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. 29, 2017
Filed:
Feb. 23, 2015
Sorin Crm Sas, Clamart, FR;
Alaa Makdissi, Paris, FR;
SORIN CRM SAS, Clamart, FR;
Abstract
An RF telemetry receiver circuit for active implantable medical devices. The baseband binary signal (D) is doubly modulated by a low frequency carrier (F) and by a high frequency carrier (F). The receiver circuit is a semi-passive non heterodyne circuit, devoid of a local oscillator and mixer. It comprises an antenna (), a passive bandpass filter () centered on the high-frequency carrier (F), a passive envelope detector (-) and a digital demodulator (). The envelope detector comprises a first diode circuit () of non-coherent detection, an active bandpass filter () centered on a frequency (2.F) twice the low frequency carrier and having a bandwidth (2.D) twice the baseband bandwidth, and a second diode circuit () of non-coherent detection, outputting a baseband signal applied to the digital demodulation stage ().