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This lesson talks about the related circuits of the speaker on the MediaTek platform

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Take Redmi K50 as an example

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This circuit is relatively simple

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Compared with Huawei, it lacks the link of large audio

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Let's see what components are in this circuit

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First look to the right

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This is the cable seat, J6501

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The speaker is on the small board

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The tail plug board is connected to the socket J6501 through a cable

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J6501 connects to small audio

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This is the speaker and the connector

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The one in the middle is a small audio

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Its speaker is driven by small audio

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Small audio converts the sound signal from the CPU, and then amplifies the power of the analog signal,

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and finally outputs it to the connector, through the socket and the cable to the small board at the end,

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and then to the speaker

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This constitutes a channel for the speaker signal

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This is small audio

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The far left is the CPU

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The CPU is responsible for the overall control and conversion of the signal in this sound circuit

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The CPU usually transmits data with the chip of the sound circuit through the dedicated bus of the sound circuit

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In fact, there are many other signals between the CPU and the small audio,

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such as the reset signal, the I2C bus

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Regarding its reset, I2C bus, and the power supply of the small audio, we have not drawn it

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Everyone knows that this is the frame diagram.

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This circuit is relatively simple, including CPU, small audio, speakers,

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related seats of speakers, and line channels between these components

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This small audio is an audio power amplifier, referred to as PA

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This is the driver circuit of the speaker of the MediaTek platform Redmi phone

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That's all for this lesson