Communications transceiver utilizing a single filter
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United States of America Patent
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Oct 15, 2002
Grant Date -
N/A
app pub date -
Apr 26, 1999
filing date -
Apr 26, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A communications transceiver constructed to minimize the additional external components required for interfacing to the communications medium. The invention includes a communications transceiver with a reduced number of filters comprising a host interface, a control module, a transmit portion and a receive portion. The host interface is coupled to a host computer and functions to exchange transmit, receive and control related data to and from the transceiver. A novel aspect of the invention includes using the same filter for both receiving and transmitting. The single filter plays a dual role, providing filtering function during both receive operation and transmit operation, thus serving to minimize the external components required, the cost of the device and its complexity. A switching device, such as an analog switch, connects the filter either to the output of the transmitter during transmit operation or to the output of the communications medium interface during receive operation.
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