METHOD OF SELF-TUNING THE VOLTAGE OF A RECHARGEABLE BATTERY OF AN ELECTRONIC DEVICE AND AN ELECTRONIC DEVICE OPERATING ACCORDING TO SUCH METHOD
First Claim
1. A method of compensating for a circuit offset error to a measure of a battery voltage of a rechargeable battery of an electronic device, wherein the battery powers an electronic circuitry of the device, the electronic circuitry introducing the circuit offset error to the measure of the battery voltage, the method comprising:
- assuming a nominal value for the battery voltage at full charge (V_BATT) and a correlated output function of the battery voltage at full charge (f(V_BATT));
iteratively measuring a supply voltage (VD_meas) to the device over a series of booting operations of the device, comprising for each booting operation the steps of;
turning on and booting the electronic device;
measuring a new value of the supply voltage (VD_meas) to the device, whereinif the new measured value of supply voltage (VD_meas) to the device is larger than a maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations, storing the new measured value of supply voltage (VD_meas) as new maximum value of the supply voltage (Max-VD_meas);
if the new measured value of supply voltage (VD_meas) to the device is smaller than the maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations, keeping the maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations stored for use in a next iteration; and
calculating the circuit offset error as the difference between;
the maximum value of the supply voltage (Max-VD_meas) over the series of booting operations; and
the output function of the battery voltage at full charge (f(V_BATT)).
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Accused Products
Abstract
An exemplary method of compensating for a circuit offset error to a measure of a battery voltage of a rechargeable battery of an electronic device is described wherein the battery powers an electronic circuitry of the device and the electronic circuitry introduces the circuit offset error to the measure of the battery voltage. A corresponding electronic device is also described.
5 Citations
13 Claims
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1. A method of compensating for a circuit offset error to a measure of a battery voltage of a rechargeable battery of an electronic device, wherein the battery powers an electronic circuitry of the device, the electronic circuitry introducing the circuit offset error to the measure of the battery voltage, the method comprising:
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assuming a nominal value for the battery voltage at full charge (V_BATT) and a correlated output function of the battery voltage at full charge (f(V_BATT)); iteratively measuring a supply voltage (VD_meas) to the device over a series of booting operations of the device, comprising for each booting operation the steps of; turning on and booting the electronic device; measuring a new value of the supply voltage (VD_meas) to the device, wherein if the new measured value of supply voltage (VD_meas) to the device is larger than a maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations, storing the new measured value of supply voltage (VD_meas) as new maximum value of the supply voltage (Max-VD_meas); if the new measured value of supply voltage (VD_meas) to the device is smaller than the maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations, keeping the maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations stored for use in a next iteration; and calculating the circuit offset error as the difference between; the maximum value of the supply voltage (Max-VD_meas) over the series of booting operations; and the output function of the battery voltage at full charge (f(V_BATT)). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic device comprising:
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a rechargeable battery that powers an electronic circuitry of the electronic device, the electronic circuitry introducing a circuit offset error to a measure of a battery voltage of the rechargeable battery; and a voltage tuning system configured to compensate for the circuit offset error to the measure of the battery voltage of the rechargeable battery by assuming a nominal value for the battery voltage at full charge (V_BATT) and a correlated output function of the battery voltage at full charge (f(V_BATT)); iteratively measuring a supply voltage (VD_meas) to the device over a series of booting operations of the device, comprising for each booting operation the steps of; turning on and booting the electronic device; measuring a new value of the supply voltage (VD_meas) to the device, wherein if the new measured value of supply voltage (VD_meas) to the device is larger than a maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations, storing the new measured value of supply voltage (VD_meas) as new maximum value of the supply voltage (Max-VD_meas); if the new measured value of supply voltage (VD_meas) to the device is smaller than the maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations, keeping the maximum (Max-VD_meas) of values of the supply voltage measured in connection with previous booting operations stored for use in a next iteration; and calculating the circuit offset error as the difference between; the maximum value of the supply voltage (Max-VD_meas) over the series of booting operations; and the output function of the battery voltage at full charge (f(V_BATT)). - View Dependent Claims (10, 11, 12, 13)
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Specification