Nxp B.v.

Martin Kessel

Sebastian Bohn

Hendrik Van Der Ploeg

Manfred Zupke

Lucien Johannes Breems

Johannes Hubertus Antonius Brekelmans

Muhammed Bolatkale

Robert Rutten

Shagun Bajoria

Evert-Jan Pol

Bernard Burdiek

Prince Thomas

Andreas Johannes Gerrits

Marco Berkhout

Massimo Ciacci

Fred Mostert

Mattheus Johan Koerts

Matthias Schattka

Jörg Andreas Siemes

Sebastian Eckert

Martin Klein

A system includes a first integrated circuit device, a second integrated circuit device, and a reference clock provided to the first and second integrated circuit devices. The first integrated circuit device detects a first edge of a first clock utilized by the first integrated circuit device, detects a second edge of the first clock, determines a first count of cycles of the reference clock between the first edge and the second edge, and communicates the first count to the second integrated circuit device. The second integrated circuit device receives the first count, provides a third edge of a second clock utilized by the second integrated circuit device, determines that a first number of cycles of the reference clock since providing the third edge is equal to the first count, and provides a fourth edge of the second clock in response to determining that the first number of cycles is equal to the first count.

Low phase noise clock recovery over a data connection

A system () comprising: a first unit () and one or more second units (). The first unit () comprises: a timing reference () configured to provide a master-timing-reference-signal; a master time block configured to provide a master-time-signal () for the first unit () based on the master-timing-reference-signal; and a first interface () configured to: receive timestamped-processed-second-RF-signals from the one or more second units (); and provide a first-unit-timing-signal () to the one or more second units () based on the master-time-signal. The one or more second units () each comprise: a slave time block () configured to: determine a slave-time-signal () for the second unit () based on the master-timing-reference-signal; determine one or more second-timing-values based on the slave-time-signal; determine an adjustment-time based on the first-unit-timing-signal received from the first unit () and the second-timing-values; and adjust the slave-time-signal based on the adjustment-time.

System comprising multiple units

A digital conversion system including a sigma-delta converter, a tone generator that generates injects a tone signal into the conversion path of the sigma-delta converter at a frequency that is outside operating signal frequency range, a tone detector that isolates and detects a level of the injected tone signal and provides a corresponding tone level value, a tone ratio comparator that converts the tone level value into a tone level ratio and that compares the converted tone level ratio with an expected tone level ratio to provide an error signal, and a loop controller that converts the error signal to a correction signal to adjust a loop filter frequency the sigma-delta converter. Tones may be serially injected one at a time or simultaneously in parallel for determining a measured tone level ratio for comparison with a corresponding one of multiple stored expected tone level ratios.

System and method of calibration of sigma-delta converter using tone injection

A digital conversion system including a sigma-delta converter, a signal generator providing a substantially symmetrical injection signal that is injected into the sigma-delta converter conversion path, bandpass filters for filtering the injection signal and the output of the sigma-delta converter, a correlator that correlates the filtered signals for providing an error signal, and a loop controller that uses the error signal to adjust a resonant frequency of the sigma-delta converter to output a target notch frequency. The loop controller may adjust a resonant frequency of a loop filter of the sigma-delta converter, in which the bandpass filters may each be centered at the target notch frequency at the output of the sigma-delta converter. The correlator may include a complex conjugate block, a multiplier and a mean calculator. The loop controller may include a converter and an amplifier and an integrator or a least-mean square block.

System and method of calibration of sigma-delta converter using injected signal correlation

An interrupt rate limiter limits the rate of interrupt signals being transmitted from a first node to a second node of a computer system. In certain implementations, a first logic block compares an accumulator value to a threshold value to determine whether to (i) block an interrupt signal received from the first node from reaching the second node or (ii) allow the interrupt signal to reach the second node, an accumulator register stores the accumulator value, which is (i) increased whenever the first logic block allows an interrupt signal to reach the second node and (ii) otherwise periodically decreased, a summation node receives the accumulator value and one or more values that determine whether the accumulator value is to be increased or decreased, and a second logic block determines whether to increase or decrease the accumulator value based on whether an interrupt signal has been transmitted to the second processor.

Interrupt rate limiter

Aspects of the disclosure are directed to processing signals including data exhibiting characteristics that facilitate assessment of transmission errors. As may be implemented in accordance with one or more embodiments, parameters are generated based signal transmission characteristics and are indicative of a different types of signal characteristics, including an amount of error correction that has been carried out on the signal. Two or more of the parameters are selected based on properties of signal disturbance under different reception conditions for the signal, and a degree of disturbance in the signal is predicted based on the selected parameters and signal conditions for the respective parameters at which the signal cannot be corrected. An output generated with the signal is then controlled, based on the predicted degree of disturbance and a threshold degree of disturbance.

Error estimation in signal communications

A receiver node for use in a digital broadcast system, comprising a receiver configured to receive a signal containing a service encoded with an error correcting code for decoding and wherein said receiver is further configured to ignore the signal during an ignore period, the node configured to use said error correcting code and the encoded service received outside the ignore period to reconstruct the part of the service ignored by the receiver.

Receiver

Aspects are directed to an amplifier circuit including a signal processing circuit and a calibration circuit. In certain specific embodiments, the signal processing circuit includes a signal combiner and a closed-loop feedback path, and the signal processing circuit is designed to provide a loop transfer function for a derived signal partly representing contributions from an audio input signal, a control or pilot signal having a target frequency range, and a calibration signal. The signal combiner is designed to combine aspects of the control or pilot signal and aspects of the audio input signal, and the calibration circuit is designed to adjust an effective gain of the derived signal in response to whether a unity-gain frequency of a signal in the closed-loop feedback path, as provided via the loop transfer function, is higher or lower than the target frequency range. Consistent therewith and in yet more specific embodiments, such an amplifier circuit can define the target frequency range relative to the transfer function and an associated unity-gain frequency.

Automatic loop gain calibration in amplification circuits

An apparatus and method are provided. A first buffer is configured to store a first packet stream, the first buffer comprising a first read pointer pointing to a first position in the first packet stream. A second buffer is configured to store a second packet stream. The second packet stream corresponds to the first packet stream and the second buffer comprises a second read pointer. A controller is configured to determine a second position in the second packet stream that corresponds to the first position in the first packet stream and adjust the second read pointer to point to the second position.

Audio data processing

A method of managing wirelessly transmitted use-data in a wireless data transmission environment, the method comprising: Receiving the wirelessly transmitted use-data by a first receiver and estimating a reception quality of the use-data received by the first receiver by applying a quality criterion. In case the reception quality meets the quality criterion, the method moreover comprises using a second receiver for background scanning the wireless data transmission environment, and in case the reception quality does not meet the quality criterion, the method moreover comprises using the second receiver additionally for reception of the use-data, thus providing both receivers for a diversity reception of the use-data.

Managing wirelessly transmitted use-data in a wireless data transmission environment

A gain control apparatus for an amplifier is disclosed. The gain control apparatus configured to provide an amplifier gain control signal for setting the gain applied by the amplifier to an amplifier signal comprising an amplifier input signal amplified by the amplifier to generate an amplifier output signal. The apparatus includes a plurality of gain determination elements comprising and a gain controller configured to generate the amplifier gain control signal based on at least the first and second gain control signals.

Gain control apparatus

A receiver controller configured to control a receiver in receipt a signal comprising a series of time-consecutive symbols is disclosed. Each symbol includes an FFT window and a guard interval and the guard interval includes a cyclic prefix or postfix. The receiver controller is configured to control the receiver to acquire at least one signal parameter. The receiver controller is also configured to, based on a plurality of samples of the received signal, each sample having a predetermined sample length, determination of a plurality of correlation values based on pairs of the plurality of samples, said pairs of samples separated in time by a predetermined separation number of samples.

Receiver controller

A receiver component and a method for enhancing a detection range of a time synchronization process in a receiver utilize multiple cross-correlations of a received signal with a known preamble sequence. The results of the multiple cross-correlations are divided into delay segments. The delay segments of one of the multiple cross-correlations are compared with the delay segments of another of the multiple cross-correlations to determine delay of the delay segments of the one of the multiple cross-correlation results.

Growing community of inventors

Dresden, Germany

Martin Kessel