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WM8772 数据表(PDF) 12 Page - Wolfson Microelectronics plc |
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WM8772 数据表(HTML) 12 Page - Wolfson Microelectronics plc |
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12 / 70 page  WM8772 Production Data w PD Rev 4.1 October 2004 12 TERMINOLOGY 1. Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output with no signal applied. (No Auto-zero or Automute function is employed in achieving these results). 2. Dynamic range (dB) - DNR is a measure of the difference between the highest and lowest portions of a signal. Normally a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB to it. (e.g. THD+N @ -60dB= -32dB, DR= 92dB). 3. THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal. 4. Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside audio band). 5. Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from the other. Normally measured by sending a full scale signal down one channel and measuring the other. 6. Pass-Band Ripple - Any variation of the frequency response in the pass-band region. |
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