Two Noise Cancelling ICs Released by Austriamicrosystems

Published:2011/11/6 21:58:00 Author:Li xiao na From:SeekIC

The Austriamicrosystems is a manufacture of multinational semiconductor. It headquartered in Styria, America. The development and production of high performance analog IC, such as standard analog products, is the main business of this company. Austriamicrosystems devotes itself in the power management sensor and sensor interface and hand held consumer electronics.

Two active noise cancelling ICs, which can be used to reduces the power consumption have been released by this firm. Performance improvement includes a 10 dB positive SNR. The driver ICs is 3.8 mA at 1.5 V and less than 1 µA quiescent current in mono mode. The AS3420 can be used for Bluetooth and other types of wireless headset, which is a fully differential ANC speaker driver IC. The Bluetooth speaker driver is available in both feed-forward and feedback configurations. With the integrated low noise amplifiers, the device make the development of simple low-order filters possible, as well as complex multiple-order filters.

The fully low-noise amplifier and the adjustable gain over 128 steps are the features of microphone. The AS3400 can be used to reduce ambient background noise in wired headsets and improve the quality of conversations or listening to music. It is also available for the feedback or feed-forward operation. AS3420 and AS3400 have 0.1% and 0.03% low THD respectively.

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