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This is a project for 2 way audio door phone, the features might be as listed below.+ O3 v2 X% @: ] k
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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.5 [+ H: \7 l& E% o
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.
! b+ K8 Y6 O& D* i5 ?8 m3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
) h3 w0 t; `% ]; H+ n G$ B; t% g/ {4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.
4 D: O8 H( g: k5. For the audio output, the internal decode must be able to convert the signal into analog signal.: I9 E4 i* _2 }$ i, i" u6 T" Q M
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Is there any recommendation for suitable IC for our applications?; _1 K6 D# k- R% g3 Q8 D
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regards! |
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