Datasheet > PBL385701N

PBL385701N

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
12页	241K
描述
Universal Speech Circuit

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

PBL385701N 数据手册

September 1997

PBL 385 70

Universal Speech Circuit

Key features.

Description.

•

Minimum number of external

components, 7 capacitors and 11

resistors.

Easy adaption to various market

needs.

Mute control input for operation with

DTMF - generator.

A separate input for DTMF tones

controlled by mute.

PBL 38570 is a monolithic integrated speech transmission circuit for use in electronic

telephones. It is designed to accomodate either a low impedance dynamic or an electret

microphone. A separate input for DTMF dialling tones that is controlled by a mute signal,

and a signal summing point at the transmitter input, are 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 length compensation can be shut off in either high or

low gain mode. 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.

•

Transmitter and receiver gain

regulation for automatic loop loss

compensation.

•

Extended current and voltage range

5 - 130 mA, down to 2 V.

Differential microphone input for

good balance to ground.

Balanced receiver output stage.

Stabilized DC - supplies for low

current CMOS diallers and electret

microphones.

A number of different DC - supplies are provided to feed microphones and diallers.

•

18 - pin DIP and 20 - pin SO packa-

ges.

•

Short start up time.

Excellent RFI performance.

PBL 385 70

DTMF

input

Mic.

PBL 38570

Telephone

line

DC-supply

Sense input

Mute

(active low)

Gain

regulation

DC-output for

external devices

PBL 38570

1. Line impedance and radio interference suppression.

2. Transmit gain and frequency response network.

3. Receive gain and frequency response network.

4. Side tone balance network.

20-pin plastic SO

18-pin plastic DIP

5. DC-supply components.

Figure 1. Functional diagram. DIP package.

12 3 4 5 6 7...12

中文翻译

下载PDF

与PBL385701N相关器件

型号	品牌	获取价格	描述	数据表
PBL385701SO	ERICSSON	获取价格	Universal Speech Circuit
PBL385701SOT	ERICSSON	获取价格	Universal Speech Circuit
PBL38570SO	ERICSSON	获取价格	Telephone Speech Circuit, PDSO20, SO-20
PBL38571	ERICSSON	获取价格	High current Speech and Line interface Circuit
PBL38571/1NS	ETC	获取价格	Telecomm/Datacomm
PBL38571/1SOS	ETC	获取价格	Telecomm/Datacomm
PBL385711NS	ERICSSON	获取价格	High current Speech and Line interface Circuit
PBL385711SOS	ERICSSON	获取价格	High current Speech and Line interface Circuit
PBL38571N	ERICSSON	获取价格	Telephone Speech Circuit, PDIP16, BATWING, DIP-16
PBL38571SO	ERICSSON	获取价格	Telephone Speech Circuit, PDSO16, SO-16