Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2005-07-28
2010-10-19
Addy, Anthony S. (Department: 2617)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S127100, C455S127200, C455S127500, C455S574000
Reexamination Certificate
active
07818021
ABSTRACT:
In a PC card communication terminal that operates supplied with power from a host device, problems such as malfunctions due to a supply voltage drop at the time of high transmission output are prevented from occurring. A baseband processor (1106) selects a transmission-power upper-limit measurement mode when a PC card terminal (1103) is to be controlled for the first time. A supply voltage drop is measured by a voltage measurement circuit (1114) while a load value of a load circuit (1112) is being changed. The load value of the load circuit (1112) when the supply voltage decreases to a permissible lowest supply voltage is obtained. Using a conversion table stored in a memory (1107), the load value is converted into a transmission output and is set as a transmission-output upper limit. In a normal communication mode, a maximum transmission output is restricted based on this transmission-output upper limit.
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Kitaji Mitsuhiro
Matsumura Takashi
Addy Anthony S.
Hogan & Lovells US LLP
Kyocera Corporation
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