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アクティブ・ノイズキャンセラ

amsのANCソリューションは、受信パスにアクティブノイズキャンセレーション（ANC）を搭載しているため、バックグラウンドの周囲ノイズの音量を低減させ、ポータブル機器の音質を向上させます。このポートフォリオは、シングルエンドステレオおよびBTL（mono-bridge-tied load）アプリケーションの両方で、フィードフォワード、フィードバックおよびハイブリッドトポロジーをサポートします。

注目製品

製品情報 データシート デモボード
AS3412

Analog ANC solution


Active Noise Cancellation technology maximizes the end-user experience in today's advanced world of mobile communications, enabling crystal clear sound during phone conversations or music listening regardless of the surrounding environment noise.


A highly integrated system in combination with lowest power consumption on the market plus a cost-effective price model makes the AS3412 ideally suited for smartphones or other mobile devices.


The AS3412 is targeting feed-forward topology and is able to effectively reduce ambient noise up to 3 kHz. Used in a true wireless ear piece AS3412 even enables state of the art hybrid noise cancellation.
AS3418

Analog ANC solution


The AS3418 is ideally suited to enable ANC for true wireless earbuds due to its smallest size, lowest power consumption and best-in-class ANC. It improves the quality of music listening or phone conversations by reducing background ambient noise (>30dB). Because of its small system footprint, manufacturers are empowered to build ANC in very small and aesthetic form factors.
AS3435

Analog ANC solution


Integrated active noise cancellation solution with integrated bypass function addressing feedback and hybrid architectures for stereo wired headsets, suitable for music, video or mobile use.
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電力＆通信インターフェース

amsは、電力と通信のインターフェースであるPOW：COMを使用しているので、スマートイヤホンの充電と通信を同時に行うことができます



注目製品

製品情報 データシート デモボード
AS3442

Bluetooth earphones are gaining popularity and mobile charging for these devices is mandatory. Both, earphones and charger cradle, are equipped with electronics and sensors, but the connection between the charging case and the earphones is typically limited to two wires – ground and power. Without enhancing the capabilities of the two wires only power transfer for charging the battery is possible.

The AS3442/47 allows to extend the functionality of the two wire connection to enable charging and simultaneous communication to the earpiece. The MCU inside the charger cradle can request data from the earphone while the charging process is on-going and vice versa. In order to operate the system two chips per side are necessary. The master device (AS3442), which is typically located in the charger cradle, and a client device (AS3447), which is located in the accessory. The master device features an I2C interface typically connected to a MCU inside the charger cradle to initiate the single wire connection to the client device. Furthermore it enables readout of AS3442 register and I2C sensors which are connected to the AS3442 I2C master interface. An interrupt signal line is available to detect status changes on GPIOs or if communication is interrupted. The client device features besides the I2C master interface up to 5 GPIOs which can be controlled via the host MCU. An interrupt input pin is available whose status signal is also transferred to host MCU accordingly.
AS3447

Bluetooth earphones are gaining popularity and mobile charging for these devices is mandatory. Both, earphones and charger cradle, are equipped with electronics and sensors, but the connection between the charging case and the earphones is typically limited to two wires – ground and power. Without enhancing the capabilities of the two wires only power transfer for charging the battery is possible.

The AS3442/47 allows to extend the functionality of the two wire connection to enable charging and simultaneous communication to the earpiece. The MCU inside the charger cradle can request data from the earphone while the charging process is on-going and vice versa. In order to operate the system two chips per side are necessary. The master device (AS3442), which is typically located in the charger cradle, and a client device (AS3447), which is located in the accessory. The master device features an I2C interface typically connected to a MCU inside the charger cradle to initiate the single wire connection to the client device. Furthermore it enables readout of AS3442 register and I2C sensors which are connected to the AS3442 I2C master interface. An interrupt signal line is available to detect status changes on GPIOs or if communication is interrupted. The client device features besides the I2C master interface up to 5 GPIOs which can be controlled via the host MCU. An interrupt input pin is available whose status signal is
also transferred to host MCU accordingly.
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