Detecting overloading of an analog-to-digital converter of an implantable medical device
First Claim
1. A method of detecting overload in an implantable medical device, comprising:
- converting an analog input signal from a sensor into a digital signal with an analog-to-digital converter (ADC) of the implantable medical device;
determining that the ADC is in an overload condition based on at least one signal from the ADC; and
disregarding the digital signal by a processor of the implantable medical device in response to the determination.
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Abstract
In general, this disclosure is related to detecting overload within an analog-to-digital converter (ADC) of an implantable medical device (IMD). The IMD may include an overload detection module that determines whether the ADC is operating in an overload condition. When the overload detection module determines the ADC is operating in the overload condition for a particular period of time, the ADC may send an overload signal to a processor that processes the output of the ADC. The overload signal notifies the processor that the ADC is operating in or is close to operating in the overload condition. In response to the indication from the ADC, the processor of the IMD may disregard the output of the ADC. The processor may continue to disregard the output of the ADC until the overload signal is deactivated, thereby indicating that the ADC is no longer in an overloaded condition.
89 Citations
25 Claims
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1. A method of detecting overload in an implantable medical device, comprising:
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converting an analog input signal from a sensor into a digital signal with an analog-to-digital converter (ADC) of the implantable medical device; determining that the ADC is in an overload condition based on at least one signal from the ADC; and disregarding the digital signal by a processor of the implantable medical device in response to the determination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable medical device, comprising:
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an analog-to-digital converter (ADC) that converts an analog input signal from a sensor into a digital signal; an overload detection module that determines that the ADC is in an overload condition based on at least one signal from the ADC; and a processor that disregards the digital signal in response to the determination. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An implantable medical device, comprising:
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an analog-to-digital converter (ADC) that converts an analog input signal from a sensor into a digital signal, wherein the ADC includes a clamping integrator that generates a clamp signal when the clamping integrator is operating in a clamped mode; an overload detection module that determines that the ADC is in an overload condition based on the clamp signal from the ADC; and a processor that disregards the digital signal in response to the determination. - View Dependent Claims (17)
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18. An implantable medical device, comprising:
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an analog-to-digital converter (ADC) that converts an analog input signal from a sensor into a digital signal; an overload detection module that that generates a low toggle signal if a quantizer of the ADC outputs the same value during a threshold number of consecutive clock cycles and determines that the ADC is in an overload condition based on the low toggle; and a processor that disregards the digital signal in response to the determination. - View Dependent Claims (19)
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20. An implantable medical device comprising:
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an analog-to-digital converter (ADC) that converts an analog input signal from a sensor into a digital signal; and an overload prediction module that determines that the ADC is approaching an overload condition based on at least one signal from the ADC, and generates a warning signal in response to the determination, wherein the ADC switches from a normal slew operating mode to a high slew operating mode in response to the warning signal. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification