Device for reducing power consumption of optical drive and method for the same
AssigneeMedia Tek Inc.
InventorsChao-Hsin TSENG, Hsu-Feng HO
Life of this patent
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Abstract
A device and method for reducing power consumption of an optical drive are proposed. The present invention samples a carrier control signal and then compares the samples of the signals with predetermined threshold signals. According to the comparison result, the present invention produces at least one diphase excitation control signal. The diphase excitation control signal comprises at least one impulse signal, and a negative edge of the impulse signal is adjusted to a predetermined level during the period of the diphase excitation control signal. The present invention reduces the time for outputting the control signals and greatly reduces the power consumption of the optical drive thereby.
Claims19
A device for reducing power consumption of an optical drive, comprising:
- a signal controller for producing a carrier control signal;
- a signal processor for sampling the carrier control signal to produce a first output signal;
- a comparator for receiving the first output signal of the signal processor, and comparing the first output signal with at least one threshold signal to produce a second output signal;
- and
- a waveform generator for producing at least one diphase excitation control signal according to the second output signal, wherein the diphase excitation control signal comprises at least one impulse signal, and a negative edge of the impulse signal is adjusted to a predetermined level during the period of the diphase excitation control signal.
A method for reducing power consumption of an optical drive, comprising:
- inputting a carrier control signal to a signal processor;
- sampling the carrier control signal to obtain a sampled carrier control signal by using the signal processor;
- inputting the sampled carrier control signal to a comparator and comparing the sampled carrier control signal with at least one threshold signal by using the comparator;
- producing an output signal index according to a comparison result provided by the comparator;
- and
- outputting at least one diphase excitation control signal according to the output signal index by using a waveform generator, wherein the diphase excitation control signal comprises at least one impulse signal, and a negative edge of the impulse signal is adjusted to a predetermined level during the period of the diphase excitation control signal.
Dependencies are inferred from the claim text.