RADIO TERMINAL

摘要

In a cellular telephone provided with a receiving circuit of a direct conversion type, a passive low-pass filter (32) is arranged between a mixer (28) for an I-channel and a base band circuit (36) for removing interference waves of or above a channel next to a channel neighboring to the I-channel, and another passive low-pass filter (34) is arranged between a mixer (30) for a Q-channel and the base band circuit (36) for removing interference waves of or above a channel next to a channel neighboring to the Q-channel. Since the low-pass filters (32, 34) for removing the interference waves of or above the channel next to the neighboring channel are of a differential type, the circuit scale can be small, and the power consumption is small. Since the interference waves are removed by the passive low-pass filters (32 and 34) and the active low-pass filters (56, 58), only the desired channel can be reliably received. <IMAGE>