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This is a project for 2 way audio door phone, the features might be as listed below.0 x. v7 ?$ X) V2 Z' K3 A# }1 a
$ X H* J; L* a1. Battery operation, hence low standby consumption is important. The RF sniffing structure must be well organized, short wake up time, low standby current.
6 {5 q, r5 f( g& s4 Z1 O2. 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.
9 p! w" v! A! Q5 P* ^' v- A3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
& L. S0 a3 ^& p2 F# {* f4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.9 [- t; M$ f. u" p7 s ]8 i" Q1 D
5. For the audio output, the internal decode must be able to convert the signal into analog signal.
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7 @ d2 R8 C/ t+ b1 q: |5 o$ FIs there any recommendation for suitable IC for our applications?+ d9 x, ~; i9 M+ o" z9 ^0 I3 Z' d
/ s4 j$ M9 g% r$ X/ C! @regards! |
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