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HA12228F Datasheet(PDF) 11 Page - Renesas Technology Corp |
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HA12228F Datasheet(HTML) 11 Page - Renesas Technology Corp |
11 / 49 page HA12228F/HA12229F Rev.2.00 Jun 15, 2005 page 11 of 48 The Sensitivity Adjustment of Music Sensor Adjusting MS Amp. gain by external resistor, the sensitivity of music sensor can set up. The music sensor block diagram is shown in figure 4, and frequency response is shown in figure 5. − + − + TAI(R) TAI(L) Note: The impedance of MSI is 100k Ω. C8 0.01 µF C6 0.33 µF R11 330k Ω MSOUT REX2 CEX2 REX1 CEX1 MS SER MS REP MS Amp. ×1 MS DET MA OUT MSI 100k Ω 90k Ω + LPF DET VCC DVCC L/R signal addition 25kHz 20dB −6dB ×1 + GND RL IL Micro computer Figure 4 Music Sensor Block Diagram GV2 GV1 10 100k 25k 10k 1k f3 f4 f2 f1 f (Hz) 100 Repeat mode Search mode Figure 5 Frequency Response |
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