| 摘要 |
PROBLEM TO BE SOLVED: To attain low power consumption during an automatic frequency control circuit operation. SOLUTION: This automatic frequency control circuit 1 includes a mixing unit 10 that generates a modulated signal from a reception signal according to a frequency of a local signal, a demodulation unit 20 that demodulates the modulated signal supplied by the mixing unit 10, an error evaluation unit 30 that generates a frequency error signal according to a duty of the demodulated signal supplied by the demodulation unit 20, a holding unit 40 that holds a frequency setting of the local signal and updates the frequency setting according to the frequency error signal supplied by the error evaluation unit 30, and an oscillation unit 50 that controls a frequency of the local signal according to the frequency setting supplied by the holding unit 40. COPYRIGHT: (C)2011,JPO&INPIT |
