COMMUNICATION APPARATUS AND OPERATION METHOD THEREOF
First Claim
1. A communication apparatus comprising:
- a communication coil;
a power receiving portion;
a charge control portion;
a first switch portion;
a second switch portion;
a communication circuit; and
a processor,wherein the communication coil receives a transmission signal transmitted from another communication apparatus;
wherein the power receiving portion generates a power-supply voltage from the transmission signal received by the communication coil;
wherein the charge control portion is connectable to a secondary cell;
wherein the charge control portion is capable of charging the secondary cell using the power-supply voltage;
wherein the communication coil is coupled to a transmission/reception terminal of the communication circuit via the second switch portion;
wherein the processor is coupled to the communication circuit;
wherein a first terminal of the first switch portion is supplied with the power-supply voltage;
wherein a second terminal of the first switch portion is capable of being supplied with battery voltage;
wherein a third terminal of the first switch portion couples with the communication circuit;
wherein the power receiving portion includes a voltage detection circuit responding to terminal voltage of the communication coil;
wherein the voltage detection circuit generates a first control signal of a first state when the terminal voltage of the communication coil exceeds a specified power supply threshold voltage;
wherein the first switch portion is controlled to turn on between the first terminal and the third terminal in response to the first control signal of the first state;
wherein the voltage detection circuit generates the first control signal of a second state different from the first state when the terminal voltage of the communication coil does not exceed the specified power supply threshold voltage;
wherein the first switch portion is controlled to turn on between the second terminal and the third terminal in response to the first control signal of the second state;
wherein the voltage detection circuit generates the second control signal of a third state during a period to charge the secondary cell when the terminal voltage of the communication coil exceeds a charge threshold voltage higher than the specified power supply threshold voltage;
wherein the second switch portion is controlled to turn off in response to the second control signal of the third state;
wherein the voltage detection circuit generates the second control signal of a fourth state different from the third state when the terminal voltage of the communication coil does not exceed the charge threshold voltage higher than the specified power supply threshold voltage;
wherein the second switch portion is controlled to turn on in response to the second control signal of the fourth state; and
wherein the communication circuit is capable of communicating with the other communication apparatus during a period in which the second switch portion is controlled to turn on.
2 Assignments
0 Petitions
Accused Products
Abstract
A communication apparatus includes a communication coil, a power receiving portion, a charge control portion, a first switch portion, a second switch portion, a communication circuit, and a processor. A voltage detection circuit of the power receiving portion generates first control signal of first state when a terminal voltage of the communication coil exceeds power supply threshold voltage. The first switch portion is controlled to turn on between first terminal and third terminal in response to first control signal. The voltage detection circuit generates second control signal of third state when a terminal voltage of the communication coil exceeds first and second charge threshold voltages during a period to charge the secondary cell. The second switch portion is controlled to turn off in response to second control signal.
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Citations
20 Claims
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1. A communication apparatus comprising:
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a communication coil; a power receiving portion; a charge control portion; a first switch portion; a second switch portion; a communication circuit; and a processor, wherein the communication coil receives a transmission signal transmitted from another communication apparatus; wherein the power receiving portion generates a power-supply voltage from the transmission signal received by the communication coil; wherein the charge control portion is connectable to a secondary cell; wherein the charge control portion is capable of charging the secondary cell using the power-supply voltage; wherein the communication coil is coupled to a transmission/reception terminal of the communication circuit via the second switch portion; wherein the processor is coupled to the communication circuit; wherein a first terminal of the first switch portion is supplied with the power-supply voltage; wherein a second terminal of the first switch portion is capable of being supplied with battery voltage; wherein a third terminal of the first switch portion couples with the communication circuit; wherein the power receiving portion includes a voltage detection circuit responding to terminal voltage of the communication coil; wherein the voltage detection circuit generates a first control signal of a first state when the terminal voltage of the communication coil exceeds a specified power supply threshold voltage; wherein the first switch portion is controlled to turn on between the first terminal and the third terminal in response to the first control signal of the first state; wherein the voltage detection circuit generates the first control signal of a second state different from the first state when the terminal voltage of the communication coil does not exceed the specified power supply threshold voltage; wherein the first switch portion is controlled to turn on between the second terminal and the third terminal in response to the first control signal of the second state; wherein the voltage detection circuit generates the second control signal of a third state during a period to charge the secondary cell when the terminal voltage of the communication coil exceeds a charge threshold voltage higher than the specified power supply threshold voltage; wherein the second switch portion is controlled to turn off in response to the second control signal of the third state; wherein the voltage detection circuit generates the second control signal of a fourth state different from the third state when the terminal voltage of the communication coil does not exceed the charge threshold voltage higher than the specified power supply threshold voltage; wherein the second switch portion is controlled to turn on in response to the second control signal of the fourth state; and wherein the communication circuit is capable of communicating with the other communication apparatus during a period in which the second switch portion is controlled to turn on. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a communication apparatus including a communication coil, a power receiving portion, a charge control portion, a first switch portion, a second switch portion, a communication circuit, and a processor, the method comprising:
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wherein the communication coil receives a transmission signal transmitted from another communication apparatus; wherein the power receiving portion generates a power-supply voltage from the transmission signal received by the communication coil; wherein the charge control portion is connectable to a secondary cell; wherein the charge control portion is capable of charging the secondary cell using the power-supply voltage; wherein the communication coil is coupled to a transmission/reception terminal of the communication circuit via the second switch portion; wherein the processor is coupled to the communication circuit; wherein a first terminal of the first switch portion is supplied with the power-supply voltage; wherein a second terminal of the first switch portion is capable of being supplied with battery voltage; wherein a third terminal of the first switch portion couples with the communication circuit; wherein the power receiving portion includes a voltage detection circuit responding to terminal voltage of the communication coil; wherein the voltage detection circuit generates a first control signal of a first state when the terminal voltage of the communication coil exceeds a specified power supply threshold voltage; wherein the first switch portion is controlled to turn on between the first terminal and the third terminal in response to the first control signal of the first state; wherein the voltage detection circuit generates the first control signal of a second state different from the first state when the terminal voltage of the communication coil does not exceed the specified power supply threshold voltage; wherein the first switch portion is controlled to turn on between the second terminal and the third terminal in response to the first control signal of the second state; wherein the voltage detection circuit generates the second control signal of a third state during a period to charge the secondary cell when the terminal voltage of the communication coil exceeds a charge threshold voltage higher than the specified power supply threshold voltage; wherein the second switch portion is controlled to turn off in response to the second control signal of the third state; wherein the voltage detection circuit generates the second control signal of a fourth state different from the third state when the terminal voltage of the communication coil does not exceed the charge threshold voltage higher than the specified power supply threshold voltage; wherein the second switch portion is controlled to turn on in response to the second control signal of the fourth state; and wherein the communication circuit is capable of communicating with the other communication apparatus during a period in which the second switch portion is controlled to turn on. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification