Patent application number | Description | Published |
20090280755 | RADIO FREQUENCY COMMUNICATION DEVICES AND METHODS - One embodiment relates to a radio frequency (RF) communication device. The RF communication device includes a coupler having a plurality of ports and an adjustable termination coupled to one of the plurality of ports. The adjustable termination is adjustable based on an operating condition of the RF communication device. Other methods and systems are also disclosed. | 11-12-2009 |
20100079209 | SETTING AN OUTPUT LEVEL OF AN AMPLIFIER APPARATUS - An amplifier module comprises an amplifier with an output and a coupling element for receiving a signal at the output. It also comprises a control input for receiving a control signal and a power detector which can be changed over and is intended to determine a power signal from the signal. The power detector which can be changed over is coupled to the control input and is set up in such a manner that a dynamic range of the power detector can be changed on the basis of the control signal. | 04-01-2010 |
20110250853 | Operating point setting of an amplifier - Embodiments related to the setting of an operating point of an amplifier are described and depicted. | 10-13-2011 |
20120071120 | Adaptive Adjustment of Active Area for Power Amplifier - One embodiment of the present invention relates to a transmission circuit configured to dynamically adjust a number of active transistor cells within a power amplifier based upon a signal quality measurement determined from a feedback. The transmission circuit comprises a transmission chain having a power amplifier configured to provide an output signal. A feedback loop extends from the output of the power, amplifier to a control circuit and is configured to provide measured information about output signal (e.g., phase, amplitude, etc.) to the control circuit. The control circuit utilizes the measured signal information to evaluate a measured signal quality of the output signal. The control circuit dynamically adjusts a number of active transistor cells within a power amplifier based upon a signal quality measurement until the power amplifier is optimized to operate at an operating point for low current and good transmission quality. | 03-22-2012 |
20120142289 | Circuit Arrangement and Method for Setting an Analog Output Signal - A circuit arrangement includes a signal processing unit and a regulation unit. The signal processing unit processes an input signal to form an analog output signal. The regulation unit is coupled to the signal processing unit in order to produce a digital regulation signal as a function of the analog output signal for regulation of the analog output signal. | 06-07-2012 |
20120149442 | METHOD AND APPARATUS FOR OPTIMIZING OUTPUT POWER LEVELS IN POWER AMPLIFIERS - Some embodiments discussed relate to an apparatus comprising a power amplifier module. The power amplifier module includes a plurality of sensors, and a first digital communication port configured to provide a monitor signal from at least one of the plurality of sensors. The apparatus includes a transceiver module coupled to provide an signal to an input of the power amplifier the transceiver module including a second digital communication port configured to receive the monitor signal from the first digital communication port, a processing unit configured to generate at least one of a bias control signal and a back-off signal dependent upon the monitor signal, and a power controller to receive the at least one of bias control signal and the back-off signal and provide at least one further input signal to the power amplifier based on at least one of the bias control signal and the back-off signal. | 06-14-2012 |
20120219048 | Joint Adaptive Bias Point Adjustment and Digital Pre-Distortion for Power Amplifier - One embodiment of the present invention relates to a method and apparatus are provided herein for reducing the power consumption of a transmission chain while maintaining an acceptable figure of merit (e.g., linearity). In one embodiment, an adaptive biasing element is configured to perform adaptive biasing to reduce current consumption of a transmission chain by adjusting the operating point of one or more transmission chain elements (e.g., power amplifier, mixer, etc.). However, since adaptive biasing may reduce the linearity of a transmitted signal, its use is limited by the degradation of figure of merit caused by the introduced non-linearities. Accordingly, a pre-distortion element may be configured to perform adaptive digital pre-distortion (DPD) on a transmission chain input signal to account for non-linearities generated through the adaptive biasing, therefore allowing the adaptive biasing to further reduce the current consumption while maintaining an acceptable figure of merit. | 08-30-2012 |
20130226489 | DISTORTION ESTIMATION APPARATUS AND METHOD - A distortion estimation apparatus for estimating distortion includes a feedback element, a nonlinearity determiner, and a distortion simulator. The feedback element provides a feedback signal derived from a distorted output signal of the distorting element. A signal processing quality of the feedback element is lower than an associated signal property of the distorted output signal. The nonlinearity determiner receives the feedback signal and an input signal to the distorting element or a signal derived from the input signal. The nonlinearity determiner determines an estimated transmission characteristic of the distorting element by relating signal properties of the feedback signal and the input signal or the signal derived from the input signal. The distortion simulator estimates the distortion caused by the distorting element based on the input signal or the signal derived from the input signal and the estimated transmission characteristic. | 08-29-2013 |
20140133526 | CIRCUIT, TRANSCEIVER AND MOBILE COMMUNICATION DEVICE - A circuit for providing a bias signal for a power amplifier includes a first input, a second input and an output. The first input is configured to receive an input signal to be amplified by the power amplifier. The second input is configured to receive the amplified input signal. The output is configured to provide the bias signal. | 05-15-2014 |
20150023445 | Systems and Methods Utilizing Adaptive Envelope Tracking - A communication system utilizing adaptive envelope tracking includes a transmit path, a feedback receiver, a parameter component and an envelope tracking component. The transmit path is configured to generate a transmit signal. The feedback receiver is configured to generate a feedback signal from the transmit signal. The parameter component is configured to generate linearity parameters from the feedback signal and the baseband signal. The envelope tracking component is configured to generate a supply control signal having time delay adjustments. | 01-22-2015 |
20150030056 | OPERATING POINT SETTING OF AN AMPLIFIER - Embodiments related to the setting of an operating point of an amplifier are described and depicted. | 01-29-2015 |
Patent application number | Description | Published |
20080315956 | Saturation Handling - Saturation handling for preventing a power amplifier from going into a saturation condition is disclosed. | 12-25-2008 |
20090088100 | Method and Apparatus for Regulating a Power Amplifier - A method for regulating a power amplifier for operation in a timeslot data transmission system comprises providing the power amplifier with a bias for setting an operating point for the power amplifier, wherein the bias has a respective bias value. In addition, a supply voltage control signal is provided, wherein a supply voltage value is set such that a prescribed output power value of the power amplifier is attained. The bias value is changed to a new bias value. These steps are repeated until a prescribed criterion is met, but for at least one subsequent timeslot. Next the bias value of the subsequent timeslot is set to the bias value of the previous timeslot. | 04-02-2009 |
20090163155 | METHODS FOR CALIBRATING A TRANSMITTER, AND RADIO TRANSMITTER - In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode. | 06-25-2009 |
20100008410 | Continuous Open Loop Control to Closed Loop Control Transition - This disclosure relates to a continuous open loop control to closed loop control transition. | 01-14-2010 |
20100069026 | Transmitter with Hybrid Closed Loop Power Control - Systems and method for implementing a transmitter with hybrid closed loop power control in a communication device. | 03-18-2010 |
20120169424 | 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 information describing a gain of the amplifier for at least one bias condition of the amplifier. The evaluator is configured to obtain the linearity information based on both the information describing the gain of the amplifier and information about the at least one bias condition of the amplifier using a gain-bias characteristic of the amplifier. A bias circuit including the apparatus for providing the linearity information is also disclosed. A corresponding method for providing the linearity information includes: using the information describing the gain of the amplifier and the information about the at least one bias condition with the gain-bias characteristics to determine a relation of a current operating point described by the information with respect to the gain-bias characteristic; and deriving the linearity information from said relation. | 07-05-2012 |
20120276862 | METHODS FOR CALIBRATING A TRANSMITTER, AND RADIO TRANSMITTER - In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode. | 11-01-2012 |
20130029616 | Transmitter with Hybrid Closed Loop Power Control - Systems and method for implementing a transmitter with hybrid closed loop power control in a communication device. | 01-31-2013 |
Patent application number | Description | Published |
20090128233 | SHARED LINEARITY MAINTENANCE IN POWER AMPLIFIERS - In some embodiments, a circuit includes a power amplifier including an input terminal configured to receive an input signal and an output terminal to provide an RF voltage, the output terminal coupled to a load, a current sensor configured to sense the current drawn by the power amplifier and provide a first sensor output signal dependent upon current consumption when the current exceeds a predetermined current threshold, a voltage sensor configured to sense the output power of the power amplifier and provide a second sensor output signal when the RF voltage during up ramp falls below a predetermined threshold voltage, and a summing circuit configured to receive the first and second sensor output signals and provide a feedback signal including a combination of a power dependent contribution and either of a voltage dependent contribution or a current dependent contribution. | 05-21-2009 |
20090298448 | STRATEGY FOR USING THE ENVELOPE INFORMATION WITHIN A CLOSED LOOP POWER CONTROL SYSTEM - A power control system includes a reference path filter used to suppress high frequencies in an input signal and generate a filtered envelope signal, a reference path amplifier to scale the filtered input signal based on a gain signal and generate a reference signal, a signal path amplifier to amplify an RF modulated signal and generate a signal path output signal scaled by a gain of an actuator signal, and a power detector to detect a power associated with the signal path output signal. The system includes an ADC to receive, pre-filter and convert the detected envelope signal into a measurement signal, and a comparator block to receive the reference signal and the measurement signal, and generate an error signal based on the difference, and a controller to generate the actuator signal for controlling the gain of the signal path amplifier based on the error signal. | 12-03-2009 |
20110280282 | METHOD AND APPARATUS FOR OPTIMIZING OUTPUT POWER LEVELS IN POWER AMPLIFIERS - Some embodiments discussed relate to an apparatus comprising a power amplifier module. The power amplifier module includes a plurality of sensors, and a first digital communication port configured to provide a monitor signal from at least one of the plurality of sensors. The apparatus includes a transceiver module coupled to provide an signal to an input of the power amplifier the transceiver module including a second digital communication port configured to receive the monitor signal from the first digital communication port, a processing unit configured to generate at least one of a bias control signal and a back-off signal dependent upon the monitor signal, and a power controller to receive the at least one of bias control signal and the back-off signal and provide at least one further input signal to the power amplifier based on at least one of the bias control signal and the back-off signal. | 11-17-2011 |