Data communication over power supply lines of an electronic system
View Patent ↗Disclosed are various embodiments for communicating information between various electronic components. A local device may comprise a transmitter to convert communication signals into modulated signals. Modulated signals are injected into a shared power supply line. The remote device may comprise a receiver for identifying the injected signal, demodulating the injected signal, and processing the demodulated signal.
1. A method, comprising:
communicating, by a first circuit, with a second circuit via a communication bus that communicatively couples the first circuit to the second circuit; and
communicating, by the first circuit, with the second circuit via a power supply line connected to the first circuit and the second circuit, wherein
the first circuit and the second circuit are both mounted on a same circuit board, and
the power supply line supplies a voltage to at least one of the first circuit or the second circuit.
2. The method of claim 1 , wherein
the power supply line receives the voltage via a supply pin communicatively coupled to the circuit board.
3. The method of claim 1 , wherein
the first circuit communicates a digital communication signal to the second circuit via the communication bus, the digital communication signal comprising a control signal to facilitate wireless coexistence of a first wireless protocol and a second wireless protocol,
the first circuit facilitating wireless communication for the first wireless protocol, and
the second circuit facilitating wireless communication for the second wireless protocol.
4. The method of claim 1 , wherein
the voltage comprises a direct current (DC) voltage, and
the power supply line is operable to supply the DC voltage to the first circuit and the second circuit.
5. The method of claim 1 , wherein
the first circuit comprises a local oscillator operable to generate data signals for wireless communication according to a wireless communication protocol, and
a carrier frequency is selected to avoid interference with the local oscillator.
6. A system, comprising:
a first circuit that is mounted on a circuit board and connected to a power supply line; and
a second circuit that is mounted on the circuit board and connected to the power supply line, wherein
the power supply line supplies a voltage to at least one of the first circuit or the second circuit,
the first circuit and the second circuit are communicatively coupled via a communication bus, and
the first circuit is configured to communicate with the second circuit via the communication bus and the power supply line.
7. The system of claim 6 , wherein the second circuit is configured to inject a modulated analog communication signal in the power supply line, the modulated analog communication signal comprising the communication information.
8. The system of claim 6 , wherein the first circuit comprises a bandpass filter to filter a power supply signal received via the power supply line to generate a filtered power signal.
9. The system of claim 8 , wherein the first circuit comprises a power supply filter to filter a power supply signal before the voltage is supplied to another portion of the first circuit.
10. The system of claim 6 , wherein
the first circuit is configured to process a communication signal, received via the power supply line, to identify an instruction for controlling the first circuit, and
the instruction facilitates at least one of wireless coexistence, passing of a parameter generated by the second circuit, or power cycling.
11. The system of claim 6 , wherein the first circuit comprises one of a WiFi chip, a Bluetooth chip, a Global Positioning System (GPS) chip, or a baseband processor chip.
12. A system, comprising:
a circuit board,
a first circuit mounted on the circuit board;
a power supply line that supplies a voltage to the first circuit and to a second circuit; and
a communication bus that connects the first circuit to the second circuit, wherein
the second circuit is mounted on the circuit board, and
the first circuit configured is to
receive a communication signal comprising control information via the communication bus,
convert the communication signal into a modulated communication signal, and
inject the modulated communication signal into the power supply line to transmit the control information to the second circuit via the power supply line.
13. The system of claim 12 , wherein
the communication signal facilitates wireless coexistence of a first wireless protocol and a second wireless protocol,
the first circuit facilitates wireless communication for the first wireless protocol, and
the second circuit facilitates wireless communication for the second wireless protocol.
14. The system of claim 12 , wherein the communication signal passes a parameter or data from the first circuit to the second circuit.
15. The system of claim 12 , wherein the communication signal comprises a power cycle state of the first circuit to facilitate power cycling.
16. The system of claim 12 , wherein the first circuit comprises one of a WiFi chip, a Bluetooth chip, a Global Positioning System (GPS) chip, or a baseband processor.
17. The system of claim 12 , wherein the first circuit comprises:
a channel coder that encodes the communication signal to generate an encoded digital communication signal;
a digital to analog converter that converts the encoded digital communication signal to an analog communication signal; and
a modulator that generates the modulated communication signal based on the analog communication signal and a local oscillator signal.
18. The system of claim 6 , wherein
the first circuit communicates with the second circuit via the communication bus when the communication requires a bandwidth greater than a predetermined threshold, and
the first circuit communicates with the second circuit via the power supply line when the communication requires a bandwidth less than the predetermined threshold.
19. The system of claim 6 , wherein
the first circuit communicates control parameters with the second circuit via power supply line.
20. The system of claim 6 , further comprising the circuit board.