摘要:
A MEMS tunable capacitor and method of fabricating the same, includes a plurality of fixed charge plates on a substrate, the plurality of fixed charge plates having a same height, being arranged in a shape of comb-teeth and being electrically connected to one another, a capacitor dielectric layer covering the plurality of fixed charge plates, a movable charge plate structure spaced apart from the capacitor dielectric layer, and arranged on the plurality of fixed charge plates, wherein the movable charge plate structure includes a plurality of movable charge plates arranged corresponding the plurality of fixed charge plates, and an actuator connected to the movable charge plate structure allowing the movable charge plate structure to move in a horizontal direction.
摘要:
A disc trimmer has two circular-like segmented condenser plates which can be rotated relative to each other. The disc trimmer has an optimally low initial capacitance, which is independent of the final capacitance, and this is achieved by forming a dielectric corresponding to the shape of at least one plate circular-like and connecting it to a plate in a way that they approximately cover each other.
摘要:
A tunable, extended range, multilayered ceramic chip capacitor for incorporation into a plurality of substrate designs of micro-miniature circuitry and hybrid integrated circuits, comprising a multilayered ceramic chip capacitor; said chip having an electrode pattern as both upper and lower electrode layers embedded within the dielectric, forming a homogeneous chip capacitor structure. The capacitance range of the said chip capacitor is extended by the addition of a rotor plate positioned over a portion of said electrode pattern by a rotor contact spring which also provides a rotor contact terminal, such that said rotor plate may be rotated over the stator portion of said electrode pattern to provide a precisely tunable extended range of capacitance, a stator terminal spring to provide means to grip said extended range chip capacitor and means for circuit connection.
摘要:
A variable capacitor for use in electrical and electronic equipment which includes a stator disposed on an insulating base, a stator terminal lead having an electrode portion fixed to the stator and a terminal end extending through the insulating base. The variable capacitor includes a metallic rotor rotatably disposed on the stator through a dielectric plate, a rotor terminal lead having a resilient spring portion disposed on the rotor and a terminal end extending through the base, and an insulating cap of hollow cylindrical shape fitted over the resilient spring portion of the rotor terminal lead. The insulating cap is rigidly connected to the base to form the variable capacitor of compact size with sufficiently large electrostatic capacity.
摘要:
A variable capacitor is provided wherein a reinforcing plate is utilized in the rotor assembly in order to increase the range of the capacitor. The capacitor includes the stator plate and first electrode, the stator plate supporting a lead pin and a rotor positioning member, the rotor positioning member being rotatably mounted thereon. The rotor positioning member rotatably supports a uniformly thick rotor assembly in rotatable friction contact with the stator plate and first electrode. The rotor assembly includes a dielectric, a second capacitor electrode and a reinforcing plate, the thickenss of the dielectric determining the minimum value of capacitance of the variable capacitor. The rotor assembly also includes a fixed spring secured to the positioning member, the lead pin and fixed spring being adapted to facilitate use of variable capacitor in small-size electronic instrumentation.
摘要:
A variable capacitor having a ceramic stator with a flat major surface for engaging a flat conductive rotor plate mounted on a shaft extending through the stator. The other major surface of the stator has a transverse slot having a capacitance forming electrode over the bottom portion that is substantially parallel to the flat major surface. A spring biased rotor terminal is affixed to the end of the shaft extending through the stator.
摘要:
A vertical adjustable capacitor assembly includes a tubular dielectric bodyn which are embedded two diametrically opposed cylindrically curved electrically conductive plates. One plate serves as a stator plate and extends through one end of the tubular body to contact a terminal element at the bottom thereof. The other plate extends through both ends of the tubular body with one end of the plate contacting another terminal element at the bottom of the tubular body and the upper end of this plate is in direct electric circuit with the head of an electrically conductive rotary rotor having a shaft rotatably fitted in the axial, cylindrical bore of the tubular body. An arcuate member mounted on top of the tubular body prevents the rotor from axial movement while permitting rotation of the rotor. Rotation of the rotor through 180.degree. in either direction from a center position of minimum capacitance, tunes the capacitor assembly through its entire range.
摘要:
An electronic watch or other timepiece has a clockwork driven by an electronic oscillator having a quartz crystal. A variable trimmer condenser is connected in parallel with this crystal for adjusting the operating frequency of the oscillator and hence the accuracy of the watch. A counter-electrode or armature closely spaced from a fixed plate of this trimmer condenser is carried on or forms part of a bimetallic strip which normally lies against an abutment in the condenser housing so that only when the ambient temperature passes a predetermined threshold does the strip pull away from the abutment and later the capacitance of the condenser, thereby changing the operating frequency of the oscillator in a manner calculated to compensate for the effects of temperature variations on the crystal and to maintain that frequency stable within narrow limits. The strip can be arranged to make such compensation above or below the threshold whose value can be adjusted with the aid of the coacting setscrew.