COMMUNICATION EQUIPMENT

PROBLEM TO BE SOLVED: To realize a communication equipment including a mixer circuit that copes with diversified frequency plans without the use of a special component and a special changeover circuit. SOLUTION: In a communication equipment consisting of a transmission mixer circuit 1 and a reception mixer circuit 3, a signal from a 1st input means 5 is given to the transmission mixer circuit 1 via a transmission local buffer circuit 2 and a signal from a 2nd input means 6 is given to the reception mixer circuit 3 via a reception local buffer circuit 4 respectively and either the transmission local buffer circuit 2 or the reception local buffer circuit 4 is operated by a control circuit 7 and the other buffer circuit is stopped.