| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a frequency control device enabling to detect an accurate frequency error. <P>SOLUTION: The frequency control device includes a quadrature detection part 20 for converting frequency modulated carrier waves into complex signals consisting of in-phase components and quadrature components, a delay detection part 60 for multiplying a value shown by the complex signals supplied from the quadrature detection part 20 by a conjugate complex numeral of a value shown by signals delaying the complex signals to generate detection signals consisting of in-phase components and quadrature components, a frequency shift detection part 70 for multiplying a value shown by the detection signals supplied from the delay detection part 60 by a value shown by signals delaying the detection signals to generate frequency shift signals consisting of in-phase components and quadrature components, and a frequency shift integration part 80 for integrating a value shown by the frequency shift signals supplied from the frequency shift detection part 70 to generate frequency shift integration signals consisting of in-phase components and quadrature components. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
