Texas Instruments TLV320AIC3106 Evaluation Module (EVM) and USB motherboard TLV320AIC3106EVM-K TLV320AIC3106EVM-K 데이터 시트
제품 코드
TLV320AIC3106EVM-K
TLV320AIC3106EVM Software
www.ti.com
4.10.3
Digital Effects Filters
The digital effect filters (the biquad filters) of the TLV320AIC3106 are selected using the checkboxes
shown in
shown in
. The De-emphasis filters are described in the
data sheet, and their
coefficients may be changed (see
Figure 19. Enabling Filters
When designing filters for use with TLV320AIC3106, the software allows for several different filter types to
be used. These options are shown on a tab control in the lower left corner of the screen. When a filter
type is selected, and suitable input parameters defined, the response will be shown in the Effect Filter
Response graph. Regardless of the setting for enabling the Effect Filter, the filter coefficients are not
loaded into the TLV320AIC3106 until the Download Coefficients button is pressed. To avoid noise during
the update of coefficients, it is recommended that the user uncheck the Effect Filter enable checkboxes
before downloading coefficients. Once the desired coefficients are in the TLV320AIC3106, enable the
Effect Filters by checking the boxes again.
be used. These options are shown on a tab control in the lower left corner of the screen. When a filter
type is selected, and suitable input parameters defined, the response will be shown in the Effect Filter
Response graph. Regardless of the setting for enabling the Effect Filter, the filter coefficients are not
loaded into the TLV320AIC3106 until the Download Coefficients button is pressed. To avoid noise during
the update of coefficients, it is recommended that the user uncheck the Effect Filter enable checkboxes
before downloading coefficients. Once the desired coefficients are in the TLV320AIC3106, enable the
Effect Filters by checking the boxes again.
4.10.3.1
Shelf Filters
A shelf filter is a simple filter that applies a gain (positive or negative) to frequencies above or below a
certain corner frequency. As shown in
certain corner frequency. As shown in
, in Bass mode a shelf filter applies a gain to frequencies
below the corner frequency; in Treble mode the gain is applied to frequencies above the corner frequency.
Figure 20. Shelf Filters
To use these filters, enter the gain desired and the corner frequency. Choose the mode to use (Bass or
Treble); the response will be plotted on the Effect Filter Response graph.
Treble); the response will be plotted on the Effect Filter Response graph.
4.10.3.2
EQ Filters
EQ, or parametric, filters can be designed on this tab (see
). Enter a gain, bandwidth, and a
center frequency (Fc). Either bandpass (positive gain) or band-reject (negative gain) filters can be created
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TLV320AIC3106EVM and TLV320AIC3106EVM-PDK
SLAU209A – April 2007 – Revised June 2010
Copyright © 2007–2010, Texas Instruments Incorporated