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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TDA7412 데이터시트(PDF) 15 Page - STMicroelectronics |
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TDA7412 데이터시트(HTML) 15 Page - STMicroelectronics |
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15 / 56 page  15/56 TDA7412 1.6 SoftStep-Volume and Speaker When the volume-level is changed audible clicks could appear at the output. The root cause of those clicks could either be a DC-Offset before the volume-stage or the sudden change of the envelope of the audiosignal. With the SoftStep-feature both kinds of clicks could be reduced to a minimum and are no more audible. The blend-time from one step to the next is programmable in four steps. Figure 6. SoftStep-Timing Note: For steps more than 0.5dB (Volume) /1dB (speaker) the SoftStep mode should be deactivated because it could generate a hard 1dB step during the blend-time. 1.7 Bass There are four parameters programmable in the bass stage: 1.7.1 Attenuation Figure 7 shows the attenuation as a function of frequency at a center frequency of 80Hz. Figure 7. Bass Control @ fC = 80Hz, Q = 1 1dB 0.5dB -0.5dB -1dB Time D00AU1170 VOUT SS Time -15.0 -10.0 -5.0 0.0 5.0 10.0 15.0 10.0 100.0 1.0K 10.0K dB Hz |
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