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This is a project for 2 way audio door phone, the features might be as listed below.
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1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current.2 y" o' t0 K" i3 i l8 t
2. 2 way audio ability, it means echo cancellation ability is necessary. The IC selected would need a DSP inside or any software base library to address the echo and howling problem.) d/ `$ m# R7 Y2 E" ?' c
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
* X: _# `! @9 J3 U4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.% w. H! }% Q- s: A
5. For the audio output, the internal decode must be able to convert the signal into analog signal.
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Is there any recommendation for suitable IC for our applications?; D" S' d8 p1 u0 l7 ?% D
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regards! |
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