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6374092 Efficient multimode power amplifier  
An amplifier apparatus for a multimode mobile communication device includes a carrier amplifier (114) and a peaking amplifier (116). The peaking amplifier has an adjustable bias level and is...
6359506 Linear modulation using a linear and a non-linear amplifier  
A power amplifier uses a modulation technique that varies amplitude of a drive signal and, optionally, phase angle of the drive signal. The power amplifier comprises two coupled amplifiers, a...
6359514 Switchable path power amplifier with combining network  
The present invention teaches a power amplifier having two output power devices and a mechanism for switching the output path between these two power devices. The first output power device is...
6356155 Multi-band amplifier having multi-tap RF choke  
An amplifier circuit formed on a single semiconductor substrate includes a first amplifier having at least one stage for amplifying signals within a first frequency band; a first amplifier having...
6346859 Microwave amplifier with reduced beat noise  
A microwave amplifier includes a bias circuit including a micro-strip line and a capacitor for biasing an output line of a FET with a DC voltage, and a filter block implemented by a...
6344777 Highly efficient compact ultra-high power source  
Greater levels of microwave and millimeter microwave frequency power is achieved in a new power amplifier structure in which sixteen MMIC amplifiers are supported in a 4×4 row by column matrix and...
6344774 Integrated power amplifier which allows parallel connections  
An integrated power operational amplifier can alternatively be operated in a master or a slave mode, such that a master amplifier can be connected in parallel with one or more slave amplifiers....
6342815 Manufacturable HBT power distributed amplifier for wideband telecommunications  
A power distributed amplifier that provides a high power output and a wide bandwidth. The amplifier includes an input and output load termination resistors opposite respective input and output...
6333682 High frequency low loss power amplifier combiner  
A conductive element (FIG. 1, 220) incorporates a wide end portion (230) which is subdivided into a set of low impedance coupling paths (235) separated by one of the planar grooves (250). Each of...
6320462 Amplifier circuit  
An RF amplifier includes a peak amplifier signal path, a carrier amplifier signal path and a delay line which equalizes the time delay between the peak and carrier amplifier signal paths to...
6317002 Circuit for efficiently producing low-power radio frequency signals  
A multiple power low power radio frequency amplifier. A first transistor amplifies a radio frequency signal at a substantially peak efficiency. The amplified signal is fed to a first impedance...
6310520 High slew-rate operational amplifier architecture  
An amplifier architecture wherein a primary or main operational amplifier is combined with a secondary or auxiliary high power operational amplifier to maintain the charge on a large load...
6300835 Power amplifier core  
A power amplifier core (40) for amplifying RF signals is provided. The power amplifier core (40) includes a first string of FET cells (46) for amplifying the RF signal. The FET cell string...
6300669 Semiconductor integrated circuit device and method of designing same  
A semiconductor integrated circuit device comprises a multiple-stage amplifier including a plurality of transistors. The multiple-stage amplifier has a first stage comprising a plurality of...
6298244 Dual-band, dual-mode power amplifier  
A power amplifier circuit has a driver amplifier stage including a low band driver amplifier and a high band driver amplifier. A final amplifier stage includes a linear mode amplifier for...
6297694 High frequency power amplifier  
A dual band system high frequency power amplifier has biasing circuits and a bias switching circuit, each circuit having heterojunction bipolar transistors (HBTs) so that the high frequency power...
6294956 System and method for producing amplified signal(s) or version(s) thereof  
A signal amplification system involves transforming at least one signal to be amplified into at least one transformed signal which is amplified and the resulting amplified transformed signal(s)...
6288608 Radio frequency power amplifier for a battery powered handset unit of a wireless communications system  
A radio frequency power amplifier for a battery powered handset unit of a wireless communications system having a low power signal amplification path and a high power signal amplification path....
6281756 Transistor with internal matching circuit  
An internally impedance matched transistor circuit prevents low frequency oscillation during high frequency band operation. Field effect transistors and corresponding oscillation-preventing...
6275111 Power amplifier having two-dimensional FET array  
A two-dimensional FET array (102) within a Q-band power amplifier module is presented. Array (102) has a plurality of substantially identical one-dimensional FET arrays (106) substantially...
6262629 High efficiency power amplifier having reduced output matching networks for use in portable devices  
A power amplifier includes a carrier amplifier path and a peaking amplifier path. The carrier amplifier path includes a carrier amplifier (208), and an impedance transforming network (214). The...
6259335 Combining network to implement a power amplifier having monolithically integrated planar interconnect and transistors  
An umbrella-shaped matching network (10, 14, 16) for matching phase and impedance in a power amplifier (2). The matching network (10, 14, 16) employs rounded corners (22). The rounded corners (22)...
6252463 High-frequency switch, adjustable high-frequency switch, and adjustable high-frequency power amplifier  
A high-frequency switch is configured of first and second bipolar transistors connected into a cascode configuration. Current to be supplied from the collector of the second bipolar transistor at...
6242984 Monolithic 3D radial power combiner and splitter  
An SSPA module in accordance with the present invention comprises a signal input (102), and a radial splitter (100) connected to the signal input (102) comprising a plurality of radially extending...
6242985 Composite transistor device  
A semiconductor device for high-frequency power amplification includes a pair of first and second composite transistors each comprised of parallel-connected transistor cells each having...
6232839 Voltage-controlled amplifier having compensation for gain control imbalance  
A voltage-controlled amplifier unit 2 amplifies an input signal with a gain variable according to a controlled voltage. A basic amplifier unit 1 amplifies the input signal with at least one fixed...
6232840 Transistor amplifier having reduced parasitic oscillations  
A transistor device having a plurality of transistor cells. Each one of the cells has a control electrode for controlling a flow of carriers through a semiconductor. The device has an input node....
6225866 Series connected multi-stage linear FET amplifier circuit  
A sampling circuit is arranged so that source voltages VDD and VEE, which are to be applied to two inverters at the latter stages in a signal path on the p-channel transistor side, are shifted to...
6225865 Signal switching arrangement  
A switching circuit for switching VHF/UHF signals. The switching circuit includes an amplifier for amplifying an input signal, a switching device for coupling the amplified signal to an output, a...
6211732 Comb linear amplifier combiner (CLAC)  
The present invention is a Comb linear amplifier combiner (CLAC) apparatus that allows one or more transmitters to transmit through one transmit antenna. The CLAC apparatus passes low powered...
6208210 Advanced hybrid power amplifier design  
A hybrid radio frequency (RF) power device is provided which comprises: a flange (10) and an arrangement of die blocks (30) disposed about the flange (10), where the arrangement of die blocks (30)...
6201445 High frequency power amplifier  
A high frequency power amplifier includes: a pair of power amplifying elements; a power divider, provided in the vicinity of an input terminal of the high frequency power amplifier, for supplying...
6188284 Distributed gain line driver amplifier including improved linearity  
Improved linearity in a line driver amplifier is realized by employing one or more amplifier sections each including an adaptive gain amplifier connected in parallel with a distributed gain...
6188281 Linear transconductance circuits having class AB amplifiers parallel coupled with concave compensation circuits  
The present invention teaches a variety of transconductance circuits formed having a class AB transconductor amplifier coupled in parallel with at least one concave compensation circuit. When the...
6181204 Linear and multi-sinh transconductance circuits  
The present invention teaches a variety of transconductance circuits formed having two or more class AB transconductor amplifiers coupled in parallel. The class AB transconductor amplifiers have...
6181205 Compact power amplifier for microwave circuits  
A power amplifier for microwave signals, the amplifier comprising a plurality of identical transistors, wherein: the grid buses of two adjacent transistors are interconnected by a grid matching...
6181208 Switchable path power amplifier with schotky diode combining network  
The present invention teaches a power amplifier having two output power devices and a mechanism for switching the output path between these two power devices. The first output power device is...
6163220 High-voltage, series-biased FET amplifier for high-efficiency applications  
An integrated circuit two-stage power amplifier provides a high-voltage, series-biased FET amplifier for high-efficiency applications. An input is connected to an input matching network, and a...
6160447 Amplifier having redundancies  
A redundant balanced amplifying apparatus. The apparatus comprises a signal path. A portion of the signal path is split into a first and second sets of signal branches. The first and second sets...
6160454 Efficient solid-state high frequency power amplifier structure  
A power amplifier uses a plurality of solid-state amplifiers (FIGS. 2 and 3, 140) arranged in a parallel manner to form a power amplifier module (10). Each solid-state amplifier is adhered to a...
6157258 High frequency power amplifier  
A power amplifier that provides wide-band, high efficiency, high voltage, HF power amplification over a large dynamic operating range. In one embodiment, the power amplifier includes a driver...
6157257 Low power folding amplifier  
A folding amplifier in which a single tail current is used to service all differentially coupled transistor pairs in the amplifier. The input signal applied to each differential pair of...
6150882 RF low noise amplifier  
In a communication transceiver receiving a signal from a signal source defined by a source impedance between first and second nodes, an amplifier is provided having an input impedance matched to...
6144254 Low-noise amplifier with switched gain and method  
A low noise radio frequency amplifier is switchable between a low gain state and a high gain state. A first, common-emitter transistor is active in the high gain state and inactive in the low gain...
6133788 Hybrid Chireix/Doherty amplifiers and methods  
Two amplifiers that are driven using outphasing modulation are coupled to one another so that the amplifiers affect each other's effective load line. The two amplifiers can maintain efficiency...
6128479 Radio frequency amplifier structure  
A radio frequency (RF) circuit (300) includes two parallel sections (310, 312) that are designed to function collectively through the use of a signal splitter/switching circuit (200) and a signal...
6124758 RF power amplifier control system  
An RF power amplifier control system is presented herein. The system includes a group of power amplifier modules for amplifying an RF signal. Each group includes first and second group controllers...
6121842 Cascode amplifier  
A cascode amplifier formed as an integrated circuit on a III-V substrate. The substrate has a pair of elongated active regions formed along a pair of laterally spaced active regions of a surface...
6118343 Power Amplifier incorporating single drain switch and single negative voltage generator  
A dual band power amplifier circuit comprising first and second power amplifiers each operative to amplify an RF signal of a particular frequency range at an output terminal thereof, wherein the...
6114911 Power amplifier  
A power amplifier has an input signal splitting part for splitting the input signal into two output signals each having equal power and phase difference of 180 degrees with respect to each other....