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1. 发明申请

US20220170968A1 CIRCUIT AND METHOD FOR DETERMINING THE RATIO BETWEEN TWO FREQUENCIES 有权
公开(公告)号：US20220170968A1
公开(公告)日：2022-06-02
申请号：US17434641
申请日：2020-02-24
申请人： SEMIBLOCKS B.V.
发明人： Michiel VAN ELZAKKER , Rob VAN DER VALK , Kees VAN NIEUWBURG
IPC分类号： G01R23/02 , G01K7/32
摘要： Determining the ratio between two frequencies can be a useful electronic building block in different electronic circuits with very divers functionalities. The invention comprises a circuit for determining a frequency ratio between a first input signal having a first frequency and a second input signal having a second frequency, wherein the circuit comprises: a controlled fractional frequency divider arranged for generating a divided signal having a divided frequency being substantially the first frequency divided by a control signal; a frequency phase detector arranged for generating a phase difference signal based on a frequency phase difference between the divided frequency of the divided signal and the second frequency of the second input signal; and a loop filter arranged for generating the control signal based on the phase difference signal; wherein a loop is formed by the controlled fractional frequency divider, the divided signal, the frequency phase detector, the phase difference signal, the loop filter and the control signal; wherein the loop filter filters the phase difference signal such that instability of the loop is prevented; and wherein the control signal, preferably the magnitude of the control signal, is indicative of the frequency ratio.

2. 发明授权

US11296653B2 Microcontroller comprising oscillators that are configured to receive external resonator signals 有权
公开(公告)号：US11296653B2
公开(公告)日：2022-04-05
申请号：US17161855
申请日：2021-01-29
申请人： STMicroelectronics (Rousset) SAS
发明人： Arnaud Gamet , Philippe Le Fevre
IPC分类号： H03B5/36 , H03B5/14 , H03B5/32 , H03L1/02 , G01K7/32
摘要： A shared pair of input/output cells configured to be able to be connected to a first external resonator or a second external resonator. A first oscillator and a second oscillator are coupled to the shared pair input/output cells by a switching circuit. The switching circuit is configured to be able to connect either the first oscillator or the second oscillator to the pair of input/output cells.

3. 发明授权

US11193964B2 System and method for measuring changes in dielectric properties in a structure 有权
公开(公告)号：US11193964B2
公开(公告)日：2021-12-07
申请号：US16431370
申请日：2019-06-04
申请人： Purdue Research Foundation
发明人： Abhijeet Dhiman , Vikas Tomar , Animesh Sharma , Alexey Shashurin , Sergey O Macheret
IPC分类号： G01R27/26 , G01L1/10 , G01K11/26 , G01L1/12 , G01K1/024 , G01K7/32
摘要： A method of determining stress within a composite structure is provided which includes coupling a sensor to a composite structure under load having embedded therein a plurality of particles, wherein the particles at room temperature are paraelectric or ferroelectric, transmitting an electromagnetic radiation to the sensor, thereby generating an electromagnetic field into the composite structure, sweeping frequency from a first frequency to a second frequency in a pulsed manner, receiving reflected power from the composite structure, determining the resonance frequency of the sensor, and translating the resonance frequency of the sensor to stress within the composite structure.

4. 发明授权

US11114968B2 Rotating electric machine device and rotating electric machine device control method 有权
公开(公告)号：US11114968B2
公开(公告)日：2021-09-07
申请号：US16753675
申请日：2017-11-24
申请人： Mitsubishi Electric Corporation
发明人： Yoshihiro Miyama , Hideaki Arita , Junji Hori , Tomohira Takahashi , Kenzo Makino , Masaya Inoue
IPC分类号： H02P27/06 , G01K1/024 , G01K7/32 , H02P29/024
摘要： A rotating electric machine apparatus including: a rotating electric machine (REM) including a rotor and a stator; an inverter device including an inverter circuit (IC) for driving the REM and an inverter control unit (ICU) for controlling the IC; a detector, in which a first antenna is connected to a resonance circuitry, which is mounted to the REM and has a resonance characteristic that changes depending on a change in a physical quantity; and a detection processor receiving a response radio wave indicating a detection result of the change in the physical quantity from the first antenna while transmitting a transmission radio wave at a set carrier frequency from a second antenna, and comparing the detection result and the set value, to thereby obtain an abnormal state in the REM. The ICU controls output of the IC in accordance with an abnormal state signal from the detection processor.

5. 发明授权

US11070192B2 Torsional mode quartz crystal device 有权
公开(公告)号：US11070192B2
公开(公告)日：2021-07-20
申请号：US16999579
申请日：2020-08-21
申请人： Statek Corporation
发明人： Yue Fang , Jian Feng Chen
IPC分类号： H03H9/215 , H03H9/05 , H03H9/13 , H03H9/02 , G01K7/32 , H03H9/10
摘要： The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal, wherein each of the tines has formed on one or both of opposing sides thereof a pair of vertically recessed groove structures laterally elongated in the horizontal lengthwise direction, wherein the pair of groove structures are separated in a horizontal widthwise direction by a line structure. The quartz crystal device further comprises a first electrode and a second electrode formed on the one or both of the opposing sides of each of the tines and configured such that, when an electrical bias is applied between the first and second electrodes, the fork-shaped quartz crystal vibrates in a torsional mode in which each of the tines twists about a respective axis extending in the horizontal lengthwise direction.

6. 发明授权

US11067455B2 Real-time temperature measurement for electrical conductors 有权
公开(公告)号：US11067455B2
公开(公告)日：2021-07-20
申请号：US16064745
申请日：2015-12-21
申请人： 3M INNOVATIVE PROPERTIES COMPANY
发明人： Sihua Yuan , Justin M. Johnson , Ryan D. Erickson , Christopher D. Sebesta , Zheng Huang , Jia Hu , Tongyong Li , Gaofei Guo , Tao Yang , Qihong Nie
IPC分类号： G01K7/34 , G01K1/143 , G01K1/16 , H01R4/48 , G01K7/24 , G01K7/32
摘要： A temperature-sensing apparatus for sensing the temperature of an electrical conductor (31), comprising a sensor frame (210) including a frame body (2101) and a channel (2102) adapted to accommodate the electrical conductor (31). At least a portion of a temperature sensor is received in a chamber (2103) of the sensor frame (210). At least a portion of a thermal contact member is disposed between the electrical conductor (31) and the temperature sensor and configured to enhance thermal-contact therebetween. At least a portion of the thermal contact member is radially pressable against the electrical conductor (31).

7. 发明授权

US10992300B2 Oscillator, electronic apparatus, and vehicle 有权
公开(公告)号：US10992300B2
公开(公告)日：2021-04-27
申请号：US16829795
申请日：2020-03-25
申请人： SEIKO EPSON CORPORATION
发明人： Kentaro Seo
IPC分类号： H03B5/32 , H03L1/02 , H03L1/04 , G01K7/32
摘要： An oscillator includes a resonator, a temperature control element that controls a temperature of the resonator, a first temperature sensing element that outputs a first temperature detection signal, a second temperature sensing element that is provided at a position farther from the resonator than the first temperature sensing element and outputs a second temperature detection signal, an analog/digital conversion circuit that converts the first temperature detection signal into a first temperature code which is a digital signal, and converts the second temperature detection signal into a second temperature code which is a digital signal, and a digital signal processing circuit that generates a temperature control code for controlling the temperature control element based on the first temperature code and the second temperature code.

8. 发明申请

US20200295694A1 ROTATING ELECTRIC MACHINE DEVICE AND ROTATING ELECTRIC MACHINE DEVICE CONTROL METHOD 审中-公开
公开(公告)号：US20200295694A1
公开(公告)日：2020-09-17
申请号：US16753675
申请日：2017-11-24
申请人： Mitsubishi Electric Corporation
发明人： Yoshihiro MIYAMA , Hideaki ARITA , Junji HORI , Tomohira TAKAHASHI , Kenzo MAKINO , Masaya INOUE
IPC分类号： H02P27/06 , H02P29/024 , G01K7/32 , G01K1/02
摘要： A rotating electric machine apparatus including: a rotating electric machine (REM) including a rotor and a stator; an inverter device including an inverter circuit (IC) for driving the REM and an inverter control unit (ICU) for controlling the IC; a detector, in which a first antenna is connected to a resonance circuitry, which is mounted to the REM and has a resonance characteristic that changes depending on a change in a physical quantity; and a detection processor receiving a response radio wave indicating a detection result of the change in the physical quantity from the first antenna while transmitting a transmission radio wave at a set carrier frequency from a second antenna, and comparing the detection result and the set value, to thereby obtain an abnormal state in the REM. The ICU controls output of the IC in accordance with an abnormal state signal from the detection processor.

9. 发明授权

US10436650B2 Nanometer scale quantum thermometer 有权
公开(公告)号：US10436650B2
公开(公告)日：2019-10-08
申请号：US14781382
申请日：2014-04-01
申请人： President and Fellows of Harvard College
发明人： Peter Christian Maurer , Hyun Ji Noh , Georg Kucsko , Mikhail D. Lukin , Hongkun Park , Minako Kubo
IPC分类号： G01K11/20 , G01K7/32 , G01K13/00
摘要： An approach to nanoscale thermometry that utilizes coherent manipulation of the electronic spin associated with nitrogen-vacancy (NV) color centers in diamond is disclosed. The methods and apparatus allow for detection of temperature variations down to milli-Kelvin resolution, at nanometer length scales. This biologically compatible approach to thermometry offers superior temperature sensitivity and reproducibility with a reduced measurement time. The disclosed apparatus can be used to study heat-generating intracellular processes.

10. 发明授权

US10401233B2 Magneto-mechanical resonator sensor with absorption material 有权
公开(公告)号：US10401233B2
公开(公告)日：2019-09-03
申请号：US15504428
申请日：2015-08-25
申请人： 3M INNOVATIVE PROPERTIES COMPANY
发明人： David P. Erickson , Chaodi Li , Cheryl Lee Senger Elsbernd , Jia Hu , Andrew P. Bonifas , Orlin B. Knudson , Richard L. Rylander
IPC分类号： G01K7/32 , G01N19/10 , G01N29/14 , G01N29/24 , G01N29/46 , G01R33/00 , G01R33/028 , A61L2/28 , G01K7/36 , G01K11/00
摘要： Some aspects of the present disclosure feature a sensing device comprising a magnetic bias layer, a resonator, a spacer, and a housing. The spacer includes an environmental change receptor. The thickness of the environmental change receptor rapidly increases in response to a change to an environment variable.

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