Title:
DETECTION CIRCUIT
Document Type and Number:
Japanese Patent JP3828879
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To easily widen a dynamic range as preventing deterioration of detection precision by variation of characteristics of equipment such as an amplifier and a wave detector and to sufficiently realize an AGC function even when this detection circuit is used for a transmitter and a receiver.
SOLUTION: A gain control part 150 adjusts gains of variable amplifiers 121, 131 by controlling the variable amplifiers 121, 131 as varying levels of signals to be outputted from an attenuator 101 to the variable amplifiers 121, 131 by controlling the attenuator 101. By this adjustment, the gain control part 150 determines the respective gains so that a lower limit value of a detection range of a wave detector 122 coincides with an upper limit value of detection range of a wave detector 132.
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Inventors:
Yoshihide Tateno
Hiroshi Kosaka
Ryo Sasaki
Hiroshi Kosaka
Ryo Sasaki
Application Number:
JP2003146222A
Publication Date:
October 04, 2006
Filing Date:
May 23, 2003
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H03G3/30; H03G3/20; H04B1/04; H04B1/16; (IPC1-7): H03G3/30; H03G3/20; H04B1/04; H04B1/16
Domestic Patent References:
| JP11174143A | ||||
| JP11177442A | ||||
| JP2000349657A | ||||
| JP200116116A |
Foreign References:
| WO2003009481A1 |
Attorney, Agent or Firm:
Koichi Washida