Class 334/45 - With lumped capacitor in tuned circuit

Subclass of Class 334 - Tuners
Definition: Subject matter in which at least a portion of the capacitance
No. of patents: 22
Last issue date: 09/28/1999

Number	Title	Issue Date
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
5781088	Lumped-constant resonator structure and method for adjusting it The invention relates to a lumped-constant resonator construction, and a method for adjusting a lumped-constant resonator construction. The lumped-constant resonator construction comprises at least one, preferably ceramic substrate (4), at least one capac...	07/14/1998
5175521	Miniature dynamically tunable microwave and millimeter wave device A miniature, electrostatically actuated, variable impedance circuit element which is operably tunable in response to control signals. With integrated circuit, thin film processing a fixed circuit member is fabricated on a substrate and a movable circuit m...	12/29/1992
4921465	Varactor tuned UHF RF signal input circuit An RF signal input circuit for a UHF tuner of a television receiver comprises a series-tuned circuit including a varactor diode and an inductance element connected in series, in the order named, between signal ground and a gate electrode of a field-effect...	05/01/1990
4802238	Radio receiver In a radio receiver which can be switched between at least two waveranges, the coil winding (33) of the oscillator circuit (31) has a further coil winding (36) inductively coupled to it with which a capacitor (37) is arranged in parallel for limiting the ...	01/31/1989
4710973	Varactor diode tuner with band switched coils and lines A tuner in which a band switching signal corresponding to a channel selected from a plurality of UHF and VHF bands is generated to enable the formation of a suitable resonant circuit for receiving television signals of the selected channel. It includes a ...	12/01/1987
4682131	High-Q RF filter with printed circuit board mounting temperature compensated and impedance matched helical resonators A helical filter is disclosed which includes a ground plane having microstrip transmission line segments to which a respective helical resonator coil is connected at the high impedance end thereof. A discrete capacitor is connected in parallel with each t...	07/21/1987
4504788	Enclosed loop-gap resonator The ends of a loop-gap resonator are extended along a closed path to define an enclosed chamber with a gap extending along its length. A lumped circuit resonator is formed and the magnetic field is confined to the chamber. Openings may be formed in the ch...	03/12/1985
4468644	Tunable reject filter for radar warning receiver Spaced conductive strips are formed on a substrate. A first transmission line transformer is connected between the input and one end of the first strip. A second transmission line transformer is connected between the other end of the first strip and the o...	08/28/1984
4359701	Construction of tuning circuit in tuner A printed circuit board lamination consisting of upper and lower printed circuit boards is provided with an area consisting of the sole lower printed circuit board, and a varactor diode and a resonance rod portion parallel to the lamination are arranged i...	11/16/1982
4254390	Compact electronic tuning device A tuning device including a conductive housing in which are suspended a dielectric substrate. A pair of first and second resonant circuits is disposed on the substrate in parallel with each other. Each resonant circuit is formed by an elongated conductive...	03/03/1981
4214218	Impedance matched tuning device having image trapping circuit A tuning device including a conductive housing in which is suspended a dielectric substrate. A pair of first and second resonant circuits is disposed on the substrate in parallel with each other. Each resonant circuit is formed by an elongated conductive ...	07/22/1980
4214217	Electronic tuning circuit having image trapping element A tuning circuit comprises a pair of identical resonant circuits each including a transmission line and a capacitive element, a coupling circuit associated with each transmission line to inject microwave energy into the resonant circuits and extract the t...	07/22/1980
4145659	UHF electronic tuner A high input selectivity UHF varactor tuner for a television receiver in which unamplified radio frequency signals are inductively coupled to a double tuned half-wave preselector comprising two aperture coupled half-wave tuned lines in separate resonant c...	03/20/1979
4129842	U-shaped microstrip resonant circuit In one embodiment, a resonant circuit comprising a ground-contacting conductive member, a dielectric layer provided on the ground-contacting conductive layer, a ground-contacting member provided on the dielectric layer and electrically connected to the gr...	12/12/1978
4121182	Electrical tuning circuit A first and second strip are provided on a dielectric substrate such that one end of the first strip juxtaposes one end of the second strip and the other end of the first strip juxtaposes the other end of the second strip. A capacitor is provided between ...	10/17/1978
4075583	Low loss tuneable filter A low loss tuneable RF filter including a parallel plate variable capacitor nd a helical resonator within an extension of the resonator shield. The capacitor stator is supported on an insulator above one end of the helix while the rotor is mounted between ...	02/21/1978
4048597	Planar printed circuit board arrangement useful in the UHF portion of a television tuner A tuner for a television receiver comprises a circuit board formed by a slab of dielectric material having conductors located on one side and discrete components mounted on the other so that it may be readily assembled and soldered. Some of the conductors...	09/13/1977
4039982	Coaxial cavity radio frequency tuning circuit having a toroidal-shaped electrode to effect tuning A tuning circuit having a coaxial cavity with a movable toroidal section to effect inductive tuning. The outer conductor is tapered to effect capacitive tuning by movement of the toroidal section axially within the cavity due to varying of the width of th...	08/02/1977
4025882	UHF tuner having frequency setting fine toned by varying characteristic impedance of resonant line A radio frequency tuner for ultra-high frequency range provided with an improved fine tuning device in which a conductor plate member is movably disposed in the vicinity of a resonant line whose one end is connected to a variable capacity element for tuni...	05/24/1977
3996529	Varactor tuning apparatus for a strip transmission line device A varactor tuning apparatus for tuning a strip transmission line radio frequency device, wherein the device having predetermined operating characteristics includes an active element such as an avalanche diode and a resonant conductive strip section. The t...	12/07/1976
3970974	Trimmer for a tuned UHF line A UHF tuner employing resonant cavities with tuned lines has a discrete air trimmer capacitor which includes a fixed electrode connected to the tunable line with one or more insulated turns of silver wire and a movable electrode guided into the fixed elec...	07/20/1976

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Class 334/45 - With lumped capacitor in tuned circuit