Nxp B.v.

Koninklijke Philips Corporation N.v.

St-ericsson Sa

Manfred Zupke

Lucien Johannes Breems

Johannes Hubertus Antonius Brekelmans

Muhammed Bolatkale

Robert Rutten

Martin Kessel

Shagun Bajoria

Hendrik Van Der Ploeg

Evert-Jan Pol

Bernard Burdiek

Hans-Jürgen Kühn

Massimo Ciacci

Sebastian Bohn

Prince Thomas

Andreas Johannes Gerrits

Martin Klein

Soheil Bahrami

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

Aspects of the disclosure are directed to compensating for errors in in an analog-to-digital converter circuit (ADC). As may be implemented in accordance with one or more embodiments, an apparatus and/or method involves an ADC that converts an analog signal into a digital signal using an output from a digital-to-analog converter circuit (DAC). A compensation circuit generates a compensation output by, for respective signal portions provided to the DAC, generating a feedback signal based on an incompatibility between the conversion of the signal portions into an analog signal and the value of the signal portions provided to the DAC. A compensation output is generated based on the signal input to the DAC with a gain applied thereto, based on the feedback signal.

Signal processing and conversion

Disclosed is an AGC detector device and an AGC detecting method for television receivers displaying video pictures consisting of a plurality of horizontal lines to be built up successively, wherein a CVBS signal is inputted which includes horizontal sync pulses having a front porch region and a back porch region and occurring once a horizontal line during a horizontal sync period when generating a current video picture, and further includes vertical sync pulses occurring during a vertical sync period before the generation of a new video picture and including serration pulses which occur during a serration pulse region being part of the vertical sync period. Further, gating pulses are generated having a period which is equal to the line period of the horizontal sync pulses. Said gating pulses are adjusted such that they occur at the back porch region of the horizontal sync pulses. The particularity of the invention is that the occurrence of the gating pulses is shifted during the serration pulse region of the vertical sync period so that the gating pulses occur earlier by a time interval corresponding to the time distance between a front porch region and the next back porch region or later by a time interval corresponding to the time distance between a back porch region and the next front porch region.

AGC detector and method for AGC detecting

The invention relates to a digital phase locked loop (PLL)for demodulating an intermediate frequency signal. The digital phase locked loopcomprises two coordinate rotation digital computersandin its phase detector. The robustness the PLLcan be improved by means of a gain control circuit, a sign detector, a carrier monitoring circuitand an adjustable loop filter

Digital phase locked loop

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Hamburg, Germany

Manfred Zupke