| 摘要 |
PURPOSE: To provide a control circuit which can eliminate the step-out in a receiving operation mode and can ensure a stable receiving operation of a digital cordless telephone set. CONSTITUTION: The signal received through an anterma 1 is converted into an intermediate frequency signal by an IF amplifier 3 and demodulated at a demodulation part 41, and the received data RD are given to an RF control part 5. A comparator 8 compares the RSSI signal showing the strength of the received signal that is outputted from the amplifier 3 with the reference voltage. When the level of the RSSI signal is higher than that of the reference voltage, an AND gate 9 is opened. If the data RD are effective, the part 5 supplies a control signal BTREN of a an H level to a DPLL 42 via the gate 9 to make the DPLL 42 perform a lead-in action. |
