Integrated circuits and used and this high-frequency receiver, a portable device, and a transmitter for use in this using these, the method for producing a high-frequency receiver and the portable device

摘要

PROBLEM TO BE SOLVED: To solve the problem wherein response to fluctuation in a transmission signal inputted from a TV antenna is slow.;SOLUTION: The portable equipment is provided with a phase shifter 212 for changing the phase of a distribution transmission signal that becomes an interference, a detector 216 for detecting the level of a transmission signal included in a reception signal inputted via the antenna, and a level regulator 213 for changing the level of the distribution transmission signal according to the level. A signal supplied via the level regulator 213 and the phase shifter 212 is synthesized with a reception signal before being supplied to a mixer 206, so that the transmission signal can be canceled even if the transmission signal inputted from the antenna fluctuates, thus receiving signals stably even for fluctuation, or the like of the transmission signal.;COPYRIGHT: (C)2006,JPO&NCIPI