STA339BWS datasheet(69/79 Pages) STMICROELECTRONICS

tên linh kiện	STA339BWS

Giải thích chi tiết về linh kiện	FFX with 100-dB SNR and dynamic range

PDF	79 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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69 / 79 page

DocID015276 Rev 8

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STA339BWS

Figure 21. EQDRC scheme

Extended postscale range

Postscale is an attenuation by default. When PS48DB is set to 1, an offset of 48 dB is

applied to the configured word, so postscale can act as a gain too.

Extended attack rate

The attack rate shown in Table 66 can be extended to provide up to 8 dB/ms attack rate on

both limiters.

Extended biquad selector

De-emphasis filter as well as bass and treble controls can be configured as user defined

filters when equalization coefficients link is activated (BQL = 1) and the corresponding BQx

bit is set to 1.

Table 77. Bit PS48DB description

PS48DB

Mode

Postscale value is applied as defined in coefficient RAM

Postscale value is applied with offset of +48 dB with respect to the coefficient

RAM value

Table 78. Bit XAR1 description

XAR1

Mode

Limiter1 attack rate is configured using Table 66

Limiter1 attack rate is 8 dB/ms

Table 79. Bit XAR2 description

XAR2

Mode

Limiter2 attack rate is configured using Table 66

Limiter2 attack rate is 8 dB/ms

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