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This is a project for 2 way audio door phone, the features might be as listed below.0 t: c; J& i5 Y* y0 o$ i
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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.
8 v7 b$ K' E h+ a! f& l& G7 N2. 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.) W9 O& K8 H. `
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.' n9 A. N3 k/ S1 _4 o) d
4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.) ?7 L. y2 p+ |2 U% k& D
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?* B4 J1 E( \& g4 e2 B! Y; i
; a& P' ?) a5 h2 eregards! |
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