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:
Oct. 16, 2012
Filed:
Feb. 10, 2010
Scot C. Boon, Lino Lakes, MN (US);
Keith R. Maile, New Brighton, MN (US);
William J. Linder, Golden Valley, MN (US);
Paul Huelskamp, St. Paul, MN (US);
Ramprasad Vijayagopal, Shoreview, MN (US);
Scot C. Boon, Lino Lakes, MN (US);
Keith R. Maile, New Brighton, MN (US);
William J. Linder, Golden Valley, MN (US);
Paul Huelskamp, St. Paul, MN (US);
Ramprasad Vijayagopal, Shoreview, MN (US);
Cardiac Pacemakers, Inc., St. Paul, MN (US);
Abstract
An intra-body ultrasonic signal can be converted into a first electrical signal, a local oscillator signal can be generated in an implantable system. The first electrical signal and the local oscillator signal can be mixed in an implantable system, such as to generate a demodulated signal, processed, such as using a filter. The filtered, demodulated signal can be further processed, such as implantably determining a peak amplitude of the first portion of the demodulated signal received from the filter over a time interval, implantably generating a dynamic tracking threshold that starts at an amplitude proportional the first portion of the demodulated signal and exponentially decays over a time interval, and determining a noise floor in the absence of a received intra-body ultrasonic signal and implantably comparing the peak amplitude and the tracking threshold and generate the digital output based on the difference.