PEB/F 4065

Overview

Semiconductor Group

5

1998-03-01

1.2

Functional Description

Figure 1

Block Diagram

The PEB 4065 supports AC and DC control loops based on feeding a voltage

V

line and sensing the transversal line current

I

It converts a unipolar input voltage

V

receiving gain of

This is accomplished by converting the input voltage to a current which is used to

transpose the low voltage signals of the interface to the high voltage line feeding section.

This current is reconverted to two voltages of opposite phase which are referenced to

the positive and negative supply voltage, respectively. Thus the differential DC

line-voltage in all normal polarity modes except ringing is related to the input voltage by

V

V

BAT

negative battery voltage

V

HINT

internal positive supply voltage

V

fix

internal voltage drop of supply filter (appr. 2 V).

Depending on the operation mode,

V

BGND (

V

ITB10371

Buffer

Buffer

Current sensor

Differential

Supply

Control

V/I Converter

Reference

Switch

I/V-Converter

Supply

C1

C2

V

PDN

2W

AGND

BAT

VV

BIM

SS

V

DD

V

RING

TIP

V

ab

BGND

HINT

V

a

Ι

Ι

b

V

BAT

V

H

Ι

TL

Ι