Application notes
| Number | Title | Description | Downloads |
|---|---|---|---|
| AN-01 | Transducer Signal Port Location Key |
Provides key to Knowles' port location and terminal location naming system for all microphones and receivers. Numerous examples of various port locations are provided. |
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| AN-03 | The measurement and suppression of RF interference from TDMA phones |
How can cellular phones or other RF signals interfere with microphone and hearing aid operation? Examines various telecommunications protocols (TDMA, CDMA, GSM, USDC, DECT) and various frequencies (900MHz, 1.8GHz, 2.4GHz) impact on microphone performance and discusses how EMI gets into the signal path. Presents solutions on reducing RFI and EMI by using Knowles "C" and "CX" microphone technology. |
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| AN-10 | Transducer warranty date code numbering system |
Knowles Electronics system nomenclature for laser-marking manufacturing date codes with week and year of manufacture and warranty period is detailed. Warranty extension markings are reviewed along with numerous examples of date code markings. |
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| AN-13 | Soldering to Knowles transducers |
Aids the user in assembling Knowles transducers into finished products with good soldering reliability while avoiding heat damage. |
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| AN-16 | A Passive Current Source for Two-Wire Microphones |
Though two-wire microphones are often powered with an active current source, in many applications a passive sourse as described can be used. |
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