Startup circuit and high speed cable using the same
OwnerJohn Martin Horan, David McGowaninventors
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Abstract
A system for providing a power signal of a predetermined voltage to an input of a High Definition Multimedia Interface (HDMI) sink device is provided. The system includes an electronic device, generating HDMI signals transmitted on at least one differential signal line to another input of the HDMI sink device, and a startup circuit, providing the power signal of the predetermined voltage. The startup circuit includes a power harvesting circuit for obtaining an electrical power of a lower voltage, lower than the predetermined voltage, from at least one of the HDMI signals on the another input, and a voltage raiser circuit increasing the lower voltage to the predetermined voltage. A corresponding electronic cable containing the start-up circuit is also provided.
Claims20
A system for providing a power signal of a predetermined voltage to an input of a High Definition Multimedia Interface (HDMI) sink device, the system comprising:
- an electronic device, generating HDMI signals transmitted on at least one differential signal line to another input of the HDMI sink device;
- and
- a startup circuit, providing the power signal of the predetermined voltage, comprising:
- a power harvesting circuit for obtaining an electrical power of a lower voltage, lower than the predetermined voltage, from at least one of the HDMI signals on the another input;
- and
- a voltage raiser circuit increasing the lower voltage to the predetermined voltage.
A cable for connecting a transmitting data source device to a receiving data sink device, and for carrying a high speed differential data signal over a differential signal line, and an auxiliary signal over an auxiliary signal line, the cable comprising:
- an electronic device coupled to the receiving data sink device;
- and
- a startup circuit for supplying a power signal of a predetermined voltage to the electronic device, comprising:
- a power harvesting driver for obtaining an electrical power of a lower voltage, lower than the predetermined voltage, from the differential signal line coupled to the electronic device and powered by the electronic device;
- and
- a voltage raiser circuit for increasing the lower voltage to the predetermined voltage.
A cable, connecting a High Definition Multimedia Interface (HDMI) transmitter to a HDMI re-ceiver, and carrying HDMI signals over differential signal lines, and auxiliary signals over auxiliary signal lines, the cable comprising:
- a circuitry for providing a power signal of a predetermined voltage to an input of the HDMI re-ceiver, comprising:
- an electronic device, generating HDMI signals transmitted on at least one differential signal line to another input of the HDMI receiver;
- and
- a startup circuit, providing the power signal of the predetermined voltage, comprising:
- a power harvesting circuit for obtaining an electrical power of a lower voltage, lower
- than the predetermined voltage, from at least one of the HDMI signals on the another input;
- and
- a voltage raiser circuit increasing the lower voltage to the predetermined voltage,
- and supplying the predetermined voltage to the input of the HDMI receiver.
Dependencies are inferred from the claim text.