PROBLEM TO BE SOLVED: To provide a device capable of preventing mismatch of circuit characteristics between channels caused by a temperature fluctuation and a power voltage fluctuation due to heat generation resulting from a power consumption of a multichannel transmission/reception circuit in a system for transmitting/receiving multichannel signal such as a medical diagnostic apparatus.SOLUTION: Channels which have a short distance therebetween are grouped so as to be included in the same group. During a reception period, a common correction signal is supplied to master channels allocated to the respective groups, and received signals are supplied to slave channels other than the master channels. A correction coefficient which tracks a characteristic fluctuation of each group is continuously searched for through continuous comparison between outputs of the respective master channels, and an output of each slave channel is corrected by using the correction coefficient of a group including the slave channel.COPYRIGHT: (C)2015,JPO&INPIT【課題】医療診断装置など多チャネルの信号を送受信するシステムにおいて、多チャネル送受信回路の消費電力にともなう発熱で温度変動や電源電圧変動が生じ、これにより、チャネル間の回路特性にミスマッチが生じることによる画像の劣化を防止可能な装置を提供する。【解決手段】各チャネルを距離が近いもの同士が同一グループとなるようにグループ分けし、受信期間中、各グループ内に割り当てられたマスターチャネルには共通の補正用信号を投入し、それ以外の各スレーブチャネルには各受信信号を投入し、マスターチャネルの出力間を比較し続けることで、各グループの特性変動に追従した補正係数を探索し続け、各スレーブチャネルの出力を、その属するグループの上記補正係数で補正する。【選択図】図1
