WM8980CGEFLSLASHV datasheet(116/123 Pages) WOLFSON

Numer części	WM8980CGEFL/V

Szczegółowy opis	Stereo CODEC with Speaker Driver and Video Buffer

PDF	123 Pages

Scroll/Zoom	100%

Producent	WOLFSON [Wolfson Microelectronics plc]

Strona internetowa	http://www.wolfsonmicro.com

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116 / 123 page

WM8980

Pre-Production

PP, Rev 3.8, May 2012

116

5-BAND EQUALISER

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.

-1

-15

-10

-5

Frequency (Hz)

-1

-15

-10

-5

Frequency (Hz)

Figure 65 EQ Band 1 Low Frequency Shelf Filter Cut-offs

Figure 66 EQ Band 1 Gains for Lowest Cut-off Frequency

-1

-15

-10

-5

Frequency (Hz)

-1

-15

-10

-5

Frequency (Hz)

Figure 67 EQ Band 2 – Peak Filter Centre Frequencies,

EQ2BW=0

Figure 68

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

Frequency, EQ2BW=0

-2

-1

-15

-10

-5

Frequency (Hz)

Figure 69 EQ Band 2 – EQ2BW=0, EQ2BW=1

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