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US 8,299,771 B2Granted
Methods and systems for driving a load
AssigneeInfineon Technologies AG
InventorsKyle Shawn Williams, Joseph Funyak
Life of this patent
Estimating the term…
Abstract
In one embodiment, a circuit can selectively adjust a current for driving a load. The circuit includes a sensor configured to measure a magnetic field associated with the current and provide a sensor voltage representative thereof. A control circuit is configured to selectively adjust the current as a function of the sensor voltage and a time-varying voltage threshold. Other methods and systems are also disclosed.
Claims4
A circuit to selectively adjust a current for driving a load, comprising:
- a sensor configured to measure a magnetic field associated with the current and provide a sensor voltage representative thereof;
- a control circuit configured to selectively adjust the current as a function of the sensor voltage and a time-varying voltage threshold;
- and
- a timing circuit, the timing circuit comprising:
- an oscillator;
- a serial to parallel interface (SPI);
- a dither module having an first input coupled to an output of the oscillator and having a second input coupled to the SPI;
- an average current block having an input coupled to the SPI;
- and
- a hysteresis block having an input coupled to the SPI.
7 more elements
Dependencies are inferred from the claim text.