Signal Noise Ratio Control System and Method Thereof
First Claim
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1. A signal-noise ratio control system for reducing noise interference, the signal-noise ratio control system comprising:
- a touch sensor driven by a driving signal and outputting an analog signal according to a plurality of touch statuses;
a touch controller which generates the driving signal and provides a divided voltage according to the analog signals; and
a level shifter which adjusts a voltage level of the driving signal according to the voltage level of the divided voltage.
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Abstract
A signal-noise ratio control system which reduces noise interference includes a touch sensor, a touch controller, and a level shifter. The touch sensor is driven by the driving signal and outputs an analog signal based on the touch situation. The touch controlling IC generates the driving signal and provides the divided voltage based on the analog signals. The level shifter adjusts the voltage level of the driving signal based on the voltage level of the divided voltage.
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Citations
10 Claims
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1. A signal-noise ratio control system for reducing noise interference, the signal-noise ratio control system comprising:
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a touch sensor driven by a driving signal and outputting an analog signal according to a plurality of touch statuses; a touch controller which generates the driving signal and provides a divided voltage according to the analog signals; and a level shifter which adjusts a voltage level of the driving signal according to the voltage level of the divided voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method which controls the signal-noise ratio for reducing noise interference comprising the steps of:
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converting an analog signal into a plurality of original digital signals; analyzing the original digital signals; determining whether a voltage level of a driving signal needs changing according to the analyzing of the original digital signals; selecting a new divided voltage when the voltage level of the driving signal needs changing; adjusting the voltage level of the driving signal according to the new divided voltage or an original divided voltage; and driving a touch sensor with the driving signal. - View Dependent Claims (8, 9, 10)
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Specification