- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383990 > TDA9855 (NXP SEMICONDUCTORS) I2C-bus controlled BTSC stereo/SAP decoder and audio processor PDF資料下載
參數(shù)資料
| 型號： | TDA9855 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | I2C-bus controlled BTSC stereo/SAP decoder and audio processor |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP52 |
| 封裝： | 0.600 INCH, PLASTIC, SOT-274-1, SDIP-52 |
| 文件頁數(shù)： | 38/52頁 |
| 文件大小： | 345K |
| 代理商： | TDA9855 |
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頁當(dāng)前第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁
1997 Nov 04
38
Philips Semiconductors
Product specification
I
2
C-bus controlled BTSC stereo/SAP
decoder and audio processor
TDA9855
Loudness filter calculation example
Figure 12 shows the basic loudness circuit with an
external low-pass filter application. R1 allows an
attenuation range of 21 dB while the boost is determined
by the gain stage V
1
. Both result in a loudness control
range of +16 to
12 dB.
Defining f
ref
as the frequency where the level does not
change while switching loudness on/off. The external
resistor R3 for f
ref
→ ∞
can be calculated as:
G
v
20
---10
=
. With G
v
=
21 dB and R1 = 33 k
,
R3 = 3.2 k
is generated.
For the low-pass filter characteristic the value of the
external capacitor C1 can be determined by setting a
specific boost for a defined frequency and referring the
gain to G
v
at f
ref
as indicated above.
For example: 3 dB boost at f = 1 kHz
G
v
= G
v(ref)
+ 3 dB =
18 dB; f = 1 kHz and C1 = 100 nF.
If a loudness characteristic with additional high frequency
boost is desired, an additional high-pass section has to be
included in the external filter circuit as indicated in the
block diagram. A filter configuration that provides
AC coupling avoids offset voltage problems.
Figure 13 shows an example of the loudness circuit with
bass and treble boost.
R3
R1
------
1
10
G
v
20
------
–
ω
C1
(
)
j
--R1
R3
+
)
10
G
v
20
G
v
20
------
R3
–
×
1
10
------
–
=
Fig.12 Basic loudness circuit.
handbook, halfpage
MHA838
V1
R2
R1
33 k
VIX
LOX
C1
R3
Fig.13 Loudness circuit with bass and treble boost.
handbook, halfpage
MHA839
V1
R2
R1
33 k
VIX
LOX
20 k
2.2 k
220 nF
8.2 nF
150
nF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA9855WP | I2C-bus controlled BTSC stereo/SAP decoder and audio processor |
| TDA9859 | Universal hi-fi audio processor for TV |
| TDA9860 | Universal HiFi audio processor for TV |
| TDA9861 | Universal HiFi audio processor for TV |
| TDA9873 | Multistandard dual carrier stereo sound decoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9855/V2,112 | 功能描述:音頻放大器 BTSC STEREO DECODER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA9855N | 功能描述:音頻放大器 BTSC STEREO DECODER DBXTV/AUD RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA9855WP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:I2C-bus controlled BTSC stereo/SAP decoder and audio processor |
| TDA9859 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal hi-fi audio processor for TV |
| TDA9859H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal hi-fi audio processor for TV |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。