PBL3852

更新时间： 2024-11-07 22:44:35

品牌	Logo	应用领域
爱立信 - ERICSSON		/
页数	文件大小	规格书
24页	407K
描述
Universal Transmission Circuit

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中文翻译

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PBL3852 数据手册

PABpLril31895926

PBL 3852

Universal Transmission Circuit

Description

Key Features

The PBL 3852 is an universal transmission circuit in bipolar technology that performs

all the speech and line interface functions required to implement an electronic

telephone set suitable for the majority of existing telephone network requirements.

Easy adaptation of the DC-mask to different line feed systems. A summing point

for auxiliary signals to be transmitted like DTMF and hands-free audio signal. The

PBL 3852 has a low current consumption that enables the circuit to work with

reduced performance down to 2.1 volts (4.8 mA) across the circuit. The low current

consumption for a speech circuit is essential in telephone line powered handsfree

designs required to work at long line lengths. The PBL 3852 is especially suitable to

be used with Ericsson handsfree circuits like PBL 3786, PBL 3786/2, PBL 3881 and

PBL 3880 thanks to a specific interfacing arrangement.

The transmitting and receiving gains can be regulated in order to compensate for

the attenuation of the signals due to increasing attenuation with increasing line length.

It is also possible to limit high transmitting signal levels (soft clipping) thus preventing

excessive distortion caused by signal clipping. The gain regulation is set with discrete

external components.

•

Generates its own supply from the

telephone line

•

Adaptive to all types of telephone line

feeding systems (i.e. 48V 2x200Ω,

60V 2x 600Ω, 48V 2x800Ω)

Operates down to 2.1V (excl. polarity

bridge)

Adjustable DC-characteristic to the line

Few inexpensive external components

to function

Easy adaptation for various market

needs

Dialler interface with DC-supply, mute,

power -down and DTMF-input

Confidence tone in the receiver at

DTMF-dialling

”Soft clipping” that prevents distortion

at high transmit signal levels

Balanced microphone input for dyna-

mic, and electret microphones

Balanced receiver output for dynamic

and magnetic receiver elements

Transmitter and receiver gain regula-

tion for automatic loop loss compen-

sation (disabled in mute mode)

Four separate DC supplies for different

requirements

•

The circuit is easily adapted to different markets by setting the application depend-

ent parameters individually in certain order, this preventing the interaction between

the same. PBL 3852 has up to four different power supplies to feed microphones,

auxiliary circuits and functions.

All pin numbers in this paper refer to DIP package.

•

(+Line)

High gain of the receiver facilitates

volume control function

Microphone cut-off function possible

by a switch

All gain and frequency setting networks

in Rx, Tx and side tone are referred to

ground

Telephone

line

•

Excellent RFI performance

supply

Ref.

PBL 3852

4 +

Power

down

DC1 DC2

PBL3852

(-Line)

DTMF

PBL3852

A. Dynamic limiter

B. Sidetone network

C. Gain regulation with line length

18-pin plastic DIP 20-pin plastic SO

Figure 1. Functional diagram.

12 3 4 5 6 7...24

中文翻译

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与PBL3852相关器件

型号	品牌	获取价格	描述	数据表
PBL3852N	ERICSSON	获取价格	Telephone Speech Circuit, PDIP18, DIP-18
PBL3852SO	ETC	获取价格	Telecomm/Datacomm
PBL3853	ERICSSON	获取价格	Universal Speech Circuit
PBL3853N	ERICSSON	获取价格	Universal Speech Circuit
PBL3853SO	ERICSSON	获取价格	Universal Speech Circuit
PBL3853SO-T	ERICSSON	获取价格	Universal Speech Circuit
PBL38541	ERICSSON	获取价格	Universal Speech Circuit
PBL385411N	ERICSSON	获取价格	Universal Speech Circuit
PBL385411SO	ERICSSON	获取价格	Universal Speech Circuit
PBL385411SO-T	ERICSSON	获取价格	Universal Speech Circuit

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