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參數(shù)資料
| 型號(hào)： | PBL385711NS |
| 廠商： | ERICSSON |
| 英文描述： | High current Speech and Line interface Circuit |
| 中文描述： | 高電流語(yǔ)音和線路接口電路 |
| 文件頁(yè)數(shù)： | 1/14頁(yè) |
| 文件大?。?/td> | 261K |
| 代理商： | PBL385711NS |
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PBL 385 71
June 1999
PBL 385 71
High current Speech and
Line interface Circuit
1. Impedance to the line and radio interference suppression
2. Transmitter gain and frequency responce network
3. Receiver gain and frequency responce network
4. Sidetone balance network
Figure 1. Functional diagram.
16-pin plastic BW SO
16-pin plastic BW DIP
REC
7
9
14
6
3
2
16
15
1
8
AR
AT
PBL 385 71
+
11
10
AM
+
(aMute
1
3
2
4
Telephone
line
4,5,
12,13.
Description.
PBL 38571 is a monolithic integrated speech transmission circuit for use in
electronic telephones and as DECT line interface with balanced in - and output. It is
designed to accomodate either a low impedance dynamic microphone or an electret
microphone that can be supplied from the circuits own DC - supply. A signal summing
point at the transmitter input is available. An internally preset line length
compensation can be adjusted with external resistors to fit into different current feed
systems as for ex. 48 V, 2 x 200 ohms, 48 V, 2 x 400 ohms and 48 V, 2 x 800
ohms.The line regulation can be shut off in low mode. Application dependent para-
meters such as line balance, side tone level, transmitter and receiver gains and
frequency responces are set independently by external components which means an
easy adaption to various market needs. The setting of the parameters, if carried out in
certain order will counteract the interaction between the settings. It features high line
current capability on a small footprint. Function compatible with the PBL 3781 family
of speech circuits.
Key features.
Minimum number of external
components, 5 capacitors and 10
resistors.
Easy adaption to various market
needs.
Mute control input for operation with
DTMF - generator.
Transmitter and receiver gain
regulation for automatic loop loss
compensation. Disconnectable.
Extended current and voltage range
5 - 130 mA, down to 2 V.
Differential microphone input for
good balance to ground.
Balanced receiver output stage.
In 16 - pin DIP and SO BW batwing
packages.
Short start up time.
Excellent RFI performance.
PB 351
PBL38571
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PBL385731SOS | Speech Circuit for constant current feeding systems |
| PBL38573 | Speech Circuit for constant current feeding systems |
| PBL385731NS | Speech Circuit for constant current feeding systems |
| PBL385821SOS | Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated |
| PBL385821SOT | Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PBL385711SOS | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:High current Speech and Line interface Circuit |
| PBL38573 | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Speech Circuit for constant current feeding systems |
| PBL385731NS | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Speech Circuit for constant current feeding systems |
| PBL385731SOS | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Speech Circuit for constant current feeding systems |
| PBL38582 | 制造商:ERICSSON 制造商全稱:Ericsson 功能描述:Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated |
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