Extended Range Received Signal Strength Indicator Module
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United States of America Patent
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Issued Date -
Jun 14, 2007
app pub date -
Dec 13, 2005
filing date -
Dec 13, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An extended range received signal strength indicator module includes input lines connected to a variable gain amplifier, which passes the amplified RF signal to a polyphase, which in turn passes the filtered signal to a series of RSSI stages. Each RSSI stage includes a log amplifier and outputs an amplified current to a current summer as well as to the next RSSI stage in the series. The current summer outputs the sum of the received currents to RSSI_OUT. An additional frequency filter and RSSI stage with inputs connected to the input lines before the variable gain amplifier that outputs the modified current to the current summer is also included. A control circuit switches the additional RSSI stage on or off as determined by a detection circuit that monitors the value of RSSI_OUT.
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