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Cirrus Logic AN168 User Manual
Cirrus Logic Hardware
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Cirrus Logic AN168 User Manual | 36 pages
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Table of contents
Document Outline
Table of Contents
List of Figures
1. Design Process and Considerations
1.1 Design Flow
1.2 Mechanical Design
1.2.1 Selecting the Acoustic Components
1.2.2 Placing the Speaker and Microphone
1.3 Electrical Design
1.3.1 Selecting the Speaker Driver
1.3.2 Setting the Speaker Driver Gain
1.3.3 Volume Control
1.3.4 Acoustic Coupling
1.3.5 Setting the Mic Preamp Gain
1.3.6 Acoustic Sidetone
1.4 Echo Canceler Parameter Optimization
1.4.1 Starting Example
1.4.2 Tweaking the Parameters
1.4.3 Network Sidetone
1.4.4 Loop Gain
1.5 Tests
1.5.1 Acoustic Coupling
1.5.2 Acoustic Distortion
1.5.3 Acoustic ERLE
1.5.4 Call Testing and Coefficient Optimization
1.6 Layout Guidelines
1.6.1 CS6422-specific guidelines
1.6.2 Car-Kit guidelines
1.7 Quick list of important points:
1.7.1 Reset and configuration timing
1.7.2 Distortion
1.7.3 Speaker/mic placement
1.7.4 Acoustic coupling
1.7.5 Training sequence
2. Appendix - example speaker driver circuits
2.1 Example 1: TDA1519A -- 15 Watts into 4W
2.2 Example 2: TDA2003 -- 3Watts into 4W
2.3 Example 3: TDA1905 -- 2.5Watts into 4W
2.4 Example 4: LM1877-- 2Watts into 4W
2.5 Example 5: LM4861-- 1Watt into 4W
3. Revision History
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