| 摘要 |
PROBLEM TO BE SOLVED: To provide a synchronization circuit for simply and reliably switching from a closed loop mode to an open loop mode or vice versa. SOLUTION: A circuit has a programming resistor REG FT for programming a specific value of frequency for scanning the sample of a profile, a demultiplexer DEMU and a multiplexer MUX for inputting the output of the programming resistor to a first resistor REG A, and a circuit MSF FALSE for generating a compulsory synchronizing pulse for loading the data of the programming resistor to a first resistor during opened loop operation by a value, in which the counter value of a third counter CONTN is smaller than the number of samples by 1 and for generating a reset signal for resetting a first counter CONT UP, the multiplexer, and the demultiplexer. |
