| 摘要 |
PURPOSE:To trim a frequency continuously while monitoring a resonance frequency with an oscillating circuit by trimming the frequency while measuring directly the resonance frequency in on-line. CONSTITUTION:If phase conditions which cause proper positive feedback oscillation are attained by a variable phase shifter 8, the frequency of the oscillating circuit is equal to a natural resonance frequency of a dielectric resonator 1. The oscillated frequency signal is led to a frequency counter 10, and the counted value is compared with a prescribed value which is stored preliminarily in a computer 11. If the oscillated frequency is lower as the result of this comparison, abrasive powder 13 is jetted to one plane of the dielectric resonator 1 from a nozzle 9 through a jet controller 12 on a basis of an indication of the computer 11. |
