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This is a project for 2 way audio door phone, the features might be as listed below.% ]* G" ?$ z @
8 }' B; }. q, ]* X5 z$ P {7 J1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current.5 ?+ s: _; r( Y+ h7 |9 G* A- X
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.
$ l. x( P' w4 S% Z! U( P0 g3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
/ C' E" h& B* R" r4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal." F2 Z2 {. Q0 }) q/ K5 w
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?3 q& f8 U2 K4 d3 o4 ~& q
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regards! |
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