| 摘要 |
<p>Disclosed is a compound resonant circuit wherein a wide range of frequency variation can be set with a high degree of freedom, whilst maintaining a resonance sharpness (Q) value within a desired range, and whilst maintaining good linearity for the frequency at the lowest output of the frequency characteristic curves of the compound resonant circuit. The disclosed circuit comprises: a first current path which performs a first gain adjustment on an AC power signal being supplied; at least one second current path which performs a second gain adjustment, having a different adjustment amount to the first gain adjustment, on the AC power signal; at least two resonant circuits which are provided in the first and the second current paths respectively, have mutually different resonance points or antiresonance points to the respective AC signals passing through the first and second current paths, and integrate the respective AC power signals; at least one compensation current path which performs a compensation phase shift on the AC power signal; a compensation circuit which is provided in the compensation current path and which removes the unnecessary components from the resonant circuits; and an analogue calculation circuit which performs analogue addition or subtraction on the AC power signals which have gone through the first and the second current paths and the compensation current path.</p> |
