| 摘要 |
This invention finds application in wireless communication devices which have multiple communication protocols. For example, the device could provide WPAN communication through a protocol such as Bluetooth (RTM) and also WLAN communication using an IEEE 802.11 protocol. Each protocol has its own respective transceiver integrated circuit (IC) 702, 703. Only the main protocolâ s IC 702 is directly connected to an antenna 704, but the secondary protocolâ s IC 703 has access to the antenna by means of a digital RF loop-through connection 708 with the main protocolâ s IC. This application concerns the main protocolâ s IC 702, which has digital loop-through circuitry for interfacing with the digital loop-through connection. The main protocolâ s IC also has a digital interface for connection with a host controller 710. The main protocolâ s IC demodulates RF signals received through the antenna, demodulates the data and outputs this using the digital loop-through circuitry.
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