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Podzespoły  IM70A135, IM69D130 - nowe mikrofony MEMS 


Infineon Technologies wprowadza do oferty dwa modele niskoszumnych mikrofonów MEMS: IM70A135 z różnicowym wyjściem analogowym oraz IM69D130 z cyfrowym wyjściem PDM. Są one dostępne w obudowie SMD o wymiarach 4 mm×3 mm×1,2 mm. Od typowych mikrofonów MEMS, dostępnych w ofercie innych producentów, różnią się strukturą wewnętrzną.

W typowym mikrofonie jest statyczna płytka bazowa a ruchoma membrana wzbudzana falą akustyczną. W zastosowanej przez Infineon strukturze dual backplate są dwie płytki bazowe, pomiędzy którymi przemieszcza się membrana wytwarzając różnicowy sygnał wyjściowy.

Pozwoliło to na uzyskanie większego o 10 dB poziomu punktu 10-procentowej zawartości THD - wynosi on aż 135 dB (SPL). Współczynnik SNR, wynoszący 70 dB dla modelu analogowego, jest o 6 dB większy od konwencjonalnych mikrofonów MEMS, co oznacza możliwość podwojenia dystansu, z którego użytkownik może wydać polecenie głosowe "słyszalne" przez urządzenie.

Więcej na www.infineon.com

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