§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US5999857A Expired / Lapsed US ⏱️ 0.0 years remaining

Implantable device telemetry system and method

Assignee: JARO MICHAEL J
•
Filing: 1996-12-18
•
Granted: 1999-12-07
•
Expires: 2016-12-18
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract There is provided an improved telemetry system for use with implantable devices such as cardiac pacemakers and the like, for two-way telemetry between the implanted device and an external programmer. The system employs highly energy efficient oscillators with encoding circuits for synchronous transmission of data symbols, which symbols form the telemetry carrier. The system provides improved circuits for higher density data encoding of sinusoidal symbols, including improved combinations of BPSK, FSK, and ASK encoding. Embodiments of transmitters for both the implanted device and the external programmer, as well as modulator and demodulator circuits, are also disclosed, and specifically include oscillators which switch capacitors between a tank circuit and a recharge path, the switching being controlled to occur at moments of substantially zero coil current, thereby providing high efficiency operation.

Inventors

  • 👤 Koen J. Weijand
  • 👤 Richard P. M. Houben
  • 👤 Jeff Wilkinson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 12:06
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/372; A61N1/37211; A61N1/37252; A61N1/3727; Y; Y10; Y10S; Y10S128/00; Y10S128/903

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 72 words
In an implantable device, a transmitter for generating a telemetry signal which is made up of sinusoidal symbols, comprising oscillator means for generating sinusoidal symbols, said oscillator having a high Q coil for transmitting said telemetry signal; a source of data signals; and encoding means connected to receive said data signals, for encoding each of said symbols with a combination of BPSK, FSK and ASK data in accord with said data signals.
Claim 2
Dependent Claim 72 words
In an implantable device, a transmitter for generating a telemetry signal which is made up of sinusoidal symbols, comprising oscillator means for generating sinusoidal symbols, said oscillator having a high Q coil for transmitting said telemetry signal; a source of data signals; and encoding means connected to receive said data signals, for encoding each of said symbols with a combination of BPSK, FSK and ASK data in accord with said data signals.
Claim 3
Dependent Claim 29 words
The transmitter as described in claim 1, wherein said oscillator means has means for generating successive sinusoidal symbols, and means for synchronizing generation of said symbols with said encoding.
Claim 4
Dependent Claim 29 words
The transmitter as described in claim 2, wherein said synchronizing means comprises current means for generating control signals substantially coincident with zero crossings of the current through said coil.
Claim 5
Dependent Claim 20 words
The transmitter as described in claim 3, wherein said oscillator means comprises means for generating symbols of one sinusoidal cycle.
Claim 6
Dependent Claim 20 words
The transmitter as described in claim 3, wherein said oscillator means comprises means for generating symbols of one-half sinusoidal cycle.
Claim 7
Dependent Claim 33 words
The transmitter as described in claim 3, wherein said encoding means has logic means for encoding a said symbol in accord with the data signal at the time of a said control signal.
Claim 8
Dependent Claim 26 words
The transmitter as described in claim 1, wherein said encoding means has means for encoding each said symbol with up to about 3.5 bits of data.

References Cited (Backward Citations)

US4571589A Cited
US4681111A Cited
US4847617A Cited
US4944299A Cited
US4947407A Cited
US4972438A Cited
US4980898A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2002-12-06 2003-06-07 2003-12-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2006-12-06 2007-06-07 2007-12-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2010-12-06 2011-06-07 2011-12-07 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag