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 |