AN_DESIGN_SIM300D.pdf
3.The digital GND and analog GND can be connected by single point in some main board designs of the handset. This can reduce the RF noise in the audio signal. Showed in the following figure, the yellow part is analog GND, the others is trace and digital GND. The white flag is the single point connection between the digital GND and the analog GND by copper plane.
Figure 3: Layout about analogy GND and digital GND
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Не можна втрачати надію. Не можна здаватися до останньої миті. Можливо саме вона, остання мить, принесе весну, яка стане початком нового життя.
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