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BS EN IEC 60444-6:2021 – TC:2022 Edition

BS EN IEC 60444-6:2021 – TC:2022 Edition

$186.33

Tracked Changes. Measurement of quartz crystal unit parameters – Measurement of drive level dependence (DLD)

Published By Publication Date Number of Pages
BSI 2022 62
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PDF Catalog

PDF Pages PDF Title
1 30454869
37 A-30406253
38 undefined
41 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
43 English
CONTENTS
44 FOREWORD
46 INTRODUCTION
47 1 Scope
2 Normative references
3 Terms and definitions
4 DLD effects
4.1 Reversible changes in frequency and resistance
48 4.2 Irreversible changes in frequency and resistance
4.3 Causes of DLD effects
5 Drive levels for DLD measurement
49 6 Test methods
6.1 Method A (fast standard measurement method)
6.1.1 Testing at two drive levels
50 6.1.2 Testing according to specification
Figure 1 – Maximum tolerable resistance ratio for the drive level dependence as a function of the resistances or
51 6.2 Method B (Multi-level reference measurement method)
53 Annex A (normative) Relationship between electrical drive level and mechanical displacement of quartz crystal units
56 Annex B (normative) Method C: DLD measurement with oscillation circuit
Figure B.1 – Insertion of a quartz crystal unit in an oscillator
57 Figure B.2 – Crystal unit loss resistance as a function of dissipated power
58 Figure B.3 – Behaviour of the of a quartz crystal unit
Figure B.4 – Block diagram of circuit system
59 Figure B.5 – Installed in scanned drive level range
Figure B.6 – Drive level behaviour of a quartz crystal unit if −Rosc = 70 Ω is used as test limit in the Annex B test
60 Figure B.7 – Principal schematic diagram of the go/no-go test circuit
61 Bibliography

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BS EN IEC 60444-6:2021 - TC
$186.33