Demodulation is done in software, thus requiring only a single hardware path for both red and IR. Multiple capacitors are switched into the integrator (44) in the sigma- delta modulator, with different capacitors for red, IR and dark signals, thus enabling the use of the single hardware path. A switching circuit (76) at the input of the sigma-delta modulator acts as a sample and hold, controlled by the PWM feedback (56).

Un oxymètre comprend un modulateur sigma-delta et un CAN multi-bit à rétroaction modulé par impulsions en durée (MID) assurant une conversion multi-bit de haute précision. La démodulation est effectuée par logiciel, ceci ne nécessitant qu'un chemin matériel unique pour les deux composantes rouge et IR. Plusieurs condensateurs sont commutés dans l'intégrateur du modulateur sigma-delta, des condensateurs différents étant associés aux signaux rouge, IR et noir, ce qui permet d'utiliser un chemin matériel unique. Un circuit de commutation présent au niveau de l'entrée du modulateur sigma-delta fait office de circuit d'échantillon et de maintien, commandé par la rétroaction MID.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Multi-bit adc with sigma-delta modulation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-bit adc with sigma-delta modulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-bit adc with sigma-delta modulation will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1355344

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.