Datenblatt-Suchmaschine für elektronische Bauteile |
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TPA2016D2RTJT Datenblatt(PDF) 11 Page - Texas Instruments |
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TPA2016D2RTJT Datenblatt(HTML) 11 Page - Texas Instruments |
11 / 39 page APPLICATION INFORMATION AUTOMATIC GAIN CONTROL TPA2016D2 www.ti.com........................................................................................................................................................ SLOS524D – JUNE 2008 – REVISED AUGUST 2009 The Automatic Gain Control (AGC) feature provides continuous automatic gain adjustment to the amplifier through an internal PGA. This feature enhances the perceived audio loudness and at the same time prevents speaker damage from occurring (Limiter function). The AGC function attempts to maintain the audio signal gain as selected by the user through the Fixed Gain, Limiter Level, and Compression Ratio variables. Other advanced features included are Maximum Gain and Noise Gate Threshold. Table 1 describes the function of each variable in the AGC function. Table 1. TPA2016D2 AGC Variable Descriptions VARIABLE DESCRIPTION Maximum Gain The gain at the lower end of the compression region. Fixed Gain The normal gain of the device when the AGC is inactive. The fixed gain is also the initial gain when the device comes out of shutdown mode or when the AGC is disabled. Limiter Level The value that sets the maximum allowed output amplitude. Compression Ratio The relation between input and output voltage. Noise Gate Threshold Below this value, the AGC holds the gain to prevent breathing effects. Attack Time The minimum time between two gain decrements. Release Time The minimum time between two gain increments. Hold Time The time it takes for the very first gain increment after the input signal amplitude decreases. Copyright © 2008–2009, Texas Instruments Incorporated 11 Product Folder Link(s): TPA2016D2 |
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