Power consumption reduction in medical devices employing multiple supply voltages and clock frequency control
First Claim
1. A method of conserving power in a medical device, the method comprising:
- providing processing circuitry operable for performing at least a first and second function;
operating the processing circuitry at a first supply voltage level to perform the first function;
operating the processing circuitry at a second supply voltage level to perform the second function, wherein the first supply voltage level is different from the second supply voltage level; and
completing the first function just prior to the start of the second function.
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Abstract
Power consumption in medical devices is reduced through the operation of circuits at clock speeds of lower levels to adequately complete desired functions during predetermined time periods (e.g., blanking interval, upper rate interval, etc.) just-in-time prior to subsequent required functional processes; by providing supply voltages tailored for various circuits of an integrated circuit; by operating two or more circuits of an integrated circuit at different clock frequencies; by changing the supply voltage level “on the fly” as required by specific circuit timing functions required for various circuitry based on clock frequencies used to control operation of such circuitry; and/or by tailoring back gate bias or adjusting back gate bias “on the fly” for circuits based on the supply voltage level applied to the circuits.
60 Citations
10 Claims
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1. A method of conserving power in a medical device, the method comprising:
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providing processing circuitry operable for performing at least a first and second function;
operating the processing circuitry at a first supply voltage level to perform the first function;
operating the processing circuitry at a second supply voltage level to perform the second function, wherein the first supply voltage level is different from the second supply voltage level; and
completing the first function just prior to the start of the second function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
determining the first supply voltage level based on the first clock frequency; and
determining the second supply voltage level based on the second clock frequency.
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4. The method of claim 2, wherein the first clock frequency is higher than the second clock frequency.
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5. The method of claim 2, wherein the first clock frequency is higher than the second clock frequency.
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6. The method of claim 5, wherein the first function is a function selected from the group of high speed telemetry uplink/downlink, morphology detection, device initialization, arrhythmia detection, far-field R-wave detection, EMI detection, and retrograde conduction.
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7. The method of claim 5, wherein the second function is selected from the group of intrinsic heartbeat sensing, pacing, low speed telemetry, transtelephonic data, and batter check.
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8. The method of claim 1, wherein the step of providing the processing circuitry further comprises the method of providing circuitry of at least one type selected from the group consisting of CMOS circuitry, CML circuitry, SOS circuitry, SOI circuitry, BICMOS circuitry, PMOS circuitry and NMOS circuitry.
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9. The method of claim 1, further comprising the step of providing an hermetically sealed implantable medical device as said medical device.
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10. The method of claim 9, wherein provision of the implantable medical device further comprises the step of providing an implantable medical device selected from the group consisting of an implantable stimulator, an implantable nerve stimulator, an implantable pacemaker, an IPG, an implantable cardioverter, an implantable PCD, an implantable defibrillator, an implantable ICD and an implantable drug pump.
Specification