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US 8,948,280 B2Granted
Clock determination for a sensor
AssigneeInfineon Technologies AG
InventorsDirk Hammerschmidt, Friedrich Rasbornig, Bernhard Schaffer, Michael Strasser, Wolfgang Scherr
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Abstract
A method for determining a clock for a sensor signal which has a synchronization signal, which method involves a control unit measuring the period between a first edge and a second edge of the synchronization signal, wherein both edges are either rising or falling, and the control unit taking the period as a basis for determining a clock for sampling data in the sensor signal.
Claims24
A method for determining a clock of a sensor, the method comprising:
- transmitting a synchronization signal by a sensor in response to a trigger signal sent by a control unit;
- receiving the synchronization signal by the control unit;
- measuring, by the control unit, a period between a first edge and a second edge of the synchronization signal, wherein the edges are either rising or falling;
- determining, by the control unit, a local clock of the sensor from the period;
- and
- using, by the control unit, the local clock to sample data in a data signal received by the control unit from the sensor.
3 more elements
A control unit system comprising:
- a transmitter configured to send signals including a trigger signal to a sensor to provide at synchronization signal;
- a receiver configured to receive signals including the synchronization signal from the sensor;
- a timing circuit configured to determine a local sensor clock based on a period of a synchronization signal received from the sensor, wherein the timing circuit is configured to measure the period between a first edge and a second edge of the synchronization signal, and wherein both edges are either rising or falling;
- and
- a sampling circuit configured to sample, on the local sensor clock, a data signal to be received from the sensor.
2 more elements
A sensor system comprising:
- a sensor;
- a clock generator configured to generate a clock in the sensor system;
- a receiver configured to receive a trigger signal from a control unit separate from the sensor system;
- and
- a transmitter configured to send signals from the sensor system to the control unit in response to the trigger signal from the control unit, wherein the transmitter is configured to send a synchronization signal based on the dock, and wherein a period between a first edge and a second edge of the synchronization signal is dependent on the clock and both edges are either rising or falling.
2 more elements
Dependencies are inferred from the claim text.