Unidirectional power and bi-directional data transfer over a single inductive coupling
First Claim
1. An inductive transmission system for inductive transmission of power and full duplex data signals between a first device and a second device, comprising:
- a bidirectional inductive channel between the first device and the second device,first transmission means for transmitting a power signal at a first frequency from the first device to the second device over the inductive channel,a first modulating device for modulating a first data signal at a first modulation frequency,a second modulating device for modulating a second data signal at a second modulation frequency,second transmission means for transmitting the modulated first data signals from the first device to the second device over the inductive channel, and for transmitting the modulated second data signals from the second device to the first device over the inductive channel,wherein the first modulation frequency and the second modulation frequency are an even factor apart, wherein the transmission system furthermore comprises detection means for demodulating the first data signal at the first device and demodulating the second data signal at the second device and signal cancellation means for cancellation of the first data signal from the second data signal received at the first device and cancellation of the second data signal from the first data signal received at the second device.
1 Assignment
0 Petitions
Accused Products
Abstract
An inductive transmission system for inductive transmission of power and full duplex data signals between first and second devices. The transmission system includes a bi-directional inductive channel between the two devices; a transmitter for transmitting a power signal at a first frequency from the first device to the second device over the inductive channel; a first modulating device for modulating a first data signal at a first modulation frequency; and a second modulating device for modulating a second data signal at a second modulation frequency. Further transmitters transmit the modulated first data signals from the first device to the second device over the inductive channel, and transmits the modulated second data signals from the second device to the first device over the inductive channel. The first modulation frequency and the second modulation frequency are at least a factor two apart.
89 Citations
14 Claims
-
1. An inductive transmission system for inductive transmission of power and full duplex data signals between a first device and a second device, comprising:
-
a bidirectional inductive channel between the first device and the second device, first transmission means for transmitting a power signal at a first frequency from the first device to the second device over the inductive channel, a first modulating device for modulating a first data signal at a first modulation frequency, a second modulating device for modulating a second data signal at a second modulation frequency, second transmission means for transmitting the modulated first data signals from the first device to the second device over the inductive channel, and for transmitting the modulated second data signals from the second device to the first device over the inductive channel, wherein the first modulation frequency and the second modulation frequency are an even factor apart, wherein the transmission system furthermore comprises detection means for demodulating the first data signal at the first device and demodulating the second data signal at the second device and signal cancellation means for cancellation of the first data signal from the second data signal received at the first device and cancellation of the second data signal from the first data signal received at the second device. - View Dependent Claims (2, 3, 4, 5, 6, 10, 11, 12)
-
-
7. A method for inductive transmission of power and full duplex data signals between a first device and a second device, comprising the acts of:
-
transmitting power signals from the first device to the second device at a first frequency over an inductive channel, transmitting first data signals modulated at a second frequency from the first device to the second device over the inductive channel, transmitting second data signals modulated at a third frequency from the second device to the first device over the inductive channel, the second and third frequency being an even factor apart, demodulating the first data signal and the second data signal on the first device side respectively second device side, demodulating the second data signal at the second device, canceling the first data signal from the second data signal received at the first device at the first device respectively second device, and canceling the second data signal from the first data signal received at the second device. - View Dependent Claims (8, 9, 13, 14)
-
Specification