Power dissipation reduction in medical devices using adiabatic logic
First Claim
1. A system for generating a logic signal which is provided to a portion of an implantable medical device and which minimizes power dissipation within the implantable medical device, the system comprising:
- a capacitive element associated with a bus within the implantable medical device, wherein the capacitive element is operatively coupled to a first potential;
N voltage supplies;
N switches corresponding to the N voltage supplies, each switch being operatively coupled between a corresponding one of the N voltage supplies and the capacitive element;
a first switch operatively coupled in parallel with the capacitive element between the N switches and the first potential; and
a controller operatively coupled to the N switches and to the first switch to control the N switches and the first switch.
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Accused Products
Abstract
A system for minimizing power dissipation within an implantable medical device through use of adiabatic logic is disclosed. The system includes a first and a second sub-circuit of the implantable medical device. An electrical connection interconnects the first and the second sub-circuits, the electrical connection including a capacitive element. Circuitry, which charges the capacitive element of the electrical connection to generate a ramp logic signal, is connected to the capacitive element. The ramp logic signal includes a frequency of less than 500 kilohertz, thereby creating a low frequency, low power system which reduces energy dissipation to the surrounding environment.
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Citations
23 Claims
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1. A system for generating a logic signal which is provided to a portion of an implantable medical device and which minimizes power dissipation within the implantable medical device, the system comprising:
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a capacitive element associated with a bus within the implantable medical device, wherein the capacitive element is operatively coupled to a first potential;
N voltage supplies;
N switches corresponding to the N voltage supplies, each switch being operatively coupled between a corresponding one of the N voltage supplies and the capacitive element;
a first switch operatively coupled in parallel with the capacitive element between the N switches and the first potential; and
a controller operatively coupled to the N switches and to the first switch to control the N switches and the first switch. - View Dependent Claims (2, 3, 4, 5)
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6. A system for generating a logic signal which is provided to a portion of an implantable medical device and which minimizes power dissipation within the implantable medical device, the system comprising:
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a first switch operatively coupled to a first voltage potential;
a capacitive element associated with a bus within the implantable medical device operatively coupled to a second voltage potential;
a second switch operatively coupled to the second voltage potential in parallel with the capacitive element;
N parallel capacitors operatively coupled to the first voltage potential;
N parallel switches corresponding to the N parallel capacitors, each switch being operatively coupled between a corresponding one of the N capacitors and the capacitive element; and
a controller operatively coupled to the first switch, the second switch, and the N parallel switches to control the first switch, the second switch, and the N switches. - View Dependent Claims (7, 8, 9, 10)
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11. A system for generating a voltage signal which is provided to a portion of an implantable medical device and which minimizes power dissipation within the implantable medical device, the system comprising:
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a first current source operatively coupled to a first voltage potential;
a second current source operatively coupled to a second voltage potential;
a capacitive element associated with a bus within the implantable medical device operatively coupled to the second voltage potential;
a switch operatively coupled between the capacitive element and the first and second current sources for operatively coupling one of the first and second current sources to the capacitive element; and
a controller operatively coupled to the switch to control the switch. - View Dependent Claims (12, 13, 14, 15, 17, 20, 21, 22, 23)
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16. A system for generating a logic signal which is provided to a portion of an implantable medical device and which minimizes power dissipation within the implantable medical device, the system comprising:
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a clock having an output clock signal;
an inverter having an input, an output, and a resistance, wherein the output clock signal of the clock is operatively coupled to the input of the inverter;
an inductive element operatively coupled to the output of the inverter;
a buffer having an input, an internal input capacitance, and an output, wherein the input is operatively coupled to the inductive element; and
wherein the logic signal is generated at the output of the buffer and is provided to a portion of the implantable medical device.
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18. An implantable medical device having an adiabatic scheme which is provided to a portion of an implantable medical device and which minimizes power dissipation from a sub-component of the implantable medical device, the implantable medical device comprising:
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a first sub-circuit;
a second sub-circuit;
an electrical connection between the first and second sub-circuits, the. electrical connection including a capacitive element;
means for generating a logic signal having a frequency of less than 500 kilohertz, the logic signal including a plurality of repeating cycles, each cycle further comprising;
a first cycle portion where the ramped logic signal is at a first voltage;
a second cycle portion where the ramped logic signal is ramped from the first voltage to a second voltage;
a third cycle portion where the logic signal is at the second voltage;
a fourth cycle portion where the logic signal is ramped from the second voltage to the first voltage; and
means for supplying the logic signal to one of the first and second sub-circuits.
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19. A method of generating a logic signal for a portion of an implantable medical device which minimizes power dissipation within the implantable medical device, the method comprising:
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charging a capacitive element associated with a bus to generate a logic signal including a plurality of repeating cycles, each cycle comprising;
a first cycle portion where the logic signal is at a first voltage;
a second cycle portion where the ramped logic signal is ramped from the first voltage to a second voltage;
a third cycle portion where the logic signal is at the second voltage;
a fourth cycle portion where the logic signal is ramped from the second voltage to the first voltage; and
supplying the logic signal to the portion of the implantable medical device.
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Specification