Cards with power management
First Claim
Patent Images
1. A card comprising:
- a power source operative to provide power via a power source voltage, a voltage range of the power source voltage including a maximum power source voltage and a minimum power source voltage;
power management circuitry electrically coupled to the power source; and
power consuming circuitry electrically coupled to the power management circuitry, the power consuming circuitry including a first circuitry with a maximum operating voltage that is less than the maximum power source voltage,wherein the power management circuitry is operative to provide power to the power consuming circuitry at a voltage less than the maximum operating voltage,the power management circuitry includes at least one circuit element selected from the group consisting of a transistor and a diode,the at least one circuit element is operable to receive an input signal, and the input signal is based on a comparison between a threshold and a monitored signal.
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Abstract
A card with power management circuitry is provided. A card may have circuitry contained therein (e.g., a processor) that may have a maximum operating voltage. The card may include a power source (e.g., a battery) that provides power ranging in voltage from a maximum power source voltage to a minimum power source voltage. The maximum power source voltage is greater than the maximum operating voltage. Power management circuitry is provided to manage the power received from the power source such that the voltage provided to the circuitry (e.g., processor) does not exceed the maximum operating voltage.
343 Citations
25 Claims
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1. A card comprising:
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a power source operative to provide power via a power source voltage, a voltage range of the power source voltage including a maximum power source voltage and a minimum power source voltage; power management circuitry electrically coupled to the power source; and
power consuming circuitry electrically coupled to the power management circuitry, the power consuming circuitry including a first circuitry with a maximum operating voltage that is less than the maximum power source voltage,wherein the power management circuitry is operative to provide power to the power consuming circuitry at a voltage less than the maximum operating voltage, the power management circuitry includes at least one circuit element selected from the group consisting of a transistor and a diode, the at least one circuit element is operable to receive an input signal, and the input signal is based on a comparison between a threshold and a monitored signal. - View Dependent Claims (2, 3, 4, 5)
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6. A card comprising:
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a battery operative to supply power via a battery voltage, a voltage range of the battery including a maximum battery voltage and a minimum battery voltage; and
power management circuitry coupled to receive power from the battery and provide managed power via an output node, the power management circuitry operative to selectively provide a power management voltage to the output node through a voltage protection path or a directly coupled path,wherein the voltage protection path reduces a magnitude of the battery voltage an amount, the directly coupled path effectively directly couples the battery voltage to the output node, the power management circuitry includes at least one circuit element selected from the group consisting of a transistor and a diode, the at least one circuit element is operable to receive an input signal, and the input signal is based on a comparison between a threshold and a monitored signal. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A card comprising:
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a lithium polymer battery; power management circuitry coupled to the battery and operative to provide managed power; and processor circuitry coupled to receive the managed power from the power management circuitry, wherein the power management circuitry is operative to manage power according to either a voltage protection mode or a direct voltage mode, the power management circuitry includes at least one circuit element selected from the group consisting of a transistor and a diode, the at least one circuit element is operable to receive an input signal, and the input signal is based on a comparison between a threshold and a monitored signal. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method for managing supply of power in a card, the card comprising at least first circuitry having a maximum operating voltage, the method comprising:
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receiving power from a power source, the received power associated with a power source voltage, a voltage range of the power source voltage including a maximum power source voltage and a minimum power source voltage; monitoring a power signal; providing an input signal to at least one circuit element based on a comparison between the monitored power signal and a threshold, wherein the at least one circuit element is selected from the group consisting of a transistor and a diode; and selectively routing the power source voltage through one of at least two paths based on the input signal such that a maximum possible managed power voltage is provided to at least the first circuitry, without the maximum possible managed power voltage exceeding the maximum operating voltage. - View Dependent Claims (23, 24, 25)
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Specification