Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Reexamination Certificate
2003-11-05
2008-08-19
Anderson, Matthew (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
C455S067140, C455S068000, C455S522000, C455S115200
Reexamination Certificate
active
07415246
ABSTRACT:
A method for determining attenuation of a transmit/receive switch for attenuating inbound RF signals begins by enabling the transmit/receive switch to provide a loop back configuration between a transmitter section and a receiver section of a radio frequency integrated circuit. When the transmit section provides a test RF signal to the receiver section the processing continues when the receiver section measures the signal strength of the test RF signal to produce a 1stsignal strength. The processing continues by enabling receive attenuation mode of the transmit/receive switch. The processing continues when the transmit section provides another test RF signal to the receiver section via the transmit/receive switch in the receive attenuation mode to produce an attenuated test RF signal. The processing continues when the receive section measures the signal strength of the attenuated test RF signal to produce a 2ndsignal strength. The processing continues when the 1stsignal strength is compared with the 2ndsignal strength to determine the attenuation of the transmit/receive switch.
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Ibrahim Brima B.
Kim Hea Joung
Anderson Matthew
Broadcom Corporation
Dao Minh
Garlick & Harrison & Markison
Markison Timothy W.
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