Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7983649 | Low noise figure radiofrequency device A RF device such as a tower mounted amplifier (TMA), mast-head amplifier (MHA), or Tower Mounted Boosters (TMB) includes a housing having a plurality of cavities and an input and an output, the input being coupled to the antenna and the output being coupled to a bas... | 07/19/2011 |
| 7937063 | Method and system for configuring a tower top low noise amplifier A method and system for protecting a LNA by acquiring a radio frequency control channel signal at a tower top low noise amplifier (TTLNA) system. In response to acquiring the radio frequency control channel signal, LNA mode information is determined from the acquire... | 05/03/2011 |
| 7937064 | Wireless transceiver and method of operating the same A transceiver 400 is provided in an ultrawide bandwidth device, which includes an antenna 110, a transmitter circuit 145, and a receiver circuit 165. A transmitter amplifier 440 is provided between the antenna 110 and the tr... | 05/03/2011 |
| 7877077 | Multi-band low noise amplifier and multi-band radio frequency receiver including the same A multi-band low noise amplifier (LNA) includes multiple low noise amplifying circuits configured to selectively operate in corresponding frequency bands. The low noise amplifying circuits include corresponding amplifying units and degenerating units. The degenerati... | 01/25/2011 |
| 7853235 | Field effect transistor amplifier with linearization An amplifier comprises a source degeneration inductance and at least two field effect transistors coupled in parallel and having mutually different gate biasing. Source connections of the field effect transistors are coupled along different positions of the source d... | 12/14/2010 |
| 7738853 | Low noise figure radiofrequency device A RF device such as a tower mounted amplifier (TMA), mast-head amplifier (MHA), or Tower Mounted Boosters (TMB) includes a housing having a plurality of cavities and an input and an output, the input being coupled to the antenna and the output being coupled to a bas... | 06/15/2010 |
| 7729683 | Method and system for power amplifier (PA) with on-package matching transformer Aspects of a system for a power amplifier with an on-package matching transformer may include a DC/DC converter that enables generation of a bias voltage level within an IC die based on an amplitude of an input signal to a PA circuit within the IC die. The bias volt... | 06/01/2010 |
| 7650133 | Semiconductor integrated circuit device and high frequency power amplifier module Switching characteristics in an SPDT switch are improved to reduce the rise delay in a low power slot following after a high power slot. Control terminals of an SPDT switch are respectively provided with backflow prevention circuits. The backflow prevention circuit ... | 01/19/2010 |
| 7650134 | Semiconductor integrated circuit device and high frequency power amplifier module In a SPDT switch, a resistor for leak path is connected between a terminal for antenna and a reference potential. The resistor for leak path allows charge capacitances accumulated in electrostatic capacitor elements provided as DC cut capacitors connected to transmi... | 01/19/2010 |
| 7616941 | Method and system for improving efficiency over power control for linear and class AB power amplifiers Aspects of a system for improving efficiency over power control for linear and class AB power amplifiers may include a current source circuit that enables determination of a bias current level for a PA circuit within an IC die based on an amplitude of an input modul... | 11/10/2009 |
| 7616940 | Stand-alone low noise amplifier A time division duplex (TDD) wireless apparatus includes a low noise amplifier (LNA) system, at least one antenna and a transceiver system. The apparatus supports N time division duplexed channels which each have a transmit direction of transmission flow and a recei... | 11/10/2009 |
| 7596364 | Merged low-noise amplifier and balun An RF amplifier can include a differential inductor for single-ended-to-differential signal conversion. With a center tap of the differential inductor coupled to signal ground and the RF input signal coupled to one of the end taps of the inductor, the negative of th... | 09/29/2009 |
| 7454190 | Receiver circuit for a receiving element A receiver circuit is disclosed which enables a reception signal fed into the receiver circuit by a reception element to be processed—e.g. amplified—with little to no errors. The receiver circuit has a cascode circuit on an input side, which cascode circuit gene... | 11/18/2008 |
| 7415252 | Arrangement and method for digital predistortion of a complex baseband input signal A system and a method create a pre-distorted signal y(k) from an interpolated broadband baseband signal x(k) for a transmitter power amplifier having at least three branches to which the signal x(k) is respectively connected on the input side. A first branch contain... | 08/19/2008 |
| 7409200 | Module integration integrated circuits A first signal conditioning circuit is formed from a first portion, a second portion and a third portion. Signal conditioning functions of each of these portions are facilitated by a predetermined type of integrated semiconductor die within which they are formed. Tw... | 08/05/2008 |
| 7395038 | High-efficiency modulating RF amplifier The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., hard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired modulation. In one embodiment, the spread between a maximum frequ... | 07/01/2008 |
| 7369096 | Impedance matched passive radio frequency transmit/receive switch A Radio Frequency (RF) structure services an antenna having a characteristic impedance and includes a differential Power Amplifier (PA), a differential Low Noise Amplifier (LNA), and a balun transformer. The differential PA has a differential PA output with a PA dif... | 05/06/2008 |
| 7369812 | Method and circuit arrangement for determining the signal strength in receivers with complex signal processing In order to provide a method of determining the signal strength in a receiver or transmitter with complex signal processing using the in-phase channel (I channel) and the quadrature channel (Q channel), by means of which it is also possible to reliably determine the... | 05/06/2008 |
| 7363017 | High frequency module and manufacturing method thereof A high frequency module used as a unit circuit making up a phased array antenna, in which the module may be reduced in size with reduction in cost. A high frequency module 10 includes a dielectric substrate 1 having both surfaces metallized. The dielec... | 04/22/2008 |
| 7343142 | Tuner A digital terrestrial tuner has an RF input connected to a filter arrangement, whose output signal is supplied to a zero intermediate frequency frequency changer. The filter arrangement comprises a plurality of signal paths of different frequency responses. The sign... | 03/11/2008 |
| 7333467 | Receiver circuit and method using selectively variable amplification for receiving time signals from different transmitters A time signal carrying encoded time information transmitted at a transmission frequency from any one of plural time signal transmitters is received, amplified, and evaluated to acquire the time information. The transmission frequency of the received time signal is d... | 02/19/2008 |
| 7330119 | Remote measurement employing RFID A measurement system includes a transceiver and a transponder. The transceiver is configured to send and receive radio frequency signals. The transponder is configured to receive radio frequency signals from the transceiver and to send radio frequency signals to the... | 02/12/2008 |
| 7330120 | Remote measurement of motion employing RFID A system and method for making measurements using and RFID system includes a transceiver, a transponder and a sensor configured within the transponder. The transceiver is configured to send and receive radio frequency signals. The transponder is configured to receiv... | 02/12/2008 |
| 7327775 | CDMA receiver A signal reception method including method and apparatus for receiving a signal, down converting the received signal through multi-tone down conversion to form an intermediate signal, and decoding the intermediate signal to extract data. In an embodiment, the receiv... | 02/05/2008 |
| 7327997 | High order trans-impedance filter with a single operational amplifier A trans-impedance filter circuit provided according to an aspect of the present invention contains an operational amplifier, a first resistor, a first capacitor, a second resistor, and a second capacitor. The second capacitor is connected in parallel between the inv... | 02/05/2008 |
| 7313377 | System, method, and circuit for dynamic range enhancement in a communication system A circuit includes one or more first amplifiers operable to amplify an incoming signal to produce an amplified incoming signal. The incoming signal is associated with a desired signal. The circuit also includes a controller. In response to the amplified incoming sig... | 12/25/2007 |
| 7309002 | Differential radio frequency identification reader Systems and techniques for reading a radio frequency identification transponder are described. A transmit coil produces a transmit field to power and interrogate the transponder. A reference coil and a receive coil furnish inputs to a differential amplifier, balance... | 12/18/2007 |
| 7292827 | System and method for providing a single-ended receive portion and a differential transmit portion in a wireless transceiver In an input/output circuit (200), a differential balun (250) is provided that has first and second balun inputs and first and second balun outputs. An antenna (230) is connected to the first and second balun outputs. A differential amplifier ( | 11/06/2007 |
| 7274913 | Transceiver system and method of using same A chip comprises and operational section and an input/output section. The operational section includes a controller. The input/output (I/O) section is coupled to the operational section. The I/O section comprises a transformer and a switching device. The transformer... | 09/25/2007 |
| 7269391 | Tunable transceiver front end A transceiver front end includes a transmit/receive (T/R) switch, a first balun, a second balun, a low noise amplifier, a power amplifier, and compensation circuitry. The T/R switch is operably coupled to an antenna for receiving inbound radio frequency (RF) signals... | 09/11/2007 |
| 7260377 | Variable-gain low noise amplifier for digital terrestrial applications A multi-stage amplifier assembly configured to receive a terrestrial digital television (“DTV”) input signal including multiple frequency channels. The amplifier assembly optionally includes a PIN diode coupled across differential inputs to a first stage of the ... | 08/21/2007 |
| 7253689 | Low distortion amplifier A low distortion amplifier. The novel amplifier includes a first transistor Q1 having first and second output terminals and an input terminal adapted to receive an input signal, and a second transistor Q2 having first and second output terminals and an... | 08/07/2007 |
| 7217987 | Semiconductor device and manufacturing the same A semiconductor device includes a transmission power amplifier having cascaded MOSFET amplification stages disposed over a main surface of a semiconductor substrate. A CMOSFET control circuit controls the amplification stages. A first capacitor is also provided havi... | 05/15/2007 |
| 7212586 | Direct conversion RF transceiver for wireless communications A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down converted to base band frequencies and base band signals to be up converted to wideband RF signals prior to transmission without requiring conversion to an interm... | 05/01/2007 |
| 7212584 | Distortion compensator A distortion compensator compensates for distortion arising in an amplifier that amplifies a signal with improved efficiency. The distortion compensator includes a signal level detector which detects the level of a signal to be amplified by an amplifier, a distortio... | 05/01/2007 |
| 7209727 | Integrated circuit radio front-end architecture and applications thereof An integrated RF front-end architecture is disclosed. Such an integrated RF front-end architecture includes a multi-tap balun, a low noise amplifier and a power amplifier core. The multi-tap balun includes a single-ended primary winding and a symmetrical multi-tap s... | 04/24/2007 |
| 7200373 | Antenna detection and diagnostic system and related method An antenna detection and diagnostic system and associated method, including current and voltage detection circuits, are disclosed for detecting antenna failure mechanisms for integrated radio receivers. Integrated current limit detection circuitry is disclosed that ... | 04/03/2007 |
| 7199652 | Amplifier; and transmitter and communication device incorporating the same The present invention provides an amplifier for amplifying a high-frequency signal and outputting an amplified signal. The amplifier includes: an amplification element which is a bipolar transistor or a field-effect transistor; and an inductor connected between a ba... | 04/03/2007 |
| 7190260 | Reaction advantage anti-collision systems and methods A vehicle anti-collision system and method for is disclosed which provides drivers with additional time in which to react to significant roadway events which often precede accidents. The simplest implementation of the system and method (Phase I) employs a brake peda... | 03/13/2007 |
| 7184735 | Radio frequency integrated circuit having symmetrical differential layout A radio frequency circuit includes a first differential RF path and a second differential path. The first differential RF path includes at least one RF block that includes a first differential section and a second differential section, wherein the first differential... | 02/27/2007 |
