WM8976 datasheet(102/108 Pages) WOLFSON

102 / 108 page

WM8976

Pre-Production

PP Rev 3.0 April 2006

102

5-BAND EQUALISER

The WM8976 has a 5-band equaliser which can be applied to either the ADC path or the DAC path.

The plots from Figure 50 to Figure 63 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.

-1

-15

-10

-5

Frequency (Hz)

-1

-15

-10

-5

Frequency (Hz)

Figure 50 EQ Band 1 Low Frequency Shelf Filter Cut-offs

Figure 51 EQ Band 1 Gains for Lowest Cut-off Frequency

-1

-15

-10

-5

Frequency (Hz)

-1

-15

-10

-5

Frequency (Hz)

Figure 52 EQ Band 2 – Peak Filter Centre Frequencies,

EQ2BW=0

Figure 53

EQ Band 2 – Peak Filter Gains for Lowest Cut-off

Frequency, EQ2BW=0

-2

-1

-15

-10

-5

Frequency (Hz)

Figure 54 EQ Band 2 – EQ2BW=0, EQ2BW=1

WM8976 Datasheet(PDF) 102 Page - Wolfson Microelectronics plc

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