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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.: w+ b, D4 i3 w9 a6 e% c2 U& W, @
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.$ M1 s* T7 _4 |( j
3. RF media is 2.4GHz with frequency hopping, the IC selected should have the SPI interface to do the communication.
5 I' d# G) x+ a j+ s) T9 T4. The audio input will need an ADC to pick up the signal and with internal codec to compress the audio signal.
' s; k' y, F9 T. X( ~9 o& p' U5. For the audio output, the internal decode must be able to convert the signal into analog signal.( ~. \4 E" n& K' T) M6 Q
' V0 P8 h3 q% r0 GIs there any recommendation for suitable IC for our applications?
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( r3 ~+ W+ L0 ~3 Oregards! |
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