Class 334/14 - Reactance tuning

Subclass of Class 334 - Tuners
Definition: Subject matter in which an active element is operated in
No. of patents: 29
Last issue date: 05/13/2008

Number	Title	Issue Date
7372190	Driving apparatus A driving apparatus comprises: an electro-mechanical conversion element; a driving shaft that reciprocates in response to an extension and contraction of the electro-mechanical conversion element; a driven member, frictionally engaged with the driving shaft, that mo...	05/13/2008
7352995	Direct digitally tunable microwave oscillators and filters A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal ...	04/01/2008
7346981	Method for fabricating microelectromechanical system (MEMS) devices A process for fabricating a MEMS device comprises the steps of depositing and patterning on one side of a wafer a layer of material having a preselected electrical resistivity; bonding a substrate to the one side of the wafer using an adhesive bonding agent, the sub...	03/25/2008
7310215	Direct digitally tunable microwave oscillators and filters A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal ...	12/18/2007
7259417	Direct digitally tunable microwave oscillators and filters A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal ...	08/21/2007
7211923	Rotational motion based, electrostatic power source and methods thereof A power system includes a member with two or more sections and at least one pair of electrodes. Each of the two or more sections has a stored static charge. Each of the pair of electrodes is spaced from and on substantially opposing sides of the member from the othe...	05/01/2007
7110738	Direct digitally tunable microwave oscillators and filters A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal ...	09/19/2006
7068220	Low loss RF phase shifter with flip-chip mounted MEMS interconnection A hybrid circuit phase shifter assembly of RF MEMS switch modules and passive phase delay shifter circuits uses a low loss, preferably flip-chip, interconnection technology. The hybrid circuit assembly approach separates the fabrication of the MEMS switch modules fr...	06/27/2006
7006342	Variable capacitor having a rigidity-increasing feature A variable capacitor. The variable capacitor has a movable capacitor electrode including a major surface and a fixed capacitor electrode including a major surface. The major surface of the fixed capacitor electrode is opposite the major surface of the movable capaci...	02/28/2006
6979872	Modules integrating MEMS devices with pre-processed electronic circuitry, and methods for fabricating such modules A MEMS module is provided comprising at least one MEMS device adhesively bonded to a substrate or wafer, such as a CMOS die, carrying pre-processed electronic circuitry. The at least one MEMS device, which may comprise a sensor or an actuator, may thus be integrated...	12/27/2005
6954348	Tunable MEMS capacitor Various embodiments of tunable capacitors are disclosed. One embodiment is in the form of a tunable capacitor (368) having a pair of stationary capacitor electrodes (392) that are fixed to and disposed the same distance above a substrate (388) i...	10/11/2005
6937456	Direct digitally tunable microwave oscillators and filters A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal ...	08/30/2005
6930487	Method for electronic damping of electrostatic positioners Electronic damping may be provided to an electrostatic positioner by developing a signal proportional to the velocity of the movable positioner plate and then changing the voltage applied to the positioner in proportion to this velocity signal to oppose the velocity...	08/16/2005
6914710	Multi-axis micro-electro-mechanical actuator A Micro-Electro-Mechanical Systems (MEMS) actuator employs electrostatic comb electrodes to position optical elements along multiple axes. In one embodiment, an actuator assembly includes an actuator support, typically a silicon wafer, supporting a fixed comb with a...	07/05/2005
6905614	Pattern-transfer process for forming micro-electro-mechanical structures Described is a photolithography “pattern transfer” process for forming Micro-Electro-Mechanical Systems (MEMS) structures. A first material layer is patterned so that raised portions of the layer define features of a MEMS structure to be formed. The resulting pa...	06/14/2005
6701779	Perpendicular torsion micro-electromechanical switch A semiconductor torsional micro-electromechanical (MEM) switch is described having a conductive movable control electrode; an insulated semiconductor torsion beam attached to the movable control electrode, the insulated torsion beam and the movable contro...	03/09/2004
6466114	Resonator with variable resonance frequency The invention relates to a resonator (200,300) with variable resonance frequency, intended for connection to an amplifier, thus forming an oscillator, said resonator comprising a resonator circuit (205,305) for deciding the resonance frequency of the reso...	10/15/2002
6418006	Wide tuning range variable MEMs capacitor A MEM capacitor having a capacitance plate nearer a movable plate than a separate bias plate. Voltage potential between the bias plate and movable plate determines the value of capacitance between the movable plate and the capacitance plate. In a preferre...	07/09/2002
6255913	Variable frequency oscillator circuit A variable frequency oscillator (VFO) circuit having an increased frequency tuning range to selectively obtain operating frequencies above and below a set frequency. The circuit includes a tank inductor connected in parallel with a tank capacitor for prim...	07/03/2001
6232847	Trimmable singleband and tunable multiband integrated oscillator using micro-electromechanical system (MEMS) technology A high-Q precision integrated reversibly trimmable singleband oscillator and tunable multiband oscillator are presented that overcome the problems laser trimming and solid state switches. This is accomplished using micro-electromechanical system (MEMS) te...	05/15/2001
5994985	Integrable high-Q tunable capacitor and method A high-performance integrable tunable inductor includes a "primary" coil and a "drive" coil placed in close proximity to each other and simultaneously driven with primary and drive currents, respectively. The drive current induces mutual components of ind...	11/30/1999
5959515	High Q integrated resonator structure A high Q integrated inductor-capacitor (L-C) resonator (200) includes a planar inductor (201) having a plurality of turns and a serially connected first and second capacitor (205, 207) that is connected in parallel with the planar inductor (201). The firs...	09/28/1999
5959516	Tunable-trimmable micro electro mechanical system (MEMS) capacitor A high Q MEMS capacitor that can be continuously tuned with a large tuning ratio or reversibly trimmed using an electrostatic force. The tunable capacitor has a master/slave structure in which a control voltage is applied to the master (control) capacitor...	09/28/1999
4760535	Control circuit for tuning a high-frequency input circuit A control circuit for tuning a high-frequency input circuit comprises, in addition to a first adjustable component 5 which is directly controlled by a control voltage, further adjustable components 6, 10 which are likewise under the influence of a control...	07/26/1988
4736457	Circuit arrangement for a tuner for changing over two frequency bands The invention relates to a circuit arrangement for a tuner, particularly a television tuner, for a change over switching between two frequency bands with the aid of a switching diode, said frequency bands, particularly the VHF band and the hyperband, bein...	04/05/1988
4179627	Electrical apparatus An electrical apparatus for use as a capacitor, solar cell, switching device, wave-shaper and the like. The apparatus comprises a first electrode, a first dielectric positioned proximate one side of the first electrode, a second electrode positioned proxi...	12/18/1979
4083012	Automatic function setting and indication arrangement for a communications receiver A compact and efficient design of a function switching and indication arrangement for a TV receiver or other communications apparatus is described. The functional setting, illustratively indicative of a selected one of a plurality of TV channels, is chose...	04/04/1978
4074216	Receiver tuning circuit A receiver tuning circuit in which without operation of extra switches a change-over can be made from tuning by means of a continuously varying tuning voltage to tuning by means of one of a number of adjusted tuning voltages by using a capacitor controlle...	02/14/1978
4039981	Variable impedance circuit A variable impedance circuit comprises an amplifier with a high input impedance and a high output impedance whose gain is variable in response to a control voltage, an emitter-follower transistor, and an impedance element adapted to feedback an output sig...	08/02/1977

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Class 334/14 - Reactance tuning