| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission circuit which detects and corrects a carrier leak precisely. SOLUTION: This transmission circuit has a first switch which selects either one of a first baseband signal and an oscillating signal, a second switch which selects either one of a second baseband signal and an oscillating signal, a first multiplier for multiplying the signal selected by the first switch by a first local frequency signal based on the oscillating signal, a second multiplier for multiplying the signal selected by the second switch by a second local frequency signal based on the oscillating signal, an adder for adding outputs of the first and second multiplier, and a correction section for correcting the first and second baseband signals in accordance with an output level of the adder respectively when the first and second switches select the oscillating signal. COPYRIGHT: (C)2011,JPO&INPIT |
