- 您現在的位置：買賣IC網 > PDF目錄382720 > UCB1100 (NXP Semiconductors N.V.) Advanced modem/audio analog front-end PDF資料下載
參數資料
| 型號： | UCB1100 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Advanced modem/audio analog front-end |
| 中文描述： | 先進的調制解調器/音頻模擬前端 |
| 文件頁數： | 12/36頁 |
| 文件大小： | 290K |
| 代理商： | UCB1100 |
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頁當前第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
Philips Semiconductors
Preliminary specification
UCB1100
Advanced modem/audio analog front-end
1998 May 08
12
6.2
The telecom codec contains an input channel, built up from a 64
times oversampling sigma delta analogue to digital converter (ADC)
with digital decimation filters, programmable attenuation and build in
sidetone suppression circuit. The output path consist of a digital up
sample filter, a 64 time oversampling 4 bit digital to analogue
converter (DAC) circuit followed by a differential output driver,
capable of directly driving a 600ohm isolation transformer. The
output path includes a mute function. The telecom codec also
incorporates a loopback mode, in which codec output path and the
input path are connected in series.
Telecom codec
The telecom sample rate is derived from the SIB interface clock pin
(sibclk) and is programmable through the SIB interface. The telecom
sample rate is given by the following formula:
Fst
(2 * Fsibclk)
(64 * telecom_divisor)
(5
telecom_divisor
128)
For example, a sibclk of 10 MHz, with a divisor of 40, results in a
telecom sample rate of 7.813kHz. Both the rising and the falling
edges of the sibclk are used in case an odd telecom_divisor is set.
In that case a 50% duty cycle of the sibclk signal is mandatory to
obtain time equidistant sampling.
The input path of the telecom codec has a programmable
attenuation. It also implements a voice band filter, which consists of
an digital low pass filter, which is a part of the decimation filter.
Therefore the pass band of the voice band filter is determined by the
selected telecom codec sample rate. This voice band filter is
activated by the high pass enablebit in the telecom control register
B. The resulting telecom input filter curves are given in Figures 11
and 12.
The output section of the telecom codec is designed to interface with
a 600 ohm line through an isolation transformer. The built in mute
function is activated by the mutebit in the telecom control register B.
The output driver remains active in the mute mode, however no
output signal is produced.
tinp
tinn
toutp
toutn
mute
echo on
loopback
mux
attenuation
1 bit ADC
effect
4 bit DAC
effect
4
64fs
telecom output enable
4
64fs
side tone suppression
telecom input enable
loop inputs
FIR
16
reDC
hWDF
2
hWDF
2
+3dB
higFIR
round
up
14
fs
loFIR
2
haFIR
2
rup
loop inputs
haFIR
2
+3dB
haFIR
2
reDC
14
fs
noise
shaper
interpolator
4
SN00134
Figure 9.
Detailed Block Diagram Telecom codec
相關PDF資料 |
PDF描述 |
|---|---|
| UCB1100LP | Advanced modem/audio analog front-end |
| UCB1200 | Advanced modem/audio analog front-end |
| UCB1200BE | Advanced modem/audio analog front-end |
| UCB1300 | Advanced modem/audio analog front-end |
| UCB1300BE | Advanced modem/audio analog front-end |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UCB1100LP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1100LP/X3 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB-12 | 功能描述:斷路器 CIRCUIT BREAKER RoHS:否 制造商:Phoenix Contact 產品:Device Circuit Breakers 產品類型:Thermomagnetic 電流額定值:2 A 電壓額定值 AC:240 V, 277 V 電壓額定值 DC:50 V 極數:1 Pole 執行器類型:Slide 電路功能:Trip Free 系列:CB TM1 工作溫度范圍:- 30 C to + 60 C 照明:No |
| UCB1200 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1200B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UCB1200B |
發布緊急采購，3分鐘左右您將得到回復。