(57) Abstract Objective The radio unit which is used by the cordless telephone and the likeTry to be able to adjust simply. Constitution Each part and the speech processing which form high frequency circuit 2It implements on the identical substrate with each part which forms circuit 4,It depends on the audio filter property and limiter property of radio unitWhen you adjust sensitivity and degree of modulation etc, on this identical substrateThe adjustment place which is provided beforehand is adjusted only, in this caseJoint of main circuit substrate 6 becomes unnecessary. Namely, radio uni-The result which can adjust tsuto independently, jointing main circuit substrate 6After doing, as comprehensive adjustment becomes unnecessary, when maintainingExchange of the unit which you can put to become easy, maintenance efficiencyImproves. In addition, high frequency circuit 2 and speech processing circuit 4With joint not to be connector joint, on the identical substrate patternBecause it is jointed, mixture of imported noise is obstructed.
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