MIXER CIRCUIT, FREQUENCY CONVERSION METHOD AND MOBILE COMMUNICATION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To obtain a mixer circuit that is suitable for miniaturization and for a semiconductor integrated circuit. SOLUTION: In this mixer circuit 1, an input signal received from an input terminal 3 is given to a double balance mixer where the input signal is frequency-converted by a local signal received from a local input terminal 4, and the signal after the frequency conversion is outputted from an output terminal 5 of the mixer circuit. Series resonance by a series resonance circuit 101 suppresses an image frequency component generated through the frequency conversion.