Power supply circuit for mobile telecommunications devices
First Claim
Patent Images
1. A cellular telecommunications device comprising:
- a modem; and
a power supply circuit, said power supply circuit including a current booster which is rendered operable in response to the modem searching for a base station and inoperable when the modem is in communication with a base station, so that additional current is supplied to the modem when searching for a base station,wherein the modem has a status contact whose voltage changes dependent upon whether the modem is searching for or is in communication with a base station, andwherein the cellular telecommunications device includes a sensing circuit operable to sense the voltage on the status contact and to render the current booster operable or inoperable dependent upon the sensed voltage.
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Accused Products
Abstract
A power supply circuit for the modem of a mobile telecommunications device comprises a battery, a modem status detection circuit for detecting whether the modem is in communication with a base station or is searching for a base station, a current or voltage booster, and a switching circuit controlled by the detection circuit for switching the current or voltage booster into and out of operation such that the booster provides additional current to the modem when it is searching for a base station.
10 Citations
16 Claims
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1. A cellular telecommunications device comprising:
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a modem; and a power supply circuit, said power supply circuit including a current booster which is rendered operable in response to the modem searching for a base station and inoperable when the modem is in communication with a base station, so that additional current is supplied to the modem when searching for a base station, wherein the modem has a status contact whose voltage changes dependent upon whether the modem is searching for or is in communication with a base station, and wherein the cellular telecommunications device includes a sensing circuit operable to sense the voltage on the status contact and to render the current booster operable or inoperable dependent upon the sensed voltage. - View Dependent Claims (2, 3)
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4. An identity verification device comprising:
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a biometric sensor; and a cellular telecommunications device, the cellular telecommunications device comprising a modem and a power supply circuit, said power supply circuit including a current booster which is rendered operable in response to the modem searching for a base station and inoperable when the modem is in communication with a base station, so that additional current is supplied to the modem when searching for a base station, the verification device being operable for performing identity verification operations utilizing the biometric sensor in response to receipt of a verification command via a cellular telecommunications network. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification