| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that PLL circuits start locking before transmitting a transmission frequency to be at a standby to thereby make the transmission frequency at a standby interfere with reception because radio equipment such as a TDMA that has to switch the transmission frequency at a high speed is provided with two PLL circuits as a transmission frequency oscillating part, in which the PLL circuits are locked by different frequencies and achieved by switching frequencies of the PLL circuits by a switch. <P>SOLUTION: The transmission frequency is created by synthesizing frequencies from a plurality of PLL circuits to thereby prevent reception from being interfered with even through the PLL circuits start locking to be at a standby. <P>COPYRIGHT: (C)2009,JPO&INPIT |
