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| Number | Title | Issue Date |
| 7999630 | Electronic circuit with an absorptive distributed limiting circuit An electronic circuit comprising a power limiter circuit. The power limiter circuit comprises a plurality of cascaded transmission line sections, each transmission line section comprising a series arrangement of at least one diode and a dissipative element for absor... | 08/16/2011 |
| 7944321 | Harmonic suppressing circuit There are included an LPF (3) and an HPF (4) that are connected in parallel to the output of a pre-emphasis circuit (2). There is also included a gain adjusting circuit (6) that performs a gain adjustment of low-pass filter with respect t... | 05/17/2011 |
| 7750753 | Photonic semiconductor electromagnetic limiter A system includes a source of electromagnetic energy or power and an amplitude-sensitive circuit. An amplitude-limiting transmission line couples the source to the circuit. The transmission line includes a semiconductor in the field of the transmission line and a li... | 07/06/2010 |
| 7557672 | Frequency selective limiting with resonators A frequency selective limiter includes a pair of back-to-back diodes, coupled to an input and an output of the frequency selective limiter, and a resonator. The resonator is coupled to the pair of back-to-back diodes. ... | 07/07/2009 |
| 7385456 | Power absorber system and method According to one embodiment of the invention, a power absorber for receiving a signal having a fundamental frequency includes an input node for receiving the signal and a first PIN diode circuit having a first end electrically connected at the input node and a secon... | 06/10/2008 |
| 7352259 | Broadband step attenuator with improved time domain performance An integrated step attenuator (“ISA”) monolithically integrated on a single chip for adjusting an input signal. The ISA may include a step attenuation network (“SAN”) that may include at least one switchable attenuation section, and at least one electronical... | 04/01/2008 |
| 7339208 | Semiconductor device having multiple lateral channels and method of forming the same A semiconductor device having multiple lateral channels with contacts on opposing surfaces thereof and a method of forming the same. In one embodiment, the semiconductor device includes a conductive substrate having a first contact covering a substantial portion of ... | 03/04/2008 |
| 7285807 | Semiconductor device having substrate-driven field-effect transistor and Schottky diode and method of forming the same A semiconductor device including a substrate driven field-effect transistor with a lateral channel and a parallel-coupled Schottky diode, and a method of forming the same. In one embodiment, the substrate driven field-effect transistor of the semiconductor device in... | 10/23/2007 |
| 7276989 | Attenuator circuit comprising a plurality of quarter wave transformers and lump element resistors A microwave attenuator circuit is disclosed, including a combination of a plurality of quarter wave transformers and a plurality of resistive elements. ... | 10/02/2007 |
| 7265674 | Thin flexible, RFID labels, and method and apparatus for use A radio frequency identification (REID) device may include a first, thin, flexible sheet, an antenna, and an integrated circuit. A surface portion of the first sheet may be affixed to a second, thin, flexible sheet to form a thin, flexible label. Such a label may be... | 09/04/2007 |
| 7171238 | Self-identifying antenna system An antenna system is disclosed, to be used with a radio component particularly a wireless access point or bridge. The present system includes an antenna element for transmitting and receiving signals at radio frequencies. An antenna connector is provided for establi... | 01/30/2007 |
| 7158031 | Thin, flexible, RFID label and system for use A radio frequency indentification (RFID) label includes an integrated circuit and an antenna. The label may also include two flexible films directly sealed to each other. The label may be affixed to an article and used in conjunction with an interrogation system to ... | 01/02/2007 |
| 7154954 | Communication system A communication system in which a reception signal can be accurately obtained from a signal transmitted over two-wire type transmission lines without any significant reduction in the communication speed. The communication system utilizing two-wire type transmission ... | 12/26/2006 |
| 7129805 | Method of increasing the operating frequency in a series-shunt configured PIN diode switch The vertical placement of the series and shunt PIN diodes of a microline series-shunt PIN diode switch results in an increased upper frequency limit of the switch. ... | 10/31/2006 |
| 7009462 | Limiter circuit A limiter circuit comprises a quarter-wave transmission line, a first limiter element, a first DC return element, a second limiter element and a second DC return element. The quarter-wave transmission line, which has a predetermined characteristic impedance, compris... | 03/07/2006 |
| 6998929 | Low threshold power frequency selective limiter for GPS A frequency selective limiter operative in a magnetostatic surface mode with a pair of parallel microstrip transducers formed on a substrate and having a length at least equal to the width of an overlaying YIG film ranging in thickness from about 0.1 μm and about 5... | 02/14/2006 |
| 6999294 | Waveguide A waveguide which is particularly suitable for transmitting electrical signals between or to and/or from electronic circuits, for example between integrated circuits disposed on a printed circuit board, has an over-voltage protection region. The over-voltage region ... | 02/14/2006 |
| 6967547 | RF switch including diodes with intrinsic regions An RF switch includes first and second diodes characterized by an intrinsic region. Pin diodes and nip diodes are examples of such diodes with intrinsic regions. The diodes are stacked with facing first connections. A bias conductor extends from the first connection... | 11/22/2005 |
| 6960725 | Electroluminescence (EL) tube and wire and manufacturing method An electroluminescent wire core having a flexible central electrode, a luminescent layer and a transparent, conductive layer. An outer surface of the central electrode is coated with the luminescent layer and the transparent, conductive layer respectively. In the tr... | 11/01/2005 |
| 6946717 | High voltage semiconductor device A compound semiconductor device is comprising a compound semiconductor substrate (219) having a ground plane (205); an active element (201) disposed on the substrate; a passive element (211) disposed on the substrate and electrically coup... | 09/20/2005 |
| 6937454 | Integrated device providing overcurrent and overvoltage protection and common-mode filtering to data bus interface An electrical component includes a mounting substrate, a common-mode rejection filter mounted to the substrate, and at least one circuit protection element mounted to or formed by the substrate. The circuit protection element may provide a PPTC resistor element for ... | 08/30/2005 |
| 6937112 | S/N enhancer A S/N enhancer using the magnetostatic wave signal. The S/N enhancer comprises a balun coupler for dividing an input signal into a first and second signals having the same power, the second signal having the phase difference of 180 degree with respect to the first s... | 08/30/2005 |
| 6914538 | High-power well logging method and apparatus A system and method for downhole power delivery. In one embodiment, the system delivers computer-regulated downhole power voltages, and may be configured to customize signal waveforms and power allocation on the various independent signal transmission modes to maxim... | 07/05/2005 |
| 6853264 | Input power limiter for a microwave receiver A power limiter for limiting power of high frequency signals at an input to a receiver comprises a plurality of transmission line sections connected in succession. Each section has a series inductance coupling an input to an output of the section, and a shunt capaci... | 02/08/2005 |
| 6781474 | Apparatus and method for tuning a filter An apparatus and method for tuning a filter (11) with oscillator alignment for applications where the filter tuning signal (19, 27) is generated independently of the local oscillator tuning signal and the tuning range is large, for example such as terr... | 08/24/2004 |
| 6621367 | Signal power dynamic range compressing circuit and power amplifier using the same In an input signal power dynamic range compressing circuit, an input signal is distributed by a directional coupler to a linear signal transfer path and a compressing signal generating path, and in the compressing signal generating path a compressing sign... | 09/16/2003 |
| 6518852 | Information signal compressor and expander An apparatus and method for compressing and expanding an information signal for use in noise reduction which includes an input terminal to receive the information signal, a first frequency crossover circuit coupled to the input terminal and configured to ... | 02/11/2003 |
| 6515539 | Microwave devices based on chemically induced dynamic electron spin polarization Optically pumped masers are described. The devices are useful for microwave amplification, microwave phase shifting and microwave limiting function. The devices are based on electron spin polarization of a stable free radical species induced by an intermo... | 02/04/2003 |
| 6504447 | Microelectromechanical RF and microwave frequency power limiter and electrostatic device protection The present invention provides a flexible mechanical bridge over a microstrip on a substrate, which utilizes an electromagnetic field increase, as generated by temporary power surge to shunt harmful power away from a MMIC system. The invention includes a ... | 01/07/2003 |
| 6496383 | Integrated circuit carrier arrangement for reducing non-uniformity in current flow through power pins In an integrated circuit carrier having a large number of power pins allocated to an internal power plane, the current flowing through the power pins may divide very unevenly, and result in current flow through some of the power pins which exceeds the max... | 12/17/2002 |
| 6469636 | High-power well logging method and apparatus A system and method is described for safely and economically providing up to 1800 watts to downhole equipment over existing logging cables. In one embodiment, the system includes a standard multiconductor logging cable which supports orthogonal signal tra... | 10/22/2002 |
| 6292054 | System and method for producing an amplified signal A signal amplification system involves decomposing a signal into two or more parts, amplifying the parts and then combining the amplified parts to produce the amplified signal. The decomposition can be done such that the resulting parts have characteristi... | 09/18/2001 |
| 6137375 | Loss control loop circuit for controlling the output voltage of a voltage-controlled oscillator A circuit for controlling the loss of a VCO in a master-slave tuning system includes an envelope detector, an amplitude regulator, a current-mode circuit, and a low-pass filter. The envelope detector receives the VCO output voltage and provides VCO output... | 10/24/2000 |
| 6087906 | Absorbent amplitude filter An absorbent amplitude filter for HF signals employs a reflective filter and an absorption circuit comprising a load resistor. The absorption circuit inventively comprises another λ/4 line upstream of the filter, which comprises, at the input side, a ser... | 07/11/2000 |
| 6057569 | Diode limiter device The present invention provides a diode limiter device in which a first penetration hole is formed on a wall surface of an H surface; the PIN diode is supported by the PIN diode mounting side of the post with the PIN diode being electrically connected to t... | 05/02/2000 |
| 5990757 | Gallium arsenide monolithic microwave integrated circuits employing thermally bumped devices Flip chip monolithic microwave integrated circuits (MMIC) devices formed on gallium arsenide substrates and use thermally bumped diodes and field effect transistor devices to achieve improved heat dissipation and power protection. Flip chip limiter MMIC d... | 11/23/1999 |
| 5608756 | Device for identifying traffic on a paired cable The invention relates to a device identifying traffic on a cable. The different types of traffic are characterized by different levels and frequency ranges. The device includes a limiter connected to the paired cable and delivering an output signal having... | 03/04/1997 |
| 5589440 | Ferroelectric RF limiter High Tc superconducting limiters are designed to operate at two or more levels of input signals. In one waveguide embodiment, multiple half wavelength branch waveguide lines are connected to a main waveguide line. The half wavelength lines are terminated ... | 12/31/1996 |
| 5585330 | Low-loss, wide bandwidth limiter A high-temperature superconductor (HTc S) in a microstrip configurat which is electrically related to a superconducting coupler and which is controlled by a heater disposed over the superconducting microstrip line. This limiter configuration i... | 12/17/1996 |
| 5523725 | Signal-to-noise enhancer A signal-to-noise enhancer 10 includes a first 90 degree hybrid set 20. A first output end of the first 90 degree hybrid set 20 is connected to an input end of a limiter used a magnetostatic wave element 62a utilized the magnetostatic surface wave mode. A... | 06/04/1996 |
