High speed digital telemetry system for implantable devices

Details High speed digital telemetry system for implantable devices High speed digital telemetry system for implantable devices

1987-08-14

1989-07-11

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

Condition responsive

340870390, 340310R, 128419R, 128420R, 600 12, G08B 2100, G08C 1928

Patent

active

048476170

ABSTRACT:
A telemetry system for use with implantable medical devices is disclosed which utilizes both in-phase and quadrature data components, and frequency modulates both data components into a single transmitted sinusoidal signal which varies in frequency between two selected frequencies. The signal is received and decoded, preferably by a coherent decoder, into in-phase and quadrature components, which are then integrated and sampled to produce the two transmitted in-phase and quadrature data components, which may then be recombined to produce the transmitted data. The system requires only low power, and is capable of operating at a relatively high data rate while retaining a high degree of accuracy due to the splitting of the signal into the in-phase and quadrature data components.

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patent: 4741340 (1988-05-01), Batina et al.
Coherent Demodulation of Frequency-Shift Keying With Low Duration Ratio, deBuda et al, IEEE Transactions on Communications, Jun. 1972, pp. 429-435.
Minimum-Shift-Keying Modum for Digitized-Voice Communications, Sass et al, RCA Journal, 1974.

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