Patent
Analog and digital telemetry system for an implantable device
TLDR
In this article, the use of PSK (phase shift keying) as the phase modulation scheme for transmission and reception is also taught, where the analog signal is used as a clock in the phase encoding of the digital signal and thus provides a signal simultaneously carrying analog and digital information.Abstract:
In an implantable device, transmission and reception of digital information is accomplished as well as the transmission and reception of analog information. The analog signal is FM modulated for transmission and the digital signal is phase modulated for transmission. The FM modulated signal is used as a clock in the phase encoding of the digital signal and thus provides a signal simultaneously carrying analog and digital information. Means for reception of the analog and digital information is taught. The use of PSK (phase shift keying) as the phase modulation scheme for transmission and reception is also taught.read more
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References
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Patent
Telemetry system for a medical device
TL;DR: In this paper, a data telemetry system for use with implanted medical devices for transmitting digital and analog data to a remote receiver by enabling different combinations of fixed and variable value current sources according to a telemetry logic code to energize a tank coil and produce a ringing type of variable frequency RF signal.
Patent
Implant telemetry system
Chester D. Slocum,John R. Batty +1 more
TL;DR: In this article, the lagging phase angle of the reflected signal is modulated at very low power by varying the impedance across the tuned coil in accordance with a data input signal.
Patent
Implantable telemetry transmission system for analog and digital data
TL;DR: An improved telemetry transmission system for transmitting electrocardiographic information, indications of the occurrence of the pacing pulse and for transmitting digitially encoded information from an implanted pacemaker, an implanted drug dispensing device, or other implanted device, to a remote receiver is described in this article.
Patent
Telemetry means for tissue stimulator system
TL;DR: A telemetry system for use in a living tissue stimulator system in which an externally located oscillator is controlled by impedance changes in an impedance reflecting circuit located in implantable tissue stimulators is presented in this paper.
Patent
Low current telemetry system for cardiac pacers
TL;DR: In this paper, a system for telemetering the performance of an implanted cardiac pacer incorporating a low power, low voltage, frequency-voltage sensitive pulse generator which supplies a pulse-interval-modulated telemetry output and includes an astable complementary multivibrator in combination with a voltage clipping feedback network.