- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385814 > SAA7712 (NXP Semiconductors N.V.) Sound effects DSP PDF資料下載
參數(shù)資料
| 型號： | SAA7712 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Sound effects DSP |
| 中文描述： | DSP的音效 |
| 文件頁數(shù)： | 11/44頁 |
| 文件大?。?/td> | 178K |
| 代理商： | SAA7712 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁當前第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
1999 Aug 05
11
Philips Semiconductors
Preliminary specification
Sound effects DSP
SAA7712H
8
FUNCTIONAL DESCRIPTION
8.1
Analog outputs
8.1.1
A
NALOG OUTPUT CIRCUIT
Depending on the configuration of the equalizer sections,
the SAA7712H has 2 or 4 analog outputs which are
supplied by the same power supply. Each of these outputs
hasavoltageandacurrentpin(seeFig.3).Thesignalsare
available on 2 outputs (OUT0 and OUT1), or 4 outputs
(OUT0, OUT1, OUT2 and OUT3).
8.1.2
DAC
FREQUENCY
The sample rate (f
s
) of the selected source is the frame
rate of the DSP. The word clock for the upsample filter and
the clock for the DACs, at 4f
s
, are derived internally from
the word select of the selected audio source.
Fig.3 Analog output circuit.
handbook, halfpage
MGS208
BIT 0 to 13
MSB
Vref
DAC
OUT0_V
(OUT1_V)
OUT0_I
(OUT1_I)
8.1.3
DAC
S
Each of the four low noise high dynamic range DACs
consists of a signed-magnitude DAC with current output,
followed by a buffer operational amplifier.
8.1.4
U
PSAMPLE FILTER
To reduce spectral components above the audio band, a
fixed 4 times oversampling and interpolating digital filter is
used. The filters give an out-of-audio-band attenuation of
at least 29 dB. The filter is followed by a first-order noise
shaper to expand the dynamic range to more than 105 dB.
The band around multiples of the sample frequency of the
DAC (4f
s
) is not affected by the digital filter. A capacitor
must be added in parallel with the DAC output amplifier to
attenuate this out-of-band noise further to an acceptable
level.
In Fig.4 the overall frequency spectrum at the DAC audio
output without external capacitor or low-pass filter for the
audio sampling frequencies of 38 kHz is shown. In Fig.5
the detailed spectrum around f
s
is shown for an f
s
of
38, 44.1 and 48 kHz. The pass band bandwidth (
3 dB) is
1
2
f
s
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA8110G | Digital Signal Processor (DSP) for cameras(應用于照相中的數(shù)字信號處理器) |
| SAA8122A | Digital Still Camera Processor (ImagIC family)(數(shù)字靜態(tài)照相處理器) |
| SAA8122AEL | Digital Still Camera Processor ImagIC family |
| SAB-C504-2R24M | 8-Bit CMOS Microcontroller |
| SAB-C504-2R40M | 8-Bit CMOS Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7712H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Sound effects DSP |
| SAA7715 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital Signal Processor |
| SAA7715H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital Signal Processor |
| SAA7724H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Car radio digital signal processor |
| SAA7740 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital Audio Processing IC DAPIC |
發(fā)布緊急采購，3分鐘左右您將得到回復。