Communication with current detection
View Patent ↗Apparatuses and methods are disclosed for communications using current detection. According to one embodiment, a transmitter generates a signal on a transmission line by switching between two power sources. According to one embodiment, the transmitted signal is a balanced signal. Under an embodiment, a signal that has been transmitted on the transmission line is received by a receiver that includes a current detector, and the receiver detects the signal by sensing changes in current on the transmission line. According to one embodiment, the current detector includes a sensor that senses changes in the magnetic field generated by changes in current in the transmission line.
1. A method comprising:
connecting a transmitter to a transmission line;
receiving a digital input signal comprising a plurality of bits; and
transmitting the input signal on the transmission line by switching between a first power source and a second power source to generate a balanced current signal, the first power source comprising a direct current voltage source and the second power source comprising a sinusoidal waveform generator and the direct current voltage source.
2. The method of claim 1 , wherein the balanced current signal comprises a positive domain image and a negative domain image and wherein the negative domain image is inverted from the positive domain image.
3. The method of claim 1 , wherein the transmission line is a twisted pair cable.
4. The method of claim 1 , wherein the sinusoidal waveform generator includes a direct current voltage offset.
5. A transmitter comprising:
a connection to a transmission line;
a plurality of power sources, the plurality of power sources comprising a first power source and a second power source, the first power source comprising a direct current voltage source, the second power source comprising a sinusoidal waveform generator and the direct current voltage source; and
a switch, wherein the switch is coupled to the plurality of power sources and wherein the switch generates a balanced current signal by switching between the plurality of power sources, the balanced current signal representing a digital bitstream.
6. The transmitter of claim 5 , wherein the balanced current signal comprises a positive domain image and a negative domain image and wherein the negative domain image is inverted from the positive domain image.
7. The transmitter of claim 5 , wherein the transmission line is a twisted pair cable.
8. The transmitter of claim 5 , wherein the sinusoidal waveform generator includes a direct current voltage offset.