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參數(shù)資料
| 型號(hào)： | PEB2265 |
| 廠商： | SIEMENS AG |
| 元件分類： | Codec |
| 英文描述： | Two Channel Codec Filter with IOM㈢-2 Interface (IOM㈢-2 - SICOFI㈢-2) |
| 中文描述： | 雙信道編解碼器與國際移民組織㈢-2接口（移徙㈢-2 - SICOFI㈢-2） |
| 文件頁數(shù)： | 13/77頁 |
| 文件大?。?/td> | 851K |
| 代理商： | PEB2265 |
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PEB 2265
IOM
-2 – SICOFI
-2 Principles
Semiconductor Group
13
1997-07-01
2.1.1
The analog input signal has to be DC-free connected by an external capacitor because
there is an internal virtual reference ground potential. After passing a simple antialiasing
prefilter (PREFI) the voice signal is converted to a 1-bit digital data stream in the
Sigma-Delta-converter. The first downsampling steps are done in fast running digital
hardware filters. The following steps are implemented in the micro-code which has to be
executed by the central Digital Signal Processor. This DSP-machine is able to handle
the workload for all two channels. At the end the fully processed signal (flexibly
programmed in many parameters) is transferred to the IOM-2 interface in a
PCM-compressed signal representation.
Transmit Path
2.1.2
The digital input signal is received via the IOM-2 interface. Expansion,
PCM-law-pass-filtering, gain correction and frequency response correction are the next
steps which are done by the DSP-machine. The upsampling interpolation steps are
again processed by fast hardware structures to reduce the DSP-workload. The
upsampled 1-bit data stream is then converted to an analog equivalent which is
smoothed by a POST-Filter (POFI). As the signal VOUT is also referenced to an internal
virtual ground potential, an external capacitor is required for DC-decoupling.
Receive Path
2.1.3
There are two loops implemented. The first is to generate the AC-input impedance (IM)
and the second is to perform a proper hybrid balancing (TH). A simple extra path IM2
(from the transmit to the receive path) supports the impedance matching function.
Loops
2.1.4
There are four analog and five digital test loops implemented in the IOM-2 – SICOFI-2.
For special tests it is possible to “Cut Off” the receive and the transmit path at two
different points.
Test Features
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PEB2265HV1.1 | Two Channel Codec Filter with IOM㈢-2 Interface (IOM㈢-2 - SICOFI㈢-2) |
| PEB2445 | Multipoint Switching and Conferencing Unit - Attenuation MUSAC-A |
| PEB2445-N | Multipoint Switching and Conferencing Unit - Attenuation MUSAC-A |
| PEB2445N | LTM4600 Evaluation Kit |
| PEB2447 | Memory Time Switch Extended Large MTSXL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PEB2265HV1.1 | 制造商:LANTIQ 功能描述:SP000214859_ASIC EOL310705 |
| PEB2265-HV1.1 | 制造商:Infineon Technologies AG 功能描述:Part Number Only 制造商:Siemens 功能描述:Part Number Only |
| PEB2265HV1.1D | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| PEB2266-H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:A-Law/u-Law CODEC |
| PEB2266HV2.2 | 功能描述:接口—CODEC POTS RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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