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This is a project for 2 way audio door phone, the features might be as listed below.7 W2 E) O. P8 m; H0 Q; I# E1 H1 x
0 ]" J/ G& s. q2 x7 B3 M! t/ P1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current./ D" R" y/ C- \' Q n
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.& s" Y! t5 \3 W, s
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
, H1 C& s5 V5 \4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.; h/ b- k) T/ G+ z: Z; X) S
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?
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3 }& B: a2 @5 D; tregards! |
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