Minimum interface biomedical monitoring system
First Claim
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1. An electrical apparatus for a main implant module interfaced with at least one implant sensor module, comprising:
- a power source located in the main implant module;
first and second wires running from the main implant module to a particular sensor module, said first wire connected to ground;
a switching means located in the main implant for selectively connecting said second wire to said power source during a powering phase and to electronics located in said main implant during a reading phase;
a sensor means located in the sensor module for detecting a physiological parameter;
processing electronics internal to said sensor module and operably coupled to said sensor means for providing a current, I, along the second wire to the electronics located in said main implant, said current I being functionally related to the sensed physiological parameter;
a capacitor means located in the sensor module and positioned across said first and second wires that is charged during the powering phase and for providing power to said processing electronics during the reading phase; and
a diode means located in the sensor module for disconnecting said capacitor from said second line during the reading phase.
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Abstract
The present invention is a universal interface allowing a main implant to supply power and receive data from remotely implanted sensor modules through a minimum number of interconnecting lines. The main module can supply a single DC voltage, two sequentially applied DC voltages or an AC voltage to the sensor module. A capacitor means in the sensor module supplies power while the sensor module is transmitting data.
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Citations
15 Claims
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1. An electrical apparatus for a main implant module interfaced with at least one implant sensor module, comprising:
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a power source located in the main implant module; first and second wires running from the main implant module to a particular sensor module, said first wire connected to ground; a switching means located in the main implant for selectively connecting said second wire to said power source during a powering phase and to electronics located in said main implant during a reading phase; a sensor means located in the sensor module for detecting a physiological parameter; processing electronics internal to said sensor module and operably coupled to said sensor means for providing a current, I, along the second wire to the electronics located in said main implant, said current I being functionally related to the sensed physiological parameter; a capacitor means located in the sensor module and positioned across said first and second wires that is charged during the powering phase and for providing power to said processing electronics during the reading phase; and a diode means located in the sensor module for disconnecting said capacitor from said second line during the reading phase. - View Dependent Claims (2, 3, 4)
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5. An electronic apparatus for a main implant module interfaced with at least one implant sensor module, comprising:
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a power source located in the main implant module having "V30 " and "V- " outputs; first and second wires running from the main implant module to a particular sensor module, said first wire connected to ground; a switching means located in the main implant for selectively connecting said second wire to "V+ " and then to "V- " during a powering phase and to electronics located in said main implant during a reading phase; a sensor means located in the sensor module for detecting a physiological parameter; processing electronics internal to said sensor module and operably coupled to said sensor means for providing a current, I, along the second wire to the electronics located in said main implant, said current I being functionally related to the sensed physiological parameter; and
,two capacitor means, each capacitor means connected by oppositely biased diodes between said first and second wires, said capacitors being charged during the powering phase, for providing power to said processing electronics during the reading phase. - View Dependent Claims (6, 7, 8, 9)
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10. An electronic apparatus for a main implant module interfaced with at least one implant sensor module, comprising:
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a power supply located in the main implant module having "V+ " and "V- " outputs; first and second wires running from the main implant module to a particular sensor module, said first wire connected to ground; a switching means located in the main implant for selectively connecting said second wire across "V+ " and "V- " to generate an alternating current across said first and second wires during a powering phase and to electronics located in said main implant module during a reading phase; a sensor means located in the sensor module for detecting a physiological parameter; processing electronics internal to said sensor module for producing a current, I, along the second wire to the electronics located in said main implant, said current I being functionally related to the sensed physiological parameter; a means in the sensor module for converting the alternating current supplied by said first and second wire into a dc voltage that is stored in a capacitor means. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification