PBL38573

更新时间： 2024-09-19 22:44:35

品牌	Logo	应用领域
爱立信 - ERICSSON		/
页数	文件大小	规格书
15页	326K
描述
Speech Circuit for constant current feeding systems

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PBL38573 数据手册

PBL 385 73

June 1999

PBL 385 73

Speech Circuit for constant current

feeding systems

Description.

Key features.

PBL 38573 is a monolithic integrated speech transmission circuit for use in

•

Minimum number of external

componentsforfunction,withonefilte-

red DC-supply. 6 capacitors and 10

resistors.

Easy adaption to various market

needs.

electronic telephones. It is intended specially for telephone lines with constant current

feed. Maximum line current less than 130 mA in DIL package (100 mA in SO package).

Itisdesignedtoaccomodateeithera lowimpedancedynamicor anelectretmicrophone.

A signal summing point at the transmitter input is available for DTMF dialler- and

possible monitor or handsfree signals. An available internally preset line length

compensation can be adjusted or shut off in low gain mode with external resistors.

Application dependent parameters 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. A DC-

supply is provided to feed microphones and diallers.

•

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 - 130mA (DIP), down to 2 V.

Differentialmicrophoneinput forgood

balance to ground.

•

Balanced receiver output stage.

Stabilized DC - supply for low current

CMOS diallers and electret

microphones.

•

Short start up time.

Excellent RFI performance.

In 14- pin DIP and SO packages.

PBL 385 73

MIC.

REC

DC-supply

Telephone

line

Mute

(active low)

DTMF - input

PBL 385 73

DC supply for

external devices

14-pin plastic SO

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

PBL 385 73

5. DC supply components

14-pin plastic DIP

Figure 1. Functional diagram.

12 3 4 5 6 7...15

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与PBL38573相关器件

型号	品牌	获取价格	描述	数据表
PBL385731NS	ERICSSON	获取价格	Speech Circuit for constant current feeding systems
PBL385731SOS	ERICSSON	获取价格	Speech Circuit for constant current feeding systems
PBL38573N	ERICSSON	获取价格	暂无描述
PBL38580SO	ERICSSON	获取价格	SLIC, PDSO20, SO-20
PBL38581SO	ERICSSON	获取价格	SLIC, PDSO20, SO-20
PBL38582	ERICSSON	获取价格	Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated
PBL38582/1NS	ERICSSON	获取价格	Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated
PBL38582/1SOS	ERICSSON	获取价格	Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated
PBL38582/1SOT	ERICSSON	获取价格	Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated
PBL38582/2SOS	ERICSSON	获取价格	Telephone Line interface circuit for DECT, DAM, CT Unisolated or Isolated

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