US 6,023,406 A · LC composite component with variable capacitor and inductor

Abstract

An inductance/capacitance (LC) composite module with a built-in variable capacitor and coil is disclosed which includes a dielectric substrate having one principal surface on which a stator-side electrode is formed. Also formed thereon are a first terminal electrode connected to the stator-side electrode and a second terminal electrode independent of the first terminal electrode. The variable capacitor has a rotor of a chosen solid-state dielectric material in contact with the stator-side electrode. This rotor has thereon a rotor-side electrode which opposes the stator-side electrode with at least part of the rotor laid therebetween, thus forming an electrostatic capacitance. A rotatable support member is mounted so that it may rotate about the axis line at right angles to the substrate surface. The support member transmits its rotation to the rotor allowing the rotor to rotate with the support member. The support member has on its one end side an adjustment shape portion engageable with a hand tool for capacitance value adjustment. The coil is connected between the first and second terminal electrodes on the substrate. A shield cover is attached onto the substrate, which cover houses therein the rotor and support member as well as coil and has an opening for permitting access to the adjustment shape portion of the support member.

Claims20

Dependent claims

An LC composite component with a variable capacitor and an inductor, said component comprising:

an electrically insulating substrate having a principal surface on which a stator-side electrode is formed, and having formed thereon a first terminal electrode electrically connected to said stator-side electrode and a second terminal electrode independent of said first terminal electrode;
a rotor made of a solid-state dielectric material disposed in contact with said stator-side electrode;
a rotor-side electrode supported by said rotor which opposes said stator-side electrode with at least part of said rotor being laid between said stator-side and rotor-side electrodes, thereby forming an electrostatic capacitance;
a rotatable support member rotatably secured about an axis line crossing at approximately right angles with the principal surface of said substrate for transmitting its rotation to said rotor, thus making said rotor rotate together therewith, said support member having on its one end side a shape portion for adjustment which is engageable with an adjustment tool;
an inductor connected between said first and second terminal electrodes;
and
a shield cover having an opening for permitting exposure of the adjustment shape portion of said rotatable support member and being attached to said substrate, while housing therein said rotor and said rotatable support member as well as said inductor.

4 more elements

Dependencies are inferred from the claim text.

LC composite component with variable capacitor and inductor

Life of this patent

LC composite component with variable capacitor and inductor

Life of this patent

Abstract

Claims20