Title:
TRANSMISSION OUTPUT CIRCUIT AND MOBILE COMMUNICATION TERMINAL
Document Type and Number:
Japanese Patent JP3958066
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a transmission output circuit by which transmission power can always precisely be controlled and the fault of a component which causes the abnormality or erroneous transmission of transmission power which interferes with another user can be detected.
SOLUTION: The transmission output circuit is provided with: a transmission power control data generation means which generates a gain control signal for feedforward-controlling a gain control amplifying means so that the output signal level of a power amplifying means may become a target transmission power output level; a detection means for detecting the output signal of the power amplifying means for obtaining detection signal data; and a decision means for judging the presence/absence of the occurrence of a fault in a transmission output system by using the detection signal data from the detection means.
Inventors:
Takashi Nakayama
Application Number:
JP2002044463A
Publication Date:
August 15, 2007
Filing Date:
February 21, 2002
Export Citation:
Assignee:
Sony Ericsson Mobile Communications Inc.
International Classes:
H04B1/04; H03G3/00; H03G3/30; H04B7/005; H04B7/26; H04B17/00; H04B17/17; H04W52/04; H04W52/10; H04W52/52; (IPC1-7): H04B1/04; H03G3/30; H04B7/26; H04B17/00
Domestic Patent References:
| JP2001308724A | ||||
| JP11112366A | ||||
| JP2001196872A | ||||
| JP2000165261A | ||||
| JP918359A | ||||
| JP63121330A |
Attorney, Agent or Firm:
Masami Sato
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