Power bridge circuit for bi-directional inductive signaling
First Claim
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1. A wireless signal interface comprising:
- a coil assembly including one or more coils;
a bridge circuit coupled to the coil assembly to operate in a first mode or a second mode, the bridge circuit to enable power to be transmitted using the one or more coils in the first mode and power to be received using the one or more coils in the second mode; and
control circuitry to generate one or more control signals to selectively configure the bridge circuit to operate in the first mode to enable the wireless signal interface to transmit power or in the second mode to enable the wireless signal interface to receive power.
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Abstract
An inductive signal interface comprises a coil assembly including one or more inductive coils, a bridge circuit including a plurality of switches, and control circuitry. The control circuitry is configured to individually operate the plurality of switches to enable the inductive signal interface to dynamically switch between a power-transmit mode and a power receive mode.
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Citations
19 Claims
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1. A wireless signal interface comprising:
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a coil assembly including one or more coils; a bridge circuit coupled to the coil assembly to operate in a first mode or a second mode, the bridge circuit to enable power to be transmitted using the one or more coils in the first mode and power to be received using the one or more coils in the second mode; and control circuitry to generate one or more control signals to selectively configure the bridge circuit to operate in the first mode to enable the wireless signal interface to transmit power or in the second mode to enable the wireless signal interface to receive power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A mobile computing device comprising:
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a power source; and an inductive signal interface including an input to receive an input direct current signal and an output to transmit an output direct current signal, the inductive signal interface comprising; a coil assembly including one or more coils; a bridge circuit coupled to the coil assembly to operate in a first mode or a second mode; control circuitry to generate one or more control signals to selectively configure the bridge circuit to operate in the first mode to enable the inductive signal interface to transmit power or in the second mode to enable the inductive signal interface to receive power; and wherein the control circuitry includes a current sensing element coupled to the bridge circuit, the input, and the output, the current sensing element to measure a first current between the input and the bridge circuit, a second current between the bridge and the output, and a third current between the input and the output. - View Dependent Claims (16, 17, 18)
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19. A system comprising:
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a first device; and a mobile computing device to inductively couple to the first device, the mobile computing device comprising; a power source; and an inductive signal interface including an input to receive an input direct current signal and an output to transmit an output direct current signal, the inductive signal interface comprising; a coil assembly including one or more coils; a bridge circuit coupled to the coil assembly to operate in a first mode or a second mode; control circuitry to generate one or more control signals to selectively configure the bridge circuit to operate in the first mode to enable the inductive signal interface to transmit power to the first device or in the second mode to enable the inductive signal interface to receive power from the first device; and wherein the control circuitry includes a current sensing element coupled to the bridge circuit, the input, and the output, the current sensing element to measure a first current between the input and the bridge circuit, a second current between the bridge and the output, and a third current between the input and the output.
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Specification