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M61510AFP датащи(PDF) 16 Page - Renesas Technology Corp

номер детали M61510AFP
подробное описание детали  Sound Controller for Quality/Sound Field Control, with Built-in Surround Sound
PDF  23 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M61510AFP датащи(HTML) 16 Page - Renesas Technology Corp

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M61510AFP
Rev.1.00, Aug.07.2003, page 16 of 22
(5) Loudness
This IC incorporates a center-tap loudness circuit.
VOL IN1,2
18,25 pin
VOL OUT1,2
19,24 pin
+
-
0dB to -16dB:
1dB steps
VSELB OUT1,2
17,26 pin
Volume input
selector A
+
-
Volume input selector B
Loudness
circuitry
Loudness
SW
LOUD1,2
11,32pin
Tone and
surround
block
0dB to -64dB:1dB steps
<Characteristic curves>
Frequency f (Hz)
-10dB
0dB
-20dB
-16dB
100
10k
1k
fo=32
The loudness circuitry fo is determined by the
50 k
Ω internal resistance and the external
capacitor C, represented by the following equation.
fo = 1/ (2
π × 50kΩ × C) Hz
When C = 0.1
µF,
fo = 1/(2
π × 50kΩ × 0.1µF) = 32 Hz
(6) Equivalent circuit with surround on
Ch2
Ch1
Out1
Out2
External
5k
5k
5k
1k
5k
10k
5k
5k
5k
1
µ
200k
200k



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