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Voice Over PLC with High-Performance Audio Codec

Overview

This power line communication (PLC) audio system enables audio communication through existing power lines, making it ideal for applications like water heaters, doorbells, and in-house announcements. By eliminating the need for dedicated communication cables, the system reduces costs, simplifies construction and maintenance, and minimizes wiring errors.

System Benefits:

  • Enables audio communication between floors via PLC.
  • Reduces costs by eliminating the need for additional wiring or physical deployment.
  • Offers superior reliability, long-distance communication over 1km, and high-speed data transfer up to 1Mbps.
  • Features a low BOM cost and supports a compact design.

Block Diagram

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4:3 ratioConnector Line.294Connector Line.292Connector Arrow.162Connector ArrowConnector Line.203Connector Line.205Connector Line.242Connector Line.251Sheet.1Sheet.2Sheet.3Sheet.4WS029WS029WS029DC/DCDC/DCDC/DCSerial FlashSerial FlashSerial FlashAudio CodecAudio CodecAudio CodecUSB AudioUSB AudioUSB AudioBi-directionalBi-directional.22Connected signals arrowBi-directional.24Bi-directional.25Bi-directional.26Bi-directional.27Bi-directional.28Connected signals arrow.29LaptopConnected signals arrow.31Board - OptionalOption 1Option 1OPTION 1Board - Optional.34Option 2Option 2OPTION 2MicrophoneSheet.37Sheet.38Speakerspeaker_8_Sheet.41Sheet.42Sheet.43Sheet.44Serial FlashSerial FlashSerial FlashAudio CodecAudio CodecAudio CodecUSB AudioUSB AudioUSB AudioBi-directional.161Bi-directional.163Connected signals arrow.164Bi-directional.165Bi-directional.166Bi-directional.167Bi-directional.168Bi-directional.169Connected signals arrow.170Connected signals arrow.171Board - Optional.172Option 1Option 1OPTION 1Board - Optional.174Option 2Option 2OPTION 2Microphone.176Sheet.177Sheet.178Speaker.179speaker_8_Sheet.181Sheet.182Sheet.183Sheet.184Laptop.185Connector LineConnector Line.187Connector Line.188Connector Line.189Connector dotted lineConnector dotted line.191Transformer Inductor Coreless (Air conductor)Sheet.193Sheet.194Sheet.195Sheet.196Sheet.197Sheet.198Sheet.199Sheet.200Sheet.201Connected signals lineConnected signals line.204Transformer Inductor Coreless (Air conductor).206Sheet.207Sheet.208Sheet.209Sheet.210Sheet.211Sheet.212Sheet.213Sheet.214Sheet.215Connected signals line.222Capacitor Non-polarizedSheet.236Sheet.237Sheet.238Sheet.239Connected signals line.241Capacitor Non-polarized .243Sheet.244Sheet.245Sheet.246Sheet.247Board.317Board.252Audio UnitAudio UnitAudio UnitPLC UnitPLC UnitPLC UnitUSBUSBUSB3.3V3.3V3.3VBoard.259One board for Primary/SecondaryOne board for Primary/SecondaryOne board for Primary/SecondaryTransformer Inductor Coreless (Air conductor).262Sheet.263Sheet.264Sheet.265Sheet.266Sheet.267Sheet.268Sheet.269Sheet.270Sheet.271Connected signals line.272Connector Line.273Connected signals line.274Connector Line.275Transformer Inductor Coreless (Air conductor).276Sheet.277Sheet.278Sheet.279Sheet.280Sheet.281Sheet.282Sheet.283Sheet.284Sheet.285Connected signals line.286Capacitor Non-polarized .287Sheet.288Sheet.289Sheet.290Sheet.291Connected signals line.293Capacitor Non-polarized .295Sheet.296Sheet.297Sheet.298Sheet.299 3.3V3.3V3.3VDC Line (12V～36V)DC Line (12V36V)DC Line (12V～36V)PLC UnitPLC UnitPLC UnitAudio UnitAudio UnitAudio UnitOne board for Primary/SecondaryOne board for Primary/SecondaryOne board for Primary/SecondaryUSBUSBUSBBoard.306Board.307Board.308DC/DCDC/DCDC/DCSheet.309NB-PLC ModemNB-PLC ModemNB-PLC ModemUARTUARTUARTSheet.310NB-PLC ModemNB-PLC ModemNB-PLC ModemUARTUARTUARTSheet.311MCUMCUMCU UARTUARTUARTI2CI2CI2CI2SI2SI2S UARTUARTUARTSheet.312 MCUMCUMCU UARTUARTUARTI2CI2CI2CI2SI2SI2S UARTUARTUART

DC/DC

Buck Regulators (Integrated FETs)

DC/DC

Buck Regulators (Integrated FETs)

Serial Flash

SPI NOR Flash

Serial Flash

SPI NOR Flash

NB-PLC Modem

PLC Modem ICs

NB-PLC Modem

PLC Modem ICs

Audio Codec

Audio Codecs

Audio Codec

Audio Codecs

USB Audio

USB Audio

USB Audio

USB Audio

MCU

RA Arm Cortex-M MCUs
RX 32-Bit Performance/Efficiency MCUs

MCU

RA Arm Cortex-M MCUs
RX 32-Bit Performance/Efficiency MCUs

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