Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Number | Title | Issue Date |
| 6838937 | Method and system for implementing autonomous automatic gain control in a low noise broadband distribution amplifier Provided is a system for implementing gain control in an amplification module comprising a first stage amplifier having a number of first stage input and output ports. The first stage amplifier is configured to provide first stage amplification to a received input s... | 01/04/2005 |
| 6836183 | Chireix architecture using low impedance amplifiers Circuits and methods for use in amplifying amplitude and phase modulated signals. A circuit uses a combiner with dual parallel signal amplifiers feeding it. The signal amplifiers have a low output impedance while the combiner does not provide any isolation between i... | 12/28/2004 |
| 6831511 | Distortion cancellation for RF amplifiers using complementary biasing circuitry An apparatus for improving linearity of an RF signal comprising: (a) a splitter configured to receive an input RF signal, and configured to split the input RF signal into two RF signals comprising a first input RF signal, and a second input RF signal; (b) an over-bi... | 12/14/2004 |
| 6828861 | Power amplifier with distributed capacitor A power amplifier integrated circuit includes a plurality ofheterojunction bipolar transistors having a plurality of bases, a plurality of ballast resistors, and a capacitor. Each ballast resistor is connected between a base of the transistors and a DC node to which... | 12/07/2004 |
| 6825719 | RF power amplifier and methods for improving the efficiency thereof A radio frequency power amplifier characterized by an efficiency and operative to produce an output signal at a desired output power includes an outphasing system with shunt reactance and a controller. The outphasing system with shunt reactance has a variable phase ... | 11/30/2004 |
| 6826064 | Stable voltage converter with multiple pulse width modulated channels A stable voltage converter is described. The stable voltage converter has an error amplifier, a plurality of subtraction circuits, a plurality of converter channels, and a plurality of current sensors. The error amplifier compares a reference voltage and an average ... | 11/30/2004 |
| 6822516 | High speed high gain amplifier An electronic device is provided such as an amplifier, for example, having improved gain and transconductance and low output impedance. The device includes a primary amplifier configured to carry an operating load. The primary amplifier includes an input for receivi... | 11/23/2004 |
| 6822517 | Power amplifier module A power amplifier module comprises a plurality of amplifier stages, each including a reference amplifier for emulating the operation of the amplifier. The current flowing to the base of a bipolar transistor that forms each reference amplifier depending on an input p... | 11/23/2004 |
| 6819171 | Amplifier arrangement Limiting amplifier (116) removes amplitude variations from the input signal (110). Splitter (120) provides the constant amplitude signal to each of amplifiers (124A to 124H) via a respective switch (122A to 122H). The... | 11/16/2004 |
| 6819176 | High power, wide bandwidth operational amplifier A high bandwidth operational amplifier architecture has three control loops, which are combined via a voltage-follower-configured field effect transistor. The first control loop is an instantaneous main amplification path and employs positive feedback-based Vgs corr... | 11/16/2004 |
| 6816008 | Quasi-linear multi-state digital modulation through non-linear amplifier arrays At least one amplifier is selected from a first bank of non-linear amplifiers. At least one amplifier is selected from a second bank of non-linear amplifiers. The number of amplifiers selected from the first and second banks remains constant. Using the selected ampl... | 11/09/2004 |
| 6809594 | Ultra broadband low noise amplifier with matched reactive input impedance A low noise amplifier (LNA) for amplifying an input signal communicated over a transmission line having an impedance. The LNA includes a current sensing amplifier having an input to connect to the transmission line. The current sensing amplifier has an input impedan... | 10/26/2004 |
| 6806768 | Balanced power amplifier with a bypass structure A balanced power amplifier circuit arrangement comprises a driver amplifier stage (22) adapted to receive and amplify a signal. The amplified signal is input to a first coupler (26). The first coupler (26) produces an in-phase signal and an out-... | 10/19/2004 |
| 6804500 | High frequency circuit using high output amplifier cell block and low output amplifier cell block A high frequency circuit capable of realizing a power amplifier with a wide dynamic range in which it is hard to degrade the power addition efficiency at low output is formed by using a high output amplifier cell block configured to amplify input signals at a time o... | 10/12/2004 |
| 6801098 | Group delay equalizer integrated with a wideband distributed amplifier monolithic microwave integrated circuit A wideband distributed or feedback amplifier monolithic microwave integrated circuit (MMIC) is disclosed that contains an integrated group delay equalizer circuit to compensate for the group delay variation of the amplifier circuitry. The MMIC amplifier is capable o... | 10/05/2004 |
| 6801085 | System and method for activating gain stages in an amplification module A system is provided for activating gain stages in an amplification module. The system includes an amplification module including a first group of amplifiers. Inverting output ports of each of the first group of amplifiers are coupled to a module inverting output te... | 10/05/2004 |
| 6798294 | Amplifier with multiple inputs A low noise amplifier (500) is provided for amplifying signals in a frequency band. The low noise amplifier (500) comprises several amplifying elements (505, 506) that share a load impedance (503) and a degeneration impedance (504)... | 09/28/2004 |
| 6799020 | Parallel amplifier architecture using digital phase control techniques An improved method and apparatus for using parallel amplifiers to efficiently amplify an information signal are disclosed. The improved apparatus utilizes digital signal manipulation techniques in optimizing the phase of the upconverted input signals provided to eac... | 09/28/2004 |
| 6798283 | Gigabit ethernet transceiver with analog front end Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-li... | 09/28/2004 |
| 6794934 | High gain wideband driver amplifier Methods and circuitry for implementing monolithic high gain wideband amplifiers. The invention implements an amplifier with a limiter that also performs a signal dividing function. In a specific embodiment, the limiter is designed to make available two in-phase outp... | 09/21/2004 |
| 6794938 | Method and apparatus for cancellation of third order intermodulation distortion and other nonlinearities Methods and apparatus are provided for substantially reducing and/or canceling nonlinearities of any order in circuits, devices, and systems such as amplifiers and mixers. In particular, methods and apparatus are provided for substantially reducing and/or canceling ... | 09/21/2004 |
| 6791407 | Switchable power amplifier A power amplifier having a first stage amplifier and a second stage amplifier, each stage of the power amplifier being configured in one of at least two power states based on a desired power output. When the first and second stages are configured in a first state, t... | 09/14/2004 |
| 6791417 | N-way RF power amplifier circuit with increased back-off capability and power added efficiency using selected phase lengths and output impedances An RF power amplifier circuit for amplifying an RF signal over a broad range of power with improved efficiency includes a carrier amplifier for amplifying an RF signal over a first range of power and with a power saturation level below the maximum of the broad range... | 09/14/2004 |
| 6788153 | Method of multiplexing column amplifiers in a resistive bolometer array A two dimensional array of resistive bolometers (B) is arranged in rows and columns. Amplifiers (A0, A1 etc) amplify signals obtained from the bolometers. Instead of providing one amplifier per column, a smaller number of amplifiers is used each of whi... | 09/07/2004 |
| 6784747 | Amplifier circuit An amplifier circuit and fabrication method including a bias input node, an RF input node, an RF output node, and a plurality of amplifier cells. Each cell has a plurality of discrete emitter contacts of a first conductivity type, a plurality of discrete base contac... | 08/31/2004 |
| 6781455 | High efficiency power amplifier The present invention discloses a high efficiency power amplifier comprising: an input matching unit for matching input signal; a first amplifying means for amplifying the signal outputted from the input matching unit; a second amplifying means for amplifying the si... | 08/24/2004 |
| 6774717 | Transmitter including a composite amplifier A composite amplifier includes a main power amplifier (10) and an auxiliary power amplifier (12), which are connected to a load (14) over a Doherty output network (16). Filters (26, 28) are provided for pre-filtering the amplifier ... | 08/10/2004 |
| 6771123 | Multichannel power amplifying A multichannel electrical power amplifying system constructed and arranged to distribute electrical power of amount P to a total load coupled thereto. The system includes a plurality n of power amplifier channels, coupling the power amplifying system to a portion of... | 08/03/2004 |
| 6765439 | Impedance matching for a power amplifier system One embodiment is a method for adjusting impedance of a power amplifier system comprising combining an output of a first power amplifier with an output of a second power amplifier via a coupler that couples an output connection of the first power amplifier with an o... | 07/20/2004 |
| 6756843 | Signal transmitter with pulse-controlled amplification A transmitter of radioelectric signals includes a plurality of amplifiers PA1, PA2 for amplifying a signal Sin whose frequency is included in a predetermined frequency band, said signal Sin alternately carrying information and being in the quiescent st... | 06/29/2004 |
| 6750707 | Multi-carrier RF amplifiers Apparatus including input ports for inputting a plurality of input signals different in frequency of carrier from one another, dividers for respectively dividing each of the plurality of input signals inputted to the input ports into plural form, and phase shifters ... | 06/15/2004 |
| 6750709 | Bipolar transistor-based linearizer with programmable gain and phase response system A bipolar transistor-based linearizer with programmable gain and phase response apparatus uses a splitter to separate an incoming RF signal into two equal components: in-phase (I) and quadrature (Q, ninety degrees delayed). The I signal then passes through a first b... | 06/15/2004 |
| 6747511 | Distributed amplifier with pi-configuration analysis and synthesis lines A distributed amplifier for wide-band, high power application is disclosed. The amplifier consists of an analysis module, a gain module and a synthesis module. In the analysis and synthesis modules, inductors such as transmission lines are connected to gain elements... | 06/08/2004 |
| 6747512 | Amplifier and tuner An amplifier which is suitable for use as a radio frequency low noise amplifier comprises first, second and third transconductance stages. The amplifier input is connected to the inputs of the first and third stages, whose outputs are connected together in anti-phas... | 06/08/2004 |
| 6747517 | Power-shifting rf amplifiers Apparatus (70, 80, 90) and method are provided for selectively proportioning, or hot-switching, rf power to a plurality of rf outputs. The method includes: splitting a single rf signal into a plurality of split rf signals using power splitters (12, 36, 38 | 06/08/2004 |
| 6744312 | Adaptive power amplifier system The present invention provides a power amplifier system in which one or more power amplifiers may be inserted. The occupancy of ports by power amplifiers is monitored by a controller. The system has a plurality of output lines, each with different electrical line ch... | 06/01/2004 |
| 6741126 | Low noise amplifier arrangement An amplifier arrangement (10) comprises an input node (24) and an output node (26). A plurality of amplifiers (20.1) to 20.4) are connected in respective parallel paths (28.1 to 28.4) extending between the input node ... | 05/25/2004 |
| 6737922 | N-way RF power amplifier circuit with increased back-off capability and power added efficiency using unequal input power division An RF power amplifier circuit for amplifying an RF signal over a broad range of power with improved efficiency includes a carrier amplifier for amplifying an RF signal over a first range of power and with a power saturation level below the maximum of the broad range... | 05/18/2004 |
| 6738432 | System and method for RF signal amplification A branched power amplifier circuit includes two or more amplifier segments or branches, each with a corresponding lossy modulator. The branched power amplifier may be dynamically resized by enabling different ones of its branches, to deliver peak efficiency at a num... | 05/18/2004 |
| 6737916 | RF amplifier system having improved power supply An RF amplifier system having improved power supply is presented and which includes a plurality of power amplifiers each having an output circuit for connecting a DC voltage source to one of a plurality of primary windings located on a first transformer. The first t... | 05/18/2004 |
