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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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TDA7718B 数据表(PDF) 16 Page - STMicroelectronics |
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TDA7718B 数据表(HTML) 16 Page - STMicroelectronics |
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16 / 40 page  Description of the audioprocessor TDA7718B 16/40 DocID18305 Rev 3 4.2.3 High frequency boost Figure 6 shows the different Loudness shapes in low and high frequency boost. Figure 6. Loudness attenuation, fc = 2.4 kHz 4.2.4 Flat mode In flat mode the loudness stage works as a 0 dB to -15 dB attenuator. 4.3 Soft-mute The digitally controlled soft-mute stage allows muting/demuting the signal with a I2C bus programmable slope. The mute process can either be activated by the soft-mute pin or by the I2C bus. This slope is realized in a special S-shaped curve to mute slow in the critical regions (see Figure 7). For timing purposes the bit 0 of the I2C bus output register is set to 1 from the start of muting until the end of demuting. Figure 7. Soft-mute timing Note: Please notice that a started mute-action is always terminated and could not be interrupted by a change of the mute –signal. |
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