IEC 60122-2 : 2.0

QUARTZ CRYSTAL UNITS FOR FREQUENCY CONTROL AND SELECTION - GUIDE TO THE USE OF CRYSTAL UNITS FOR FREQUENCY CONTROL AND SELECTION

International Electrotechnical Committee

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FOREWORD PREFACE CHAPTER III: GUIDE TO THE USE OF QUARTZ CRYSTAL              UNITS FOR FREQUENCY CONTROL AND SELECTION Clause 1 Introduction 2 The quartz crystal unit as an electronic component   2.1 General   2.2 The equivalent electrical circuit of a quartz       crystal unit   2.3 Modes of vibration as a function of frequency   2.4 Frequency versus temperature characteristics   2.5 Crystal unit parameters   2.6 Crystal unit enclosures 3 The crystal unit as a circuit component   3.1 General   3.2 Oscillators, basic concept   3.3 Oscillators, practical considerations   3.4 Frequency stability   3.5 Use in filter applications 4 Factors affecting cost and availability of quartz   crystal units   4.1 Introduction   4.2 Crystal unit frequency   4.3 Crystal unit enclosures   4.4 Frequency tolerances   4.5 AT-cut. Temperature coefficient cost aspects   4.6 Ageing   4.7 Environmental   4.8 General testing considerations 5 Technical data to accompany order form   5.1 Check list of crystal unit parameters to be       specified in article sheet   5.2 Mandatory requirements   5.3 Optional requirements 6 Terms and definitions   6.1 General terms   6.2 Electrical properties   6.3 Operational properties 7 Bibliography

Abstract

Draws attention to some of the more fundamental questions which should be considered by the user before he places his order for a unit for a new application, and in so doing will, it is hoped, help ensure against unsatisfactory performance, unfavourable cost and non-availability.