WM8985GEFLSLASHR datasheet(112/118 Pages) WOLFSON

112 / 118 page

WM8985

Pre-Production

PP, Rev 3.4, October 2006

112

5-BAND EQUALISER

The WM8985 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

WM8985GEFL/R Datasheet(PDF) 112 Page - Wolfson Microelectronics plc

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