Infineon Technologies Ag

Qimonda Ag

Intel Corporation

Apple Inc.

Dialog Semiconductor Gmbh

Otto Schumacher

Thomas Hein

Aaron John Nygren

Martin Maier

Stephan Henzler

Peter Gregorius

Andreas Langer

Christian Kranz

Karthik S Gopalakrishnan

Bernhard Sogl

Dirk Scheideler

Fabio Rigoni

Olivier Girard

Hartmut Sturm

Joao Paulo Trierveiler Martins

Javier Argüelles

Joao Martins

A digital envelop tracker for a power amplifier. The digital envelop tracker includes a supply filter for filtering a supply voltage to a power amplifier, a level selection circuitry configured to determine a level of supply voltage based on an instantaneous power of an input data stream, schedule a series of switching events based on the determined level of supply voltage, and generate a level select signal based on the scheduled series of switching events, and a switch for connecting one of supply voltages to the supply filter based on the level select signal. The level selection circuitry schedules a primary switching event of the switch based on the determined level of supply voltage and secondary switching events of the switch delayed with respect to the primary switching event based on the determined level of supply voltage to generate a filter response of the supply filter with smaller peaking.

Digital envelop tracker for power amplifier

A device for digital envelope tracking with dynamically changing voltage levels for a radio frequency (RF) power amplifier is disclosed. A power management unit generates a set of supply voltages for a power amplifier based on a control signal. A setpoint generator in the power management integrated circuit gradually increases or decreases a target voltage such that the set of supply voltages output from the voltage converter gradually increase or decrease in response to a gradual transition of the target voltage. A transceiver includes digital models for replicating a behavior of the setpoint generator and a voltage regulator in the voltage converter such that a signal pre-distortion unit may use an instantaneous voltage level for signal predistortion.

Method and apparatus for digital envelope tracking with dynamically changing voltage levels for power amplifier

A method for charging a battery is provided, wherein current pulses are supplied to the battery, wherein each pulse is followed by a rest period during which no current is supplied to the battery, and wherein the state of charge of the battery is determined during the rest period.

Device and method for charging a battery

Method and system of adjusting a first phase shift between a first data signal and a clock signal at a sending device. First and second test signals representing first and second test data, respectively, are transmitted to a receiving device. The test signals have respective phase shifts relative to the clock signal. An error detection code is calculated from first and second received data carried by the transmitted signals. The error detection code is transmitted from the receiving device to the sending device. An estimated first received data is calculated from the error detection code, wherein the estimated first received data are calculated under the assumption that the second received data are identical to the second test data. The first phase shift is adjusted on the basis of a comparison of the estimated first received data and the first test data.

Phase shift adjusting method and circuit

In an embodiment, the present invention relates to an integrated circuit comprising at least one data signal input (data, data), at least one clock signal input (Clock), at least one control signal input (Cnt_del, Cnt_del) and a data signal output (Data_out). According to the invention, the integrated circuit is configured to provide a digital data signal having a variable symbol duration at its output (Data_out), the symbol duration being controllable by means of the control signal (Cnt_del, Cnt_del). A further embodiment of the invention relates to a method for generating a digital data signal having a variable symbol duration in which an output signal is generated by at least one first data signal, at least one first clock signal and at least one control signal. For this purpose, at least one second clock signal is generated from the first clock signal, the second clock signal having a variable delay and the delay being set depending on the value of the at least one control signal. The output signal is formed from the at least one first data signal, whereby the outputting is carried out edge-synchronously to the first and the second clock signal.

Method and device for generating a digital data signal and use thereof

Methods and apparatus for adjusting a phase difference between clock signals. A first clock signal at a memory controller is adjusted relative to a clock second signal at a memory device. In one embodiment, data is transferred to the memory device according to the first clock signal, which has a predetermined phase relationship with second clock signal. Data received at the memory device is sampled at the memory device according to the second clock signal. Analysis is done of the data on the memory controller and of the received data on the memory circuit. On the basis of the analysis, an adjustment may be made to the phase relationship.

Memory controller, memory circuit and memory system with a memory controller and a memory circuit

A test switching circuit for a high speed data interface is disclosed. Test switching circuit for a high speed data interface of an integrated circuit including switching transistors which switch in a test mode a termination resistor output stage of a data transmission signal path to a termination resistor input stage of a data reception signal path to form an internal feedback test loop within said integrated circuit.

Test switching circuit for a high speed data interface

The invention relates to a VGA stage having a novel circuit configuration for amplifying/attenuating a differential input signal which is transmitted via a transmission line (H). The VGA stage comprises an operational amplifier (OPV, OPV), which is connected as shunt feedback, for amplifying the input signal; a string of resistors (R, R) for attenuating the signal; and a control device () for switching the string of resistors (R, R).

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Dachau, Germany

Otto Schumacher