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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RT5509WSC датащи(PDF) 21 Page - Richtek Technology Corporation |
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RT5509WSC датащи(HTML) 21 Page - Richtek Technology Corporation |
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21 / 58 page  RT5509 Copyright © 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation DS5509-00 August 2017 www.richtek.com 21 Audio Output Compress ion Filter Attack/De cay Filter Energy Filter. Gain Audio Input AE 1-AE AA 1-AA AD 1-AD ∑ ω Z -1 Alpha Filter Structure Note :Ω = 1-α Figure 15. DRC Structure and Signal Processing Path Speaker Protection Functions Excursion Predict stereo gain in stereo gain out data in data out (from DSP) (to clipper) Sig = u Pilot Data path Control path Lookahead buffer Signal Detect ALC /Lmt Gain Gen. Gain Combining Signal Volume Gain Gen. Excur. SI DCR Calc. Excursion Response i_fb VBAT Clip Ctrl DC resistance Maximum Signal Voltage Figure 16. Block Diagram of SPK Protection Function The following sub-clauses explain the function of each sub-block. Look-Ahead Delay Buffer Look-ahead delay can be programed from 0 up to 480 samples, which is up to 10ms at 48k sampling rate. This delay should contain stereo gain synchronization delay. Gain Processing on the Data Path The level control, limiting for protection, and the volume control are implemented by multiplying the signal on the data path, with the gain generated from the control path. Pilot The pilot signal, with constant magnitude (30mV) is added at the last stage of data path. The frequency of pilot is fixed fp = 50Hz. The pilot is disabled at |
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