Calibration device and calibration method
A technology of a correction device and a correction method, which are applied in the directions of disc-shaped record carriers, beam sources, instruments, etc., can solve the problems of laser diode error power control, write enable signal distortion, Gray code error decoding, etc.
Inactive Publication Date: 2016-01-13
MEDIATEK INC
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Problems solved by technology
However, if there are non-ideal effects on the controller chip itself, the optical pickup unit itself, and / or the interface between the controller chip and the optical selection unit, one or more write enable signals may be Distorted
For example, misalignment between write-enable signals can cause the transmitted Gray code to be mis-decoded at the optical pick-up unit, thus causing wrong power control of the laser diode
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[0030] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that electronic device manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means. .
[0031] The main concept of the invention is to ...
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The invention provides a calibration device and a calibration method. The calibration device includes a detection circuit and a calibration circuit. The detection circuit generates a detection result by detecting the relationship between the edges of the multiple signals generated by the multiple signal sources, wherein at least one of the multiple edges is a negative edge. The correction circuit is coupled to the detection circuit, and corrects at least one signal source according to the detection result. The correction method comprises the following steps: generating a detection result by detecting the relationship between edges of multiple signals generated by multiple signal sources, wherein at least one of the multiple edges is a negative edge; Calibrate at least one signal source in the multiple signal sources. The correction device and the related correction method provided by the present invention can correct the signal source to compensate the distortion caused by the undesirable effect in the transmitted signal.
Description
technical field [0001] The present invention relates to correcting the signal transmitted from the transmitter end to the receiver end, in particular to a phase detection / edge distance detection for the signal transmitted from the transmitter end to the receiver end Calibration device and related calibration method. Background technique [0002] For some applications, the transmitter chip communicates with the receiver chip through multiple transmission lines. Therefore, the transmitter chip transmits multiple signals simultaneously to transmit control information or data information to the receiver chip. Taking an optical storage device as an example, the controller chip can generate multiple write enable (WEN) signals through multiple channels between the controller chip and the optical pick-up unit (OPU) to control The laser power of the laser diode provided on the optical reading unit, wherein the gray code (graycode) for laser power control has a plurality of bits, whi...
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IPC IPC(8): G11B7/126
CPCG11B7/126G11B20/10222G11B2220/2537H03K5/26
Inventor 张又文湛益淞杨金彬马昌博
Owner MEDIATEK INC