WM8980CGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM8980CGEFL/RV Datasheet - Page 116

• Manufacturer Part Number: WM8980CGEFL/RV
• Description: Stereo CODEC with Speaker Driver and Video Buffer
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8980
5-BAND EQUALISER
Figure 65 EQ Band 1 Low Frequency Shelf Filter Cut-offs
Figure 67 EQ Band 2 – Peak Filter Centre Frequencies,
Figure 69 EQ Band 2 – EQ2BW=0, EQ2BW=1
w
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Frequency (Hz)
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The WM8980 has a 5-band equaliser which can be applied to either the ADC path or the DAC path.
The plots from Figure 65 to Figure 78 show the frequency responses of each filter with a sampling
frequency of 48kHz, firstly showing the different cut-off/centre frequencies with a gain of 12dB, and
secondly a sweep of the gain from -12dB to +12dB for the lowest cut-off/centre frequency of each
filter.
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Figure 66 EQ Band 1 Gains for Lowest Cut-off Frequency
Figure 68
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EQ Band 2 – Peak Filter Gains for Lowest Cut-off
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PP, Rev 3.8, May 2012
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Pre-Production
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