| 摘要 |
PURPOSE:To make it possible to regulate quickly, coarse and fine an oscillating frequency, by constituting a frequency regulating pattern with strip conductors having a plural of alternate routes and by cutting them at given positions of the frequency regulating pattern. CONSTITUTION:A frequency regulating pattern which consists of a coarse regulating pattern 2 and a fine regulating pattern 4 is constituted with strip conductors. The coarse trimming is done by cutting in zigzag (x1, x2...), causing the pattern to make long and fine. The fine trimming is done so as to cause the pattern to make fine (y1, y2...). The frequency regulating pattern has a different trimming value of inductance according to the difference of the cutting position. Therefore, by changing the size of the space areas 3, 5 or the width of the pattern, trimming of about 10MHz per one cutting can be attained with the coarse regulation and trimming of 2MHz with the fine regulation, and required regulation and fine regulation are attained easily. |
