Power management circuit
First Claim
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1. A power management circuit for a system comprising:
- a power supply from an inductively coupled circuit;
a power supply from a battery, a voltage sensing circuitry for sensing the voltage of each said power supplies, a switching arrangement for selectively connecting one of said power supplies with at least one user, and control circuitry controlling said switching arrangement in response to an output of said voltage sensing circuitry.
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Abstract
A power management circuit for a system that has combined power supplies from an inductively coupled circuit and from a battery comprises voltage sensing circuitry for sensing the voltage of each of the power supplies. A switching arrangement selectively connects one of the power supplies with a user or with plural users. The switching arrangement is controlled by appropriate control circuitry in response to outputs from the voltage sensing circuitry. The power management makes the best use of energy received over the inductive interface to preserve battery lifetime.
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Citations
16 Claims
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1. A power management circuit for a system comprising:
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a power supply from an inductively coupled circuit;
a power supply from a battery, a voltage sensing circuitry for sensing the voltage of each said power supplies, a switching arrangement for selectively connecting one of said power supplies with at least one user, and control circuitry controlling said switching arrangement in response to an output of said voltage sensing circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification