PTC has been awarded "Light Emitting Diode Driving Circuit and System" in USA.

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PTC has been awarded "METHOD AND APPARATUS FOR DRIVING LIGHT EMITTING DIODE" in USA.

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PTC has been awarded "AUTOMATIC TESTING SYSTEM AND METHOD" in ROC.

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PTC has been awarded "Method for adjusting light brightness using a toggle switch and related illuminant system" in China.

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PTC has been awarded "RECEIVER AND DATA SLICER" in China.

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PTC has been awarded "GAIN CONTROLLING SYSTEM, SOUND PLAYBACK SYSTEM, AND GAIN CONTROLLING METHOD THEREOF" in ROC.

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PTC has been awarded "Power-On Reset Circuit" in ROC.

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PTC has been awarded "Power-On Reset Circuit" in ROC.

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PTC has been awarded "Patent Awarded- Relaxation Oscillatorf" in USA.

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PTC has been awarded "GAIN CONTROLLING SYSTEM, SOUND PLAYBACK SYSTEM, AND GAIN CONTROLLING METHOD THEREOF" in USA.

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