The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2011
Filed:
Mar. 08, 2007
Pinchas Novac, Neuchâtel, CH;
Pinchas Novac, Neuchâtel, CH;
EM Microelectronic-Marin S.A., Marin, CH;
Abstract
The invention concerns a conditioning circuit () for an external signal (IN) representative of a physiological quantity, arranged between an optical sensor () and a processing unit (), the received external signal (IN) being broken down into a useful component and an ambient component, characterized in that the conditioning circuit includes a first stage () including a transimpedance amplifier with an incorporated high pass filter () using a feedback loop to subtract the ambient signal component from the received external signal, and to deliver at output an amplified useful signal (IN), a second stage () including a blocker sampler circuit () for demodulating the amplified useful signal and delivering at output a demodulated useful signal (IN), and a third stage () including a bandpass filter () for filtering the demodulated useful signal in the frequency band of the physiological quantity to be detected and for transmitting a conditioned signal (OUT) to the processing unit.