公开(公告)号：US20220400973A1

公开(公告)日：2022-12-22

申请号：US17844212

申请日：2022-06-20

Applicant: STICHTING IMEC NEDERLAND

Inventor： Lucas LINDEBOOM ,  Willemijn GROENENDAAL ,  Evelien HERMELING

IPC: A61B5/0537 ,  A61B5/00

Abstract: A method for estimating total body water, TBW, content of a subject, comprises: receiving locally measured bioimpedances for at least two different frequencies of a stimulation current at a body part of the subject; determining a first resistance and a second resistance of the bioimpedance, wherein the first resistance corresponds to a representation of the bioimpedance being purely resistive at a low frequency of the stimulation current and the second resistance corresponds to a representation of the bioimpedance being purely resistive at a high frequency of the stimulation current; and estimating the TBW content of the subject using a ratio between the first resistance and the second resistance.

公开(公告)号：US20220299435A1

公开(公告)日：2022-09-22

申请号：US17694783

申请日：2022-03-15

Applicant: Stichting IMEC Nederland

Inventor： Joris VAN NIEUWSTADT ,  Jan Willem DE WIT

IPC: G01N21/3577 ,  G01N1/14 ,  G01N21/05

Abstract: A device for light-based analysis of a substance in a liquid sample comprises: an analysis cell for holding the liquid sample; wherein the analysis cell comprises a first wall portion for passing light generated by a light source into the analysis cell, and a second wall portion for passing light from the analysis cell to a light detector; and a plunger configured for movement along walls of the analysis cell for allowing entry of the liquid sample into the analysis cell and pushing the liquid sample out of the analysis cell; wherein at least one wiper is arranged on the plunger for cleaning the first and second wall portions during movement of the plunger.

公开(公告)号：US11424747B2

公开(公告)日：2022-08-23

申请号：US17159124

申请日：2021-01-26

Applicant: Stichting IMEC Nederland

Inventor： Johan van den Heuvel ,  Elbert Bechthum

IPC: H03D3/24 ,  H03L7/093 ,  H04L7/033

Abstract: An all-digital phase locked loop (ADPLL) is provided. The ADPLL comprises a pattern generator adapted to generate a frequency control word (FCW) based on a predefined setting and a system clock. In addition, the ADPLL comprises a phase accumulator adapted to translate the FCW into a phase trajectory. The ADPLL further comprises a phase comparator adapted to generate a phase error signal representing a difference between the phase trajectory and the phase of an output oscillation frequency. Moreover, the ADPLL comprises a controller adapted to control a phase of the output oscillation frequency with respect to the phase trajectory.

公开(公告)号：US20220252450A1

公开(公告)日：2022-08-11

申请号：US17613529

申请日：2020-05-19

Applicant: IMEC VZW ,  Stichting IMEC Nederland

Inventor： Chris VAN LIEMPD ,  Andres Felipe VASQUEZ QUINTERO ,  Herbert DE SMET

IPC: G01J1/44 ,  G02F1/133 ,  G02F1/137 ,  G02C7/10 ,  G02C7/04

Abstract: A smart contact lens (400) for detecting a ratiometric change in an incident light (126) intensity is provided, including one or more, preferably concentric, rings (410-1, 410-2, . . . , 410-N) of a liquid crystal display, LCD, type, each ring being operable between a state having a lower attenuation of light and a state having a higher attenuation of light; a circuit (420, 100, 101) for detecting a ratiometric change in an incident light intensity; and a controller (430) configured to operate the one or more rings based on an intensity of an incident light and to, as a response to the circuit (420, 100, 10 101) detecting a ratiometric change in the intensity of the incident light from a higher intensity state to a lower intensity state indicating that at least a beginning of a blinking of an eye of a user has occurred, initiate a re-polarization of the one or more rings. A method of operating the smart contact lens and various uses of the circuit are also provided.

公开(公告)号：US20220176136A1

公开(公告)日：2022-06-09

申请号：US17546616

申请日：2021-12-09

Applicant: IMEC VZW ,  Stichting IMEC Nederland

Inventor： Yao-Hong Liu ,  Barundeb Dutta

IPC: A61N1/372 ,  A61N1/05 ,  A61B5/00

Abstract: The present disclosure relates to a brain-computer interface system and method. In an example, a brain-computer interface system includes a data processing unit, a data transceiver unit, and a sensing or stimulation unit. The system also includes a first communication path between the data transceiver unit and the sensing or stimulation unit including a first downlink channel for transmitting power and data from the data transceiver unit to the data sensing unit and a first uplink channel for transmitting data from the sensing or stimulation unit to the data transceiver unit. The system may additionally include a second communication path between the data processing unit and the data transceiver unit including a second downlink channel for transmitting power and data from the data processing unit to the data transceiver unit and a second uplink channel for transmitting data from the data transceiver unit to the data processing unit.

公开(公告)号：US20220158345A1

公开(公告)日：2022-05-19

申请号：US17369692

申请日：2021-07-07

Applicant: Stichting IMEC Nederland

Inventor： Huib Visser ,  Rainer Oliver Hornung ,  Johannes Frederik Dijkhuis

IPC: H01Q3/26 ,  H03F3/24 ,  H01Q1/50

Abstract: A beam-steering antenna system for improving the angular coverage comprises a transmission line comprising a first end and a second end. The antenna system further comprises a plurality of antenna elements selectively coupled to the transmission line for selectively coupling energy within the transmission line to the plurality of antenna elements. Furthermore, the antenna system comprises a power amplifier coupled to the first end of the transmission line configured to couple-in an input signal into the transmission line during a first operating period. Moreover, the antenna system comprises a delay line coupled to the second end of the transmission line configured to reflect a portion of the input signal into the transmission line, thereby providing a reflection signal during a second operating period.

公开(公告)号：US20220077603A1

公开(公告)日：2022-03-10

申请号：US17466908

申请日：2021-09-03

Applicant: IMEC VZW ,  Stichting IMEC Nederland

Inventor： Peter Offermans ,  Davide Guermandi ,  Ashwyn Srinivasan

IPC: H01Q23/00 ,  H01Q9/28

Abstract: A circuit for optoelectronic down-conversion of a terahertz, THz, signal comprises a first photodiode and a second photodiode configured to be excited by an optical beat signal. The photodiodes are coupled in series through a common antenna. The terminals of the antenna are coupled to form an output terminal and the antenna is configured to receive the terahertz, THz, signal. The photodiodes thereby, via the optical beat signal, respectively, down-convert the THz signal and generate a current comprising an intermediate frequency, IF, component and a direct current, DC, component. The respective generated currents are summed at the output terminal, thereby obtaining the IF components and cancelling the DC components.

公开(公告)号：US20220000378A1

公开(公告)日：2022-01-06

申请号：US17368648

申请日：2021-07-06

Applicant: Stichting IMEC Nederland

Inventor： Fabian BEUTEL ,  Evelien HERMELING

IPC: A61B5/021 ,  A61B8/06 ,  A61B5/0285 ,  A61B5/352 ,  A61B8/04 ,  A61B8/02 ,  A61B8/08 ,  G16H50/30 ,  G16H10/60 ,  G16H40/67

Abstract: A method for estimating a measure of cardiovascular health of a subject (102) comprises: receiving (302) an electrocardiogram, ECG, signal (202); receiving (304) an artery signal (210) representative of pressure pulse wave propagation at a location in an artery; determining (306) a fiducial point in time based on the ECG signal (202) providing an indication of onset of isovolumetric contraction; determining (308) a pre-systolic pressure pulse arrival point in time (212) based on the artery signal (210) to correspond to the onset of the isovolumetric contraction being reflected in the artery signal (210), determining (310) a time period between the onset of the isovolumetric contraction and the pre-systolic pressure pulse arrival point in time, said time period representing a vascular transit time; and determining (312) a pulse wave velocity of the subject (102) based on a physical distance between an aortic valve and the location in the artery and on the vascular transit time.

公开(公告)号：US10966663B2

公开(公告)日：2021-04-06

申请号：US16023352

申请日：2018-06-29

Applicant: STICHTING IMEC NEDERLAND

Inventor： Ilde Rosa Lorato

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/05 ,  A61B5/08 ,  G01S7/35 ,  G01S13/50 ,  A61B5/113

Abstract: A method for detecting a vital sign of a subject (102) comprises: receiving (302) a reflected radio frequency signal from the subject (102), the reflected signal being based on a transmitted signal, which is Doppler-shifted due to mechanical movements corresponding to the heart rate and/or the respiratory rate; dividing (304) a baseband signal into a sequence of sliding windows (200), each sliding window (200) representing a time interval; estimating (306) a vital sign parameter in at least one sliding window (200); determining (308) whether a vital sign parameter may be reliably estimated in at least one sliding window (200); on condition that the vital sign parameter may not be reliably estimated in a sliding window (200), determining (310) a vital sign parameter of the sliding window (200) based on vital sign parameters estimated in a plurality of windows representing time intervals close to the time interval of the window (200).

公开(公告)号：US10862489B2

公开(公告)日：2020-12-08

申请号：US16670394

申请日：2019-10-31

Applicant: Stichting IMEC Nederland

Inventor： Johan van den Heuvel ,  Paul Mateman

IPC: H03L7/099 ,  H03L7/093 ,  H03B5/12 ,  H03C3/09 ,  H03L1/00

Abstract: A signal generator comprises (i) a first set of capacitors at least partially switchably connectable for adjusting a frequency of an oscillator as part of a phase-locked loop and (ii) a second set of capacitors comprised in one or more oscillator control subsystems. A method of controlling the signal generator comprises: (i) acquiring a frequency lock in the phase-locked loop, (ii) calculating, in conjunction with the acquiring of the frequency lock, a systematic capacitance error of the first set of capacitors due to process, voltage, and temperature variations based on the frequency of the oscillator and a switching state of the first set of capacitors, and (iii) calibrating the one or more oscillator control subsystems using the systematic capacitance error, thereby compensating for process, voltage, and temperature variations common between the first set of capacitors and the second set of capacitors.