公开(公告)号：US10520311B2

公开(公告)日：2019-12-31

申请号：US15600504

申请日：2017-05-19

申请人： DENSO CORPORATION

发明人： Takamoto Watanabe ,  Shigenori Yamauchi

IPC分类号： G01C19/56 ,  G01C19/06 ,  G01C19/5719 ,  G01C19/5776 ,  H03K5/00

摘要： A gyro sensor apparatus includes a driving section that supplies a driving signal, which is for vibrating a sensing element of a vibration-type gyro sensor in a drive axis direction, to the sensing element, and a processing unit that receives a first vibration signal having an amplitude proportional to a driving vibration amplitude, which is an amplitude of vibration in the drive axis direction of the sensing element and a second vibration signal having an amplitude proportional to Coriolis force generated in the sensing element due to an angular velocity of the sensing element. The processing unit is configured to calculate a ratio of Coriolis force to the driving vibration amplitude based on the first vibration signal and the second vibration signal and output a result of the calculation as a result of detection of the angular velocity of the sensing element.

公开(公告)号：US09553751B2

公开(公告)日：2017-01-24

申请号：US15150461

申请日：2016-05-10

申请人： DENSO CORPORATION

发明人： Takamoto Watanabe ,  Shigenori Yamauchi

IPC分类号： H04B1/16 ,  H04L27/14 ,  H04L27/22 ,  H04L27/26 ,  H04B1/00

CPC分类号： H04L27/2649 ,  G01C19/5614 ,  H03M1/50 ,  H04B1/16 ,  H04L27/06 ,  H04L27/14 ,  H04L27/22

摘要： A demodulation device for demodulating a base signal from a composite signal, which is composed of a carrier wave and a sensor modulation signal of the base signal. The demodulation device determines a difference between the composite signal of a former-half period and the composite signal of a latter-half period to be a pre-correction base signal. The former-half period is a one-half period of a sampling period starting at one of a local maximum and a local minimum of the carrier wave. The latter-half period follows the former-half period. The demodulation device determines a reference level from the composite signal and determines a signal level of a post-correction base signal based on a ratio between a signal level of the pre-correction base signal and the reference level.

摘要翻译： 一种解调装置，用于从由载波和基本信号的传感器调制信号组成的复合信号中解调基本信号。 解调装置确定前半周期的复合信号与后半周期的复合信号之间的差作为预校正基准信号。 前半周期是从载波的局部最大值和局部最小值之一开始的采样周期的一半周期。 后半期是前半期。 解调装置根据复合信号确定参考电平，并根据校正前基准信号的信号电平与参考电平之间的比率确定校正后基准信号的信号电平。

公开(公告)号：US09645122B2

公开(公告)日：2017-05-09

申请号：US14288436

申请日：2014-05-28

申请人： DENSO CORPORATION

发明人： Shigenori Yamauchi ,  Takamoto Watanabe ,  Tomohito Terazawa

IPC分类号： H03B5/30 ,  G01N29/34 ,  G01P21/00 ,  B06B1/02

CPC分类号： G01N29/34 ,  B06B1/0261 ,  B06B1/0292 ,  G01N29/343 ,  G01P21/00 ,  H03B5/30

摘要： A gyro sensor includes a vibrator and a drive circuit. A PWM drive signal is applied to a pair of electrodes of the vibrator. The drive circuit outputs a high level signal and a low level signal to the electrodes as the PWM drive signal. The high level signal and the low level signal have potentials higher and lower than that of the reference signal, respectively. The drive circuit outputs the high level signal to one of the pair of electrodes and the low level signal to the other of the pair of electrodes.

公开(公告)号：US09614513B2

公开(公告)日：2017-04-04

申请号：US14288464

申请日：2014-05-28

申请人： DENSO CORPORATION

发明人： Shigenori Yamauchi ,  Takamoto Watanabe ,  Nobuyuki Taguchi

IPC分类号： H03K7/08 ,  G01C19/5726

CPC分类号： H03K7/08 ,  G01C19/5726

摘要： In a gyro sensor, a TDC detects a magnitude of vibration of a vibrator. A drive circuit (excluding the TDC) determines a duty ratio of a PWM drive signal in accordance with the magnitude of vibration so that the magnitude of vibration becomes a predetermined magnitude and outputs the PWM drive signal having the determined duty ratio. The drive circuit (excluding the TDC) includes a control circuit and a DCO. The control circuit measures time corresponding to the control value by using a gate delay time, generates the PWM drive signal having a pulse width corresponding to the control value and outputs the PWM drive signal.

公开(公告)号：US09964928B2

公开(公告)日：2018-05-08

申请号：US14817271

申请日：2015-08-04

申请人： DENSO CORPORATION

发明人： Shigenori Yamauchi ,  Takamoto Watanabe ,  Nobuyuki Taguchi

IPC分类号： G04F10/00 ,  G04F10/10

CPC分类号： G04F10/005 ,  G04F10/105

摘要： A first encoding part encodes a reference timing determined by a reference clock by using a delay line. A second encoding part encodes a measurement start timing and a measurement end timing of a measurement period determined by a measurement signal to be measured by also using the delay line. A count part counts the reference clocks included in the measurement period. A fraction calculation part calculates a start fraction number indicating a time difference from the measurement start timing and an immediately-following reference timing and an end fraction number indicating a time difference from the measurement end timing to an immediately-following reference timing, based on the encoding result. The fraction calculation part then calculates a fraction data indicating a difference between the measurement period and a product of the period of the reference timing and the count value of the count part.

公开(公告)号：US09667262B2

公开(公告)日：2017-05-30

申请号：US15189017

申请日：2016-06-22

申请人： DENSO CORPORATION

发明人： Shigenori Yamauchi ,  Nobuyuki Taguchi ,  Takamoto Watanabe

IPC分类号： H03K3/03 ,  H03L7/099 ,  H03L7/091 ,  H03L7/197 ,  H03K23/50 ,  G06F1/12 ,  H03K23/42 ,  H03K5/135 ,  G04F10/00

CPC分类号： H03L7/0997 ,  G04F10/005 ,  G06F1/12 ,  H03K3/0315 ,  H03K5/135 ,  H03K23/425 ,  H03K23/502 ,  H03L7/091 ,  H03L7/1974

摘要： A digital control oscillator circuit includes: a ring oscillator having delay elements delaying a pulse signal; a counter circuit counting the circulation number of the pulse signal; a rough period generation unit acquiring a period setting value as a magnification ratio for a reference clock, and counting the reference clock using an integer part of the ratio to generate a rough period timing; a fraction conversion unit converting a decimal point part of the ratio into the number of the elements passed by the pulse signal to generate a fraction; and an output processing unit selecting a timing when outputs of the ring oscillator and the counter circuit become values corresponding to the fraction as an output timing when a time corresponding to the fraction has passed after the rough period timing, and generating an output signal oscillating at a period represented by the period setting value according to the output timing.

公开(公告)号：US08907731B2

公开(公告)日：2014-12-09

申请号：US13740610

申请日：2013-01-14

申请人： Denso Corporation

发明人： Shigenori Yamauchi ,  Takamoto Watanabe ,  Tomohito Terazawa

IPC分类号： H03B5/30 ,  H03L7/00 ,  H03L7/08 ,  G01C19/5776 ,  H03L7/18

CPC分类号： H03L7/00 ,  G01C19/5776 ,  H03L7/08 ,  H03L7/18 ,  H03L2207/50

摘要： A digitally-controlled oscillator circuit receives a digital value and generates a driving signal for driving an oscillator at a frequency according to the received digital value. A time-to-digital converter circuit receives a detection signal of oscillation of the oscillator, receives the driving signal, and detects a phase difference between the detection signal and the driving signal. A control circuit receives the detected phase difference and controls the frequency of the driving signal generated by the digitally-controlled oscillator circuit, such that the detected phase difference coincides with a predetermined resonant phase difference to resonate the oscillator.

摘要翻译： 数字控制振荡器电路接收数字值，并根据接收到的数字值产生用于以频率驱动振荡器的驱动信号。 时间数字转换器电路接收振荡器的振荡检测信号，接收驱动信号，检测检测信号与驱动信号之间的相位差。 控制电路接收检测到的相位差并控制由数字控制的振荡电路产生的驱动信号的频率，使得检测的相位差与预定的谐振相位差重合，以谐振振荡器。