Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 8179209 | Complex resonance circuit A serial resonance circuit is prepared. The serial resonance circuit is configured of a pair of resonance circuit is configured of a pair of resonance elements serially connected to each other at a midpoint therebetween and exhibiting resonance frequencies equal to ... | 05/15/2012 |
| 8076998 | Electromagnetic bandgap structure and printed circuit board An electromagnetic bandgap structure is disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure that blocks a noise of a certain frequency band can include 4 or more conductive plates, a first stitching via, which ... | 12/13/2011 |
| 7973619 | Electro-magnetic bandgap structure An electro-magnetic bandgap structure is disclosed. The electro-magnetic bandgap structure in accordance with an embodiment of the present invention includes a plurality of conductive plates bridge-connected with one another on a same plane, whereas the each of the ... | 07/05/2011 |
| 7446631 | Radio frequency inductive-capacitive filter circuit topology A filter circuit topology for filtering a radio frequency input signal includes one or more inductor devices, such as, for example, discrete chip or air coils. The inductor devices are center tapped into a capacitor coupled to the ground. The center-tapped inductor ... | 11/04/2008 |
| 7424276 | Transmitter and wireless communication apparatus using the transmitter In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with lag-lead characteristics (secondary or more filter including a capac... | 09/09/2008 |
| 7355319 | Boundary acoustic wave device A dielectric substance is laminated on one surface of a piezoelectric substance, and an IDT and reflectors are disposed as electrodes at a boundary between the piezoelectric substance and the dielectric substance, and the thickness of the electrodes is determined so... | 04/08/2008 |
| 7308241 | Receiver system A conventional receiver system has a filter circuit with unsatisfactory gain characteristics, and thus does not offer satisfactory reception performance. A receiver system of the invention has a filter circuit employing an equivalent inductor circuit including a cap... | 12/11/2007 |
| 7292449 | Virtual ground return for reduction of radiated emissions A digital apparatus having a cable comprising a plurality of high-speed and low-speed signal carrying conductors, the conductors carrying the low-speed signals are bypassed to a signal ground with selected values of capacitance so as to become virtual signal ground ... | 11/06/2007 |
| 7285945 | Fixed filter assembly for proof of performance testing on CATV systems A fixed filter assembly kit includes a plurality of filters with associated terminals inside a case. A booklet disclosing which filters are associated with which terminals as well as technical information about each filter is includes inside the lid. When the case l... | 10/23/2007 |
| 7282963 | Wide-band circuit coupled through a transmission line To provide a broadband circuit from which a desired circuit characteristic is stably obtained over a wide frequency band with a small number of circuit devices and which can be easily designed. In the case of the broadband circuit to which a circuit device is connec... | 10/16/2007 |
| 7259639 | Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof Inductor topologies for filters used in broadband applications are described. In one implementation, an apparatus, such as an interface module includes a printed circuit board and a filter. The filter includes a generally circular high Quality factor (Q) value spira... | 08/21/2007 |
| 7259643 | Tunable wideband bandpass filter, tunable multi-band bandpass filter using the same, and methods therefore A tunable wideband bandpass filter that can digitally vary the center frequency and bandwidth of a signal to be filtered, and includes a plurality of switched-capacitor banks for varying capacitance and converting the center frequency and bandwidth into a digital si... | 08/21/2007 |
| 7248035 | Automatic test equipment pin channel with T-coil compensation A passive matching network is connected to an input/output line for an automatic test equipment drive channel to compensate for capacitances associated with a receiver circuit connected to the line, and also an optional current-mode driver circuit. The matching circ... | 07/24/2007 |
| 7239524 | Resistive element apparatus and method A resistive element, a circuit board, and a circuit package, as well as a method of adding a resistive element to a circuit board are described. The resistive element includes a first contact point connected to a capacitor terminal, a second contact point connected ... | 07/03/2007 |
| 7233772 | Adaptive radio transceiver with filtering An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ... | 06/19/2007 |
| 7205863 | Temperature and frequency equalizer The present invention is an absorptive-type cable temperature and frequency equalizer that offsets changes in the gain of the other circuit components cables with increases in temperature and/or frequency. The equalizer comprises a temperature variable filter networ... | 04/17/2007 |
| 7203474 | Receiver system A conventional receiver system has a filter circuit with unsatisfactory gain characteristics, and thus does not offer satisfactory reception performance. A receiver system of the invention has a filter circuit employing an equivalent inductor circuit including a cap... | 04/10/2007 |
| 7197284 | Antenna switches including field effect transistors The present invention provides a transceiver circuit that includes a transmission amplifier coupled with an antenna input/output node. The transmission amplifier is configured to amplify communications to be transmitted from the transceiver circuit. The transceiver ... | 03/27/2007 |
| 7177612 | Frequency generator and communication system using the same A frequency generator which can perform stable frequency oscillation unaffected by temperature variation. A frequency generator having a differential amplifier (1) having an LC resonance circuit (10) as a load and buffer circuits (21, 22)... | 02/13/2007 |
| 7170354 | Oscillator circuit with laser-trimmable load impedance An oscillator circuit for generating signals with a predetermined oscillator frequency is provided. The oscillator circuit has at least one resonator and at least one load impedance connected to the resonator. The oscillator circuit may be fully automatically trimme... | 01/30/2007 |
| 7148857 | Antenna assembly An antenna assembly according to the present invention includes an antenna, a protecting device and cables. A radio frequency module is set before the antenna assembly and supplies signal power to the antenna through cables. The protecting device is located between ... | 12/12/2006 |
| 7126443 | Increasing performance of planar inductors used in broadband applications Increasing performance of planar inductors used in broadband applications is described. In one implementation, an apparatus includes a high Quality factor (Q) value spiral planar inductor etched directly into a printed circuit board. A ferrite structure is attached ... | 10/24/2006 |
| 7116963 | Simplified high frequency tuner and tuning method A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the chan... | 10/03/2006 |
| 7084720 | Printed bandpass filter for a double conversion tuner A printed bandpass filter is mounted on a precision substrate to eliminate the need for post-fabrication tuning. The filter input is capacitively coupled to a series of quarter wavelength resonators and the filter output. The quarter wavelength resonators are printe... | 08/01/2006 |
| 7081587 | Self-sealing EMC door for removable units requiring a continuous grounding barrier A self-sealing apparatus for containing electrical energy associated with electrical components. The apparatus includes one or more removable devices maintained by a housing. Each of the removable devices contains electrical components therein and is separated from ... | 07/25/2006 |
| 7081018 | Structure of connecting wire to element-containing unit An insulative internal resin cover is provided to partition an internal space of upper and lower insulative resin covers into a wire receiving space and an element receiving space. A wire-side terminal is provided at an intermediate portion of a wire, and is electri... | 07/25/2006 |
| 7079644 | Input-output balanced filter An input-output balanced filter has a greatly reduced size and excellent stable electric characteristics. The input-output balanced filter includes two LC bandpass filter circuit units. A first LC bandpass filter circuit unit has a circuit structure in which a first... | 07/18/2006 |
| 7075308 | Blocking impedance A power line distribution includes one or more impedance devices coupled to the neutral conductor of the power line distribution to segment the power line distribution for fault detection. ... | 07/11/2006 |
| 7075363 | Tuned continuous time delay FIR equalizer An analog finite impulse response (“FIR”) filter generates a continuous time output using a chain of tunable delay elements. The tunable delay elements generate a time delay in an input signal. A calibration circuit, consisting of a control loop, tunes the delay... | 07/11/2006 |
| 7071797 | Method and apparatus for minimizing intermodulation with an asymmetric resonator A method and apparatus to control intermodulation in a circuit for filtering over the air signals by creating an asymmetric resonator is disclosed. By creating the asymmetric resonator, the intermodulation from out of band signals is reduced while keeping the filter... | 07/04/2006 |
| 7057475 | Ferrite choke An apparatus to filter noise from being induced into a power line. In one a ferrite choke is disclosed that filters noise from being induced into a power line. The ferrite choke includes a tube of ferrite, a supply power line and a return power line. The tube of fer... | 06/06/2006 |
| 7015774 | Noise filter and electronic apparatus having the same A noise filter of the present invention includes an inductor and a resistor connected in parallel with each other. A power supply frequency current does not pass the resistor but passes through the inductor with no loss. On the other hand, a high frequency noise cur... | 03/21/2006 |
| 7002434 | Lumped-element transmission line in multi-layered substrate A lumped-element transmission line is formed in a multi-layered substrate. A mutual inductance between first and second inductors in a T-equivalent circuit model is enlarged to a designed positive value to widen the application frequency bandwidth of the transmissio... | 02/21/2006 |
| 6956515 | Digital to analog converter augmented with direct charge transfer techniques A digital to analog converter augmented with Direct Charge Transfer (DCT) techniques. A digital to analog converter augmented with DCT and CDS techniques. A digital to analog converter augmented with Postfilter Droop Compensation. ... | 10/18/2005 |
| 6954119 | Cascaded arrangement of lower order filters and method of designing the same A passive filter arrangement and a method of providing such a filter is described. The frequency response of the filter arrangement is substantially the same as the frequency response of a first filter of an order having a first value, the frequency response of the ... | 10/11/2005 |
| 6946720 | Bipolar transistor for an integrated circuit having variable value emitter ballast resistors An integrated circuit including a bipolar transistor with improved forward second breakdown is disclosed. In one embodiment, the bipolar transistor includes a base, a collector, a plurality of emitter sections coupled to a common emitter and a ballast emitter for ea... | 09/20/2005 |
| 6944435 | Unconditionally stable on-chip filter and applications thereof An unconditionally stable on-chip filter includes a filtering section and at least one negative resistance module. The filtering section is operably coupled to filter a signal and includes realizable integrated circuit passive components. The at least one negative r... | 09/13/2005 |
| 6937719 | Multiplexing and demultiplexing of narrowband and broadband services in a transmission connection The invention relates to the implementation of narrowband and broadband services in a telecommunications network. A splitter element is connected to a transmission link, the splitter element comprising a passive low-pass filter block connected between the transmissi... | 08/30/2005 |
| 6933805 | High density capacitor filter bank with embedded faraday cage A high density capacitor filter bank for use in connection with printed circuit boards is provided. Capacitive elements are disposed within a conductive shield such that the capacitive elements are substantially orthogonal to the plane of the printed circuit board, ... | 08/23/2005 |
| 6927180 | Reducing line to line capacitance using oriented dielectric films By exposing dielectrics to a strong electric field, anisotropic characteristics may be introduced into the dielectric. This may result in the dielectric having different dielectric constants in different directions. As integrated circuits scale, importance of line t... | 08/09/2005 |
