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Update touch_sensor_design_en.md (AEGHB-376) #293

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Expand Up @@ -601,7 +601,7 @@ Common sliders are V-shaped, double-V-shaped or zigzag-shaped.

#### 3.3.13. Matrix Button Design

If the application requires a high number of buttons and there are no enough IO pins, matrix button design can be used to allow more buttons than there are IO pins.
If the application requires a high number of buttons and there are not enough IO pins, matrix button design can be used to allow more buttons than there are IO pins.

An m×n matrix requires m+n touch sensors. A matrix button design consists of two groups of capacitive sensors: Row sensors and Column sensors, as shown below:

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