| 摘要 |
In a high frequency oscillator circuit, or other high frequency circuit, utilizing a crystal, the physical capacitance Co, of the crystal may be neutralized and the impedance match of the crystal to the remaining circuit achieved over a range of variations in the crystal and varacter parameters by connecting two inductance coils as an auto transformer and disposing them in end to end relationship on a common form across the crystal with a movable metallic slug interiorly thereof for varying the reactance of one coil relative to the other to achieve the desired deviation to reactance response. The overall reactance of the auto transformer remains constant and thus the Co compensation is not altered.
|
