Epson C I - 4 5 Manual do Utilizador descarregar pdf (Página 3)

1960 E. Grand Ave., 2

Floor,

El Segundo, California 90245

Phone: 310.955.5300

Fax: 310.955.5400

CONTENTS

1. Purpose and Scope 1

2. Methods for improving design 1

2.1. Confirmation of the oscillation circuit and construction of the IC 1

2.2. Determine the preliminary values 2

2.3. Useful board design for the evaluation 2

2.4. Characteristics of each parameter of the oscillation circuit 3

3. Circuit evaluation 3

3.1. Deciding the best parameters 3

3.2. Deciding the CL value 4

4. Measurement procedure 4

4.1. Measurement of the Drive Level 4

4.1.1. Measurement of the Drive Level for AT crystals 4

4.1.2. Measurement of the Drive Level for Tuning Fork crystals 5

4.1.3. How to use a current probe 5

4.2. Measurement of the Oscillation Allowance 6

4.3. Actual data sampling 6

5. Other circuits and frequencies 6

5.1. Series resonance circuit for C-MOS inverter 7

5.2. Overtone oscillation circuit for AT crystals 7

Appendix A. Oscillation Circuit Example 8

i. Through hole parts 8

ii. Surface mount parts 9

Appendix B. Example of the Drive Level, Oscillation Allowance Characteristics 10

Appendix C. Measurement of Negative Resistance using the S - Parameter 11

Appendix D. Example of the Evaluation Equipment 13

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Epson C I - 4 5 Manual do Utilizador Página 3