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US 8,476,909 B2Granted
Current calibration method and associated circuit
AssigneeMStar Semiconductor, Inc.
InventorsChih-Tien Chang, Ju-Ming Chou
Life of this patent
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Abstract
A current calibration method and the associated control circuit are provided. The method includes: providing a predetermined voltage to the differential output for obtaining an accurate current passing through the panel resistor during a calibration procedure and, providing a driving current to the differential output according to the accurate current during a normal operation procedure.
Claims8
A control circuit, capable of calibrating a current, comprising:
- an adjustable current generator that converts a reference current into a driving current according to a current control signal;
- an output driver, with a differential output connected to an external precision resistor, that receives the driving current and generates a differential signal at the differential output utilizing the driving current according to a data signal;
- a comparison apparatus, coupled to the output driver, that generates a comparison output signal according to a reference voltage and the differential signal;
- and
- a processing circuit that controls the current control signal according to the comparison output signal to calibrate the driving current.
2 more elements
Dependencies are inferred from the claim text.