Portable object with self switching device
First Claim
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1. A portable electronic device comprising:
- an electronic circuit;
a switching circuit, comprising;
a first diode, a second diode, and a transistor;
at least one electromagnetic field detection circuit; and
a battery coupled with the electronic circuit through the switching circuit that makes it possible to switch on and off a power supply voltage to the electronic circuit using the battery, the transistor establishing a cutting on and off the power voltage to the electronic circuit by the battery,wherein the at least one electromagnetic field detection circuit is coupled with the switching circuit to start the supply of power to the electronic circuit if an electromagnetic field is detected, andwherein the switching circuit is powered through the first diode by the battery when the transistor is on and the switching circuit is powered through the second diode by the electromagnetic field when the transistor is off.
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Abstract
A portable electronic device 1 comprising a battery 14 coupled with an electronic circuit 10-12 through a switching circuit 15 for switching on or off the supply voltage Vcc to the electronic circuit using the battery. The portable device comprises at least one electromagnetic field detection circuit 13 coupled with the switching circuit 15 to start the power supply to the electronic circuit 10-12 if an electromagnetic field is detected.
7 Citations
8 Claims
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1. A portable electronic device comprising:
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an electronic circuit; a switching circuit, comprising;
a first diode, a second diode, and a transistor;at least one electromagnetic field detection circuit; and a battery coupled with the electronic circuit through the switching circuit that makes it possible to switch on and off a power supply voltage to the electronic circuit using the battery, the transistor establishing a cutting on and off the power voltage to the electronic circuit by the battery, wherein the at least one electromagnetic field detection circuit is coupled with the switching circuit to start the supply of power to the electronic circuit if an electromagnetic field is detected, and wherein the switching circuit is powered through the first diode by the battery when the transistor is on and the switching circuit is powered through the second diode by the electromagnetic field when the transistor is off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification