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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.
: |1 q9 F6 z* s# j" Z: w2. 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.
4 Q) a- t% q, J* X3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.! L* ~# A/ o, f7 y5 \9 ~$ B% ?3 e
4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.
3 f& i; P. O }! t; g5 T( d5. 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?
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6 }' s5 {0 _7 Q: Iregards! |
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