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9035701 Thermally coupled current limiter  
This disclosure relates generally to radio frequency (RF) amplification devices and methods of limiting an RF signal current. Embodiments of the RF amplification device include an RF amplification...
9024689 Electronic system—radio frequency power amplifier and method for self-adjusting bias point  
A radio frequency (RF) power amplifier is disclosed. The RF power amplifier includes a bias circuit, an output stage circuit and dynamic bias controlling circuit. The bias circuit receives a...
9013238 Radio frequency power amplifier and electronic system  
A radio frequency (RF) amplifier is disclosed. The RF power amplifier includes a bias circuit, an output-stage circuit and a RF compensation circuit. When a first system voltage is larger than a...
9007130 Systems and methods for boosting a received AC signal using a power amplifier including phase conditioners  
A power amplifier configured to boost an AC signal. The power amplifier includes a first transistor, a second transistor, a first inductor connected between the first transistor and a voltage...
8994452 Low-noise high efficiency bias generation circuits and method  
A bias generation method or apparatus defined by any one or any practical combination of numerous features that contribute to low noise and/or high efficiency biasing, including: having a charge...
8988149 Amplifier circuit and method of amplifying a signal in an amplifier circuit  
An amplifier circuit, comprising: an input, for receiving an input signal to be amplified; a power amplifier, for amplifying the input signal; a switched power supply, having a switching...
8989679 Dual use transistor  
A circuit for amplifying radio frequency signals comprising: a terminal for connection to an antenna; a common amplifier arranged in a common-gate configuration between a first node and said...
8970301 Method for low power low noise input bias current compensation  
Low power low noise input bias current compensation for an amplifier input stage is provided by recycling the tail current of the differential pair transistors. A local amplifier regulates the...
8963643 Method and system for providing automatic gate bias and bias sequencing for field effect transistors  
A feedback gate bias circuit for use in radio frequency amplifiers to more effectively control operation of LDFET, GaNFET, GaAsFET, and JFET type transistors used in such circuits. A transistor...
8958576 Dynamically biased amplifier  
An amplifier including an input stage, an output stage, an adjustable bias current generator and a level detector. The input stage may receive and amplify or buffer an input signal. The input...
8957729 Memory structure having taps and non-unitary delays between taps  
A method and apparatus for memory modeling in a pre-distortion architecture are disclosed. In one embodiment, a memory model has a plurality of branches. Each branch receives a different output...
8952765 System and methods of bimodal automatic power and frequency tuning of RF generators  
A radio frequency generator includes a power control module, a frequency control module and a pulse generating module. The power control module is configured to generate a power signal indicating...
8947125 Fast, low power comparator with dynamic bias background  
A comparator circuit comprising an operational amplifier configured to compare a difference between a switching voltage and a reference voltage, and a dynamically adjustable bias current generator...
8928412 Precise current source circuit for bias supply of RF MMIC gain block amplifier application  
A current source circuit includes a first transistor Q1, a second transistor Q2, a first resistor R1, and a second resistor R2. The first transistor Q1 has a first terminal (collector) coupled...
8928403 Envelope path processing for envelope tracking amplification stage  
The invention relates to a method of calibrating an envelope path and an input path of an amplification stage of an envelope tracking power supply, the method comprising matching the envelope path...
8912825 Sense amplifier system and sensing method thereof  
A sense amplifier system and sensing method thereof are provided. The proposed sense amplifier system includes plural sense amplifiers, each of which includes a first switch having a first...
8912851 Apparatus and method for providing amplifier linearity information  
An apparatus for providing a linearity information associated with an amplifier includes an operating state determinator and an evaluator. The operating state determinator is configured to obtain...
8907726 Voltage, current, and saturation prevention  
In one embodiment, saturation of the control system of a power amplifier is limited by comparing a control voltage at a first control node against a scaled battery voltage, and then drawing an...
8902002 Adaptive biasing scheme for an amplifier  
There is provided a bias arrangement for an amplifier adapted to amplify a varying input signal, the arrangement comprising a control circuit arranged to adaptively vary a bias current to the...
8896382 Amplification device and amplification method  
In an amplification device, an amplification unit has a transistor and amplifies a signal that is input. A control unit applies, when a power source is turned on, a pinch-off voltage to a gate of...
8896383 Enhanced pulse frequency modulation (PFM) control mode for switching regulators  
A variable supply rail generator is described. The variable supply rail generator includes a regulator configured to use an estimated load current for a power amplifier to optimize efficiency. The...
8890617 Bias current monitor and control mechanism for amplifiers  
Techniques for monitoring and controlling bias current of amplifiers are described. In an exemplary design, an apparatus may include an amplifier and a bias circuit. The amplifier may include at...
8890619 PIM compensation in a receiver  
The present disclosure relates to compensation for Passive Intermodulation (PIM) distortion in a receiver. In one embodiment, a main receiver receives a radio frequency receive signal and outputs...
8890616 Power amplifier system with a current bias signal path  
Power amplifier (PA) systems are typically comprised of a signal path integrated circuit (IC) and a power control IC. Advanced CMOS technologies may allow smart integration of such ICs into a...
8884697 Amplifying device  
An efficient amplifying device is achieved. An amplifying device that amplifies a signal subject to amplification is configured as follows. That is, an amplifier (PA 5) that amplifies a signal is...
8884696 Control circuit and method for controlling an operation of a power amplifier  
A control circuit and a method for controlling an operation of a power amplifier core are provided. The power amplifier core is switchable between an envelope tracking operation mode and a...
8884703 VRAMP limiting using resistors  
Power amplification devices are described, which are configured to amplify a radio frequency (RF) transmission signal. The power amplification device includes a voltage regulation circuit and a...
8884702 Power amplifier with supply switching  
To improve upon efficiency of a transmitter's power amplifier during low power operation, a switching system is used to selectively switch between different (e.g., normal and reduced) power...
8874053 Low variation current multiplier  
Aspects of the present disclosure relate to a current multiplier that can generate an output current with high linearity and/or high temperature compensation. Such current multipliers can be...
8872588 Amplifier  
An amplifier comprising at least one amplifying element (20a, 25a) and a biasing circuit (32a, 32b) for biasing the or each amplifying element with a bias voltage is disclosed. The biasing circuit...
8854142 Bias circuit and power amplifier having the same  
There are provided a bias circuit supplying different levels of bias power according to respective power modes through a simple circuit configuration, and a power amplifier having the same. The...
8855336 System and method for biasing active devices  
An apparatus for generating a bias voltage for an active device is disclosed, comprising a first voltage source, a capacitive element adapted to generate a charge in response to the first voltage...
8854141 RF amplifier module, integrated circuit device, wireless communication unit and method therefor  
A radio frequency (RF) amplifier module has a digitally controllable amplifier to receive a first biased signal, a further biased signal, and a digital control signal including a less significant...
8854143 Bias circuit  
Proposed is a bias circuit for a transistor in a C class amplifier. The bias circuit comprises: a class AB amplifier bias voltage generating means adapted to generate a bias voltage at an output...
8847686 Electronic system, RF power amplifier and temperature compensation method thereof  
A radio frequency (RF) power amplifier is disclosed. The RF radio power amplifier includes a bias current generating unit, a first impedance unit, a second impedance unit, a third impedance unit...
8847688 Over-voltage protection in a high-swing amplifier  
A method for processing signals may include comparing an output voltage signal in an output stage of an amplifier with a reference voltage signal. If the output voltage signal is greater than the...
8823456 Cancellation of gain change due to amplifier self-heating  
A system including a power amplifier having a first gain, a preamplifier having a second gain, a first temperature sensor configured to sense the temperature of the power amplifier, and a bias...
8816774 Power amplifier system  
Disclosed herein is a power amplifier system including: a power amplifier; a power controlling unit providing driving voltage and driving current corresponding to a preset reference voltage to the...
8816775 Quiescent current determination using in-package voltage measurements  
Apparatus, systems, and fabrication methods are provided for biasing amplifier arrangements inside device packages to a target quiescent current. In one embodiment, an amplifier device has an...
8810317 High frequency circuit and high frequency module  
A high frequency circuit and a high frequency module are provided, in which the accuracy of compensation operation is improved in compensating by digital control. The amplification gain of an...
8810318 Power amplifier  
There is provided a power amplifier. The power amplifier includes an amplification unit including at least one amplification device; a power generation unit generating an input signal supplied to...
8803612 Low-noise amplifier with high linearity  
A low-noise amplifier with high linearity has two common source FET amplifying stages, where the amplifier performance is linearized by use of a second stage active biasing circuit including a...
8791761 Electronic system, RF power amplifier and output power compensation method thereof  
A radio frequency (RF) power amplifier is disclosed. The power amplifier includes an output stage circuit, an exponential type bias circuit and a voltage-current transformation circuit. The output...
8791760 Closed loop bias control  
This disclosure relates to radio frequency (RF) amplification devices and methods for amplifying an RF input signal. To set the quiescent operating level of the RF output signal, a bias signal to...
8781028 Integrated receiving circuit and method for radiofrequency and high speed signals  
Integrated receiving circuit for radiofrequency signals an amplifying element using the multiplication zone of a reverse biased semiconductor junction operating in Geiger mode for amplifying an...
8774739 Multi-mode power supply regulator for power amplifier control  
A radio frequency (RF) power amplification system in which a combination of a linear voltage regulator having a PFET pass device and a DC-DC converter having an NFET pass device is used to supply...
8749309 Gate-based output power level control power amplifier  
A gate power control technique for a power amplifier (PA) provides practical improved efficiency at backed-off power levels. It can be applied to the main gate of the output stage of the PA, the...
8736376 Power amplifier module having bias circuit  
There is provided a power amplifier module having a bias circuit, in which a bias power is supplied to an amplifier by differently setting an impedance between an input signal terminal and a...
8736377 RF pulse edge shaping  
A radio frequency (RF) generation module includes a power control module that receives first and second desired amplitudes of an output of the RF generation module in first and second respective...
8712344 Transmitter having a programmable amplifier operating class  
A transmitter is adapted to be programmed to select an amplifier operating class for the transmitter out of a plurality of amplifier operating classes. The transmitter is also adapted to operate...