Method and system for measuring speed and distance of a bicycle

    公开(公告)号:US11976941B2

    公开(公告)日:2024-05-07

    申请号:US17442390

    申请日:2020-03-09

    CPC classification number: G01C22/002 G01P3/487

    Abstract: A method and system for measuring a physical parameter, such as speed and/or distance travelled by a bicycle, includes a permanent magnet disposed on a front fork and a measuring circuit with a magnetic sensor disposed on a rim of the wheel at the same distance from the wheel axis of rotation as the magnet. The sensor passes in front of the magnet to generate an induced voltage pulse at each passage. The induced voltage is rectified and stored on a capacitor. Energy recovery during the sensor passing in front of the magnet allows powering of the measuring circuit. The parameter is calculated in the calculation unit clocked by an oscillator based on the received induced voltage pulses by knowing the bicycle wheel diameter. Measurements performed from the measuring circuit are transmitted to a portable device carried by the user or mounted on the bicycle to be displayed.

    Synchronous demodulator electronic circuit for phase modulation signals
    3.
    发明授权
    Synchronous demodulator electronic circuit for phase modulation signals 有权
    用于相位调制信号的同步解调器电子电路

    公开(公告)号:US09553748B2

    公开(公告)日:2017-01-24

    申请号:US14645917

    申请日:2015-03-12

    Abstract: The synchronous demodulator electronic circuit for phase modulation signals includes, in a control loop, a discrete Fourier transform unit for receiving the phase modulation signal to be demodulated, and means of recovering the carrier frequency of the phase modulation signal, so that the discrete Fourier transform unit performs in combination the operations of mixing and low-pass filtering the sampled phase modulation signal with at least one frequency and phase adapted digital conversion signal to supply at least one demodulated signal at the output of the discrete Fourier transform unit.

    Abstract translation: 用于相位调制信号的同步解调器电子电路在控制环路中包括用于接收要解调的相位调制信号的离散付里叶变换单元和恢复相位调制信号的载波频率的装置,使得离散傅里叶变换 单元将采样相位调制信号的混合和低通滤波操作与至少一个频率和相位适配数字转换信号进行组合,以在离散付里叶变换单元的输出处提供至少一个解调信号。

    Transmitter-receiver comprising an electronic chip

    公开(公告)号:US10742332B2

    公开(公告)日:2020-08-11

    申请号:US16658224

    申请日:2019-10-21

    Abstract: A transmitter-receiver includes an electronic chip a mixer for mixing the frequency of a received radio frequency signal with that of an oscillating signal supplied by a first frequency synthesizer in, a switch having two inputs connected to an output of the mixer and to an auxiliary input terminal, a filter and gain stage connected to the output of the switch, and a modulator-demodulator connected to the output of the filter and gain stage. The first frequency synthesizer is connected between the output of the modulator-demodulator and radio frequency input and output terminal, and configured to supply a frequency-modulated signal to the radio frequency input and output terminal. The electronic chip further includes a second frequency synthesizer connected between the output of the modulator-demodulator and an auxiliary output terminal, and configured to synthesize a modulated low-frequency signal supplied by the auxiliary output terminal, whereby the center value of the low frequency is equal to the value of the intermediate frequency.

    Beacon localization method
    5.
    发明授权

    公开(公告)号:US10006980B2

    公开(公告)日:2018-06-26

    申请号:US15296570

    申请日:2016-10-18

    Abstract: The method for localizing a beacon consists in transmitting, by a first transceiver, an initiation signal, which is received by second and third transceivers, in calculating, by means of said initiation signal, errors between a reference frequency of the first transceiver and reference frequencies of the second and third transceivers, in transmitting, by the beacon, a first pulsed signal, which is received by the first, second and third transceivers, in transmitting, by the first transceiver, a second pulsed signal, which is received by the second and third transceivers, in calculating differences in the times-of-flight of the first and second pulsed signals, each time-of-flight difference being calculated in a time base provided by a local oscillator of the first transceiver by means of reference frequency errors, and in calculating a beacon position by means of the times-of-flight.

    Electronic circuit with self-calibrated PTAT current reference and method for actuating the same
    6.
    发明授权
    Electronic circuit with self-calibrated PTAT current reference and method for actuating the same 有权
    具有自校准PTAT电流参考的电子电路及其驱动方法

    公开(公告)号:US09442509B2

    公开(公告)日:2016-09-13

    申请号:US14558839

    申请日:2014-12-03

    CPC classification number: G05F3/262 G05F3/242

    Abstract: The electronic circuit with a self-calibrated PTAT current reference includes a PTAT current generator dependent on at least one integrated resistor for supplying a PTAT output current. It further includes a reference current generator dependent on at least one switched capacitor resistor, for supplying a reference current. The reference current and the PTAT output current are compared in a comparator so as to digitally adapt the programmable integrated resistor, or to digitally adapt the dimensional ratio of the transistors of a current mirror in the PTAT current generator, to supply the adapted PTAT output current.

    Abstract translation: 具有自校准PTAT电流参考的电子电路包括取决于至少一个用于提供PTAT输出电流的集成电阻器的PTAT电流发生器。 它还包括一个参考电流发生器,它取决于至少一个开关电容电阻器,用于提供参考电流。 参考电流和PTAT输出电流在比较器中进行比较,以便对可编程集成电阻进行数字调适,或数字调整PTAT电流发生器中的电流镜的晶体管的尺寸比,以提供适配的PTAT输出电流 。

    Signal receiver with a duty-cycle controller
    7.
    发明授权
    Signal receiver with a duty-cycle controller 有权
    带有占空比控制器的信号接收器

    公开(公告)号:US09419660B2

    公开(公告)日:2016-08-16

    申请号:US14530296

    申请日:2014-10-31

    Abstract: The signal receiver has means to suppress at least one higher harmonic component from a MEMS or crystal oscillator having a reference resonator in filtered intermediate signals of a signal receiver. The signal receiver comprises an antenna for receiving electromagnetic signals, a low noise amplifier for amplifying signals received by the antenna, one MEMS or crystal oscillator comprising a reference resonator to generate an oscillating signal with a predefined duty-cycle, a mixer for mixing the amplified and received signals with the oscillating signal to generate intermediate signals, a band-pass filter to filter the intermediate signals, and a duty-cycle controller coupled to the MEMS or crystal oscillator and coupled to the output of the band-pass filter to analyze the spectrum of the filtered intermediate signals and to modify the duty-cycle of the oscillating signal in response to the spectrum analysis of the filtered intermediate signals.

    Abstract translation: 信号接收机具有在信号接收机的经滤波的中间信号中抑制来自具有参考谐振器的MEMS或晶体振荡器的至少一个高次谐波分量的装置。 信号接收机包括用于接收电磁信号的天线,用于放大由天线接收的信号的低噪声放大器,包括参考谐振器的一个MEMS或晶体振荡器,以产生具有预定占空比的振荡信号;混频器,用于混合放大 并且用振荡信号接收信号以产生中间信号,滤波中间信号的带通滤波器和耦合到MEMS或晶体振荡器并耦合到带通滤波器的输出的占空比控制器,以分析 频谱,并响应于滤波的中间信号的频谱分析来修改振荡信号的占空比。

    Crystal oscillator and startup method for a crystal oscillator

    公开(公告)号:US11251750B1

    公开(公告)日:2022-02-15

    申请号:US17326434

    申请日:2021-05-21

    Abstract: A crystal oscillator and a startup method for initiating operation of a crystal oscillator, the crystal oscillator includes an oscillator structure including a crystal resonator and an electronic oscillator circuit connected to the crystal resonator, the oscillator structure having a first terminal and a second terminal, a startup controller operable to initiate an oscillation in the oscillator structure by exciting the oscillator structure with a sequence of excitation signals derivable from a clock signal and when triggered by a timing signal, the sequence of excitation signals includes at least a first excitation signal and a second excitation signal, a comparator including a first and a second input terminal and an output terminal, the first input terminal being connected to the first terminal and wherein the second input terminal is connected to the second terminal.

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