VTech Telecommunications 80-4258-05 User Manual

TECH ENGINEERING CANADA LIMITED

V

TIT LE PDL MK3 with U2768 RF Theory O f Operat ion
MODEL Sony 970

PDL MK3 with U2768

RF Module

THEORY OF OPERATION

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Prepared By John Wang
Title RF Engineer
Checked By Sarkis Teghararian
Title RF Development Manager

Reference: Revision: 0 Page: 1 of 29

This document is proprietary to V
Specifications are preliminary and are subject to change without notice.

TECH ENGINEERING CANADA LTD

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TECH ENGINEERING CANADA LIMITED

V

TIT LE PDL MK3 with U2768 RF Theory O f Operat ion
MODEL Sony 970

Revision History

Revision No Description Page Effective Date

0 Initial Release All June 9, 2000

Reference: Revision: 0 Page: 2 of 29

This document is proprietary to V
Specifications are preliminary and are subject to change without notice.

TECH ENGINEERING CANADA LTD

. 107274

TECH ENGINEERING CANADA LIMITED

V

TIT LE PDL MK3 with U2768 RF Theory O f Operat ion
MODEL Sony 970

Table of Cont ents

1 RF SECTION OVERVIEW .....................................................................................4

1.1 Introduction

1.2 Overview of changes for U2768...................................................................................................................4

1.3 Frequency Tables

1.3.1 Handset Frequencies...............................................................................................................................5

1.3.2 Base Frequencies ....................................................................................................................................6

1.4 Block Diagram

.................................................................................................................................................4

......................................................................................................................................5

.............................................................................................................................................7

2 RF SECTION DETAILED OPERATION..................................................................8

2.1 Antenna Section

2.1.1 Antenna...................................................................................................................................................8

2.1.2 SAW Duplexer........................................................................................................................................8

2.2 Receive Section

2.2.1 LNA........................................................................................................................................................8

2.2.2 RX Mixer................................................................................................................................................8

2.2.3 RX VCO..................................................................................................................................................8

2.2.4 RX Synthesizer........................................................................................................................................8

2.2.5 IF Amplifier Stage...................................................................................................................................9

2.2.6 IF Filtering..............................................................................................................................................9

2.2.7 Demodulator............................................................................................................................................9

2.2.7.1 RSSI Comparator................................................................................................................................9

.........................................................................................................................................8

..........................................................................................................................................8

2.3 Transmit Section

2.3.1 TX Amp ..................................................................................................................................................9

2.3.2 TX VCO..................................................................................................................................................9

2.3.3 TX Synthesizer/PLL................................................................................................................................9

Reference: Revision: 0 Page: 3 of 29

This document is proprietary to V
Specifications are preliminary and are subject to change without notice.

........................................................................................................................................9

TECH ENGINEERING CANADA LTD

. 107274