Optical power for electronic circuits using a single photovoltaic component
View Patent ↗Optical power uses light to run remote, isolated circuits without metallic wires. An optical power system may include a single photovoltaic component that supplies a first voltage in response to impingement of light on the photovoltaic component. A voltage booster receives the first voltage from the photovoltaic component and supplies a second voltage signal at a second voltage that is greater than the first voltage. The optical power system may be integrated with a sensor that is powered by the second voltage from the voltage booster. The photovoltaic component may be an inexpensive light emitting diode.
1. An optical power system, comprising:
a single photovoltaic component that supplies a first voltage in response to impingement of light on the photovoltaic component, wherein the single photovoltaic component is a single diode;
a voltage booster coupled to the photovoltaic component that receives the first voltage from the photovoltaic component and generates a second voltage that is greater than the first voltage, wherein the voltage booster is powered using only the first voltage from the single photovoltaic component, and wherein the first voltage is greater than 1 volt.
2. The optical power system according to claim 1 , wherein the photovoltaic component is a light emitting diode.
3. The optical power system according to claim 2 , wherein the light emitting diode includes a fiber optic connection.
4. The optical power system according to claim 1 , wherein the voltage booster is a charge pump type DC-to-DC step-up converter.
5. The optical power system according to claim 1 , wherein the voltage booster is an inductor type DC-to-DC step-up converter.
6. The optical power system according to claim 5 , wherein the inductor type DC-to-DC step-converter operates for a time after the first voltage is turned off.
7. The optical power system according to claim 1 , wherein the first voltage is less than 3 volts and the second voltage is greater than 3 volts.
8. The optical power system according to claim 1 , wherein the voltage booster includes a digital output that indicates a state of the light impinging on the photovoltaic component.
9. A sensor system, comprising:
a single photovoltaic component that supplies a first voltage in response to impingement of light on the photovoltaic component, wherein the single photovoltaic component is a single diode;
a voltage booster coupled to the photovoltaic component that receives the first voltage from the photovoltaic component and supplies a second voltage that is greater than the first voltage, wherein the voltage booster is powered using only the first voltage from the single photovoltaic component, and wherein the first voltage is greater than 1 volt; and
a circuit coupled to the voltage booster that receives the second voltage, wherein the second voltage is sufficient to power the circuit.
10. The sensor system according to claim 9 , wherein the photovoltaic component is a light emitting diode.
11. The sensor system according to claim 9 , wherein the circuit is a sensor.
12. The sensor system according to claim 11 , wherein the sensor is a fuel tank pressure sensor.
13. The sensor system according to claim 9 , wherein the circuit includes a communication system.
14. The sensor system according to claim 13 , wherein the communication system recognizes a light modulated communication signal.
15. The sensor system according to claim 9 , further comprising:
a housing, wherein the photovoltaic component, the voltage booster and the circuit are disposed in the housing.
16. The sensor system according to claim 9 , wherein light is supplied to the photovoltaic component via a fiber optic connection.
17. The sensor system according to claim 9 , wherein the voltage booster is a charge pump type DC-to-DC step-up converter.
18. The sensor system according to claim 9 , wherein the voltage booster is an inductor type DC-to-DC step-up converter.
19. The sensor system according to claim 18 , wherein the inductor type DC-to-DC step-converter operates for a time after the first voltage is turned off.
20. The sensor system according to claim 9 , wherein the first voltage is less than 3 volts and the second voltage is greater than 3 volts, and wherein the circuit requires at least approximately 3 volts to be powered.
21. The sensor system according to claim 9 , wherein the voltage booster includes a digital output that indicates a state of the light impinging on the photovoltaic component.
22. A method for optically powering a circuit, comprising:
positioning a single photovoltaic component to receive impinging light, wherein the photovoltaic component supplies a first voltage in response to the impinging light, and wherein the single photovoltaic component is a single diode;
coupling a voltage booster to the photovoltaic component, wherein the voltage booster receives the first voltage and supplies a second voltage that is greater than the first voltage, and wherein the voltage booster is powered using only the first voltage from the single photovoltaic component, and wherein the first voltage is greater than 1 volt; and
coupling the circuit to the voltage booster, wherein the circuit is powered by the second voltage.
23. The method according to claim 22 , wherein the photovoltaic component is a light emitting diode.
24. The method according to claim 22 , wherein the circuit is a fuel tank sensor.
25. The method according to claim 22 , further comprising:
modulating the impinging light to communicate with the circuit.