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ISD5216PI Datasheet(PDF) 41 Page - Winbond |
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ISD5216PI Datasheet(HTML) 41 Page - Winbond |
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41 / 75 page  ISD5216 Publication Release Date: Jan. 31, 2006 - 41 - Revision B.4 7.9. AUTO MUTE AND AUTO GAIN FUNCTIONS During playback, the signal passes through the Automatic Attenuator before it is filtered. The Automatic Attenuator will attenuate all signals at the noise level in order to reduce the noise during quiet pauses. During record, low level input signals are brought up by the Auto Gain function if the configuration bit D7 of CFG0 (AMT0) is set. This improves the signal to noise ratio of recorded low level input signals. If the configuration bit CFG0<7> (AMT0) is set to ZERO, all input levels are recorded with the same gain setting. The attack and release time of the Auto Gain and Auto Mute functions is set by the capacitor on the ACAP pin. The AGC cannot be used if the Auto Gain or Auto Mute function is enabled. Tattack ≈ 0,1504 x Vpeak Trelease ≈ 6.58 x Vpeak @ Cattcap=4.7 μF Vpp Gain (dB) 0 0 -12 Vpp Gain (dB) 0 0 12 Expand Compres Vpp Gain (dB) 0 0 Vpp Gain (dB) 0 0 12 Expand Compres |
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