公开(公告)号：US11502699B1

公开(公告)日：2022-11-15

申请号：US17357467

申请日：2021-06-24

Applicant: NXP B.V.

Inventor： Robert Rutten ,  Hendrik van der Ploeg ,  Lucien Johannes Breems ,  Martin Kessel ,  Muhammed Bolatkale ,  Bernard Burdiek ,  Manfred Zupke ,  Johannes Hubertus Antonius Brekelmans ,  Shagun Bajoria

IPC: H03M3/00

Abstract: 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.

公开(公告)号：US11522557B1

公开(公告)日：2022-12-06

申请号：US17388157

申请日：2021-07-29

Applicant: NXP B.V.

Inventor： Robert Rutten ,  Martin Kessel ,  Hendrik van der Ploeg ,  Lucien Johannes Breems ,  Muhammed Bolatkale ,  Evert-Jan Pol ,  Manfred Zupke ,  Bernard Burdiek ,  Johannes Hubertus Antonius Brekelmans ,  Shagun Bajoria

IPC: H03M3/00

Abstract: 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.

公开(公告)号：US20220200718A1

公开(公告)日：2022-06-23

申请号：US17643096

申请日：2021-12-07

Applicant: NXP B.V.

Inventor： Martin Klein ,  Martin Kessel ,  Sebastian Bohn ,  Manfred Zupke ,  Evert-Jan Pol ,  Hendrik van der Ploeg ,  Andreas Johannes Gerrits ,  Prince Thomas

IPC: H04J3/06

Abstract: A system (100) comprising: a first unit (104) and one or more second units (104). The first unit (102) comprises: a timing reference (114) configured to provide a master-timing-reference-signal; a master time block configured to provide a master-time-signal (117) for the first unit (102) based on the master-timing-reference-signal; and a first interface (122) configured to: receive timestamped-processed-second-RF-signals from the one or more second units (104); and provide a first-unit-timing-signal (262) to the one or more second units (104) based on the master-time-signal. The one or more second units (104) each comprise: a slave time block (141) configured to: determine a slave-time-signal (142) for the second unit (104) 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 (102) and the second-timing-values; and adjust the slave-time-signal based on the adjustment-time.

公开(公告)号：US10541699B1

公开(公告)日：2020-01-21

申请号：US16157355

申请日：2018-10-11

Applicant: NXP B.V.

Inventor： Robert Rutten ,  Massimo Ciacci ,  Manfred Zupke ,  Lucien Johannes Breems ,  Johannes Hubertus Antonius Brekelmans ,  Muhammed Bolatkale ,  Shagun Bajoria ,  Soheil Bahrami

IPC: H03M1/06 ,  H03M3/00 ,  H03M1/00

Abstract: 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.

公开(公告)号：US11616590B2

公开(公告)日：2023-03-28

申请号：US17643096

申请日：2021-12-07

Applicant: NXP B.V.

Inventor： Martin Klein ,  Martin Kessel ,  Sebastian Bohn ,  Manfred Zupke ,  Evert-Jan Pol ,  Hendrik van der Ploeg ,  Andreas Johannes Gerrits ,  Prince Thomas

IPC: H04J3/06 ,  H04W56/00

Abstract: A system (100) comprising: a first unit (104) and one or more second units (104). The first unit (102) comprises: a timing reference (114) configured to provide a master-timing-reference-signal; a master time block configured to provide a master-time-signal (117) for the first unit (102) based on the master-timing-reference-signal; and a first interface (122) configured to: receive timestamped-processed-second-RF-signals from the one or more second units (104); and provide a first-unit-timing-signal (262) to the one or more second units (104) based on the master-time-signal. The one or more second units (104) each comprise: a slave time block (141) configured to: determine a slave-time-signal (142) for the second unit (104) 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 (102) and the second-timing-values; and adjust the slave-time-signal based on the adjustment-time.