| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the plural-synthesizer control system for personal handy phone system where number of control lines from a modulation-demodulation IC to two 1st local sections is reduced in a PHS terminal corresponding to 1-frame 2-slot transmission reception and to provide the method for controlling plural synthesizers. SOLUTION: A modulation-demodulation IC 105 controls latch enable terminals LE1, LE2 of PLL frequency synthesizer IC1, IC2 205, 206 used to control write of frequency setting data, the write of the frequency setting data to the two PLL frequency synthesizers is made through a same control line by using a different write timing between the two PLL frequency synthesizers and a control signal at a latch enable terminal LE2 used to control write of the frequency setting data to the one PLL frequency synthesizer IC2 206 is generated from the other control signal by using an inverter 207 and a NAND circuit 208.</p> |
