公开(公告)号：US20130055815A1

公开(公告)日：2013-03-07

申请号：US13404573

申请日：2012-02-24

申请人： Yoshinao YANAGISAWA ,  Masahiro OSHIO ,  Takayuki KIKUCHI ,  Toshihiro NISHIDA ,  Masayuki TAKAHASHI

发明人： Yoshinao YANAGISAWA ,  Masahiro OSHIO ,  Takayuki KIKUCHI ,  Toshihiro NISHIDA ,  Masayuki TAKAHASHI

IPC分类号： G01H13/00

CPC分类号： G01C19/5649 ,  G01C19/56

摘要： A signal processing circuit includes an I/V conversion circuit (current/voltage conversion section) that converts an oscillation current of a vibrator into a voltage, an RC filter (phase shift section) that shifts a phase of the output signal of the I/V conversion circuit, a full-wave rectifier (part of a drive amplitude control section) that binarizes a signal that has been shifted in phase to generate a switch control signal, a comparator (reference signal generation section) that generates a reference signal for synchronous detection based on the output signal of the I/V conversion circuit, and an EXOR circuit (clock signal generation section) that generates a clock signal for a switched capacitor filter (SCF) that has a frequency twice a frequency of a drive signal based on a phase difference between the reference signal and the switch control signal.

摘要翻译： 信号处理电路包括将振动器的振荡电流转换为电压的I / V转换电路（电流/电压转换部），将I / V转换电路的输出信号的相位移位的RC滤波器（相移部） V转换电路，将相位偏移的信号二值化以产生开关控制信号的全波整流器（驱动幅度控制部的一部分），生成用于同步的参考信号的比较器（参考信号生成部） 基于I / V转换电路的输出信号进行检测，以及EXOR电路（时钟信号生成部），该EXOR电路生成具有基于驱动信号的频率的两倍频率的开关电容滤波器（SCF）的时钟信号 参考信号与开关控制信号之间的相位差。

公开(公告)号：US20130057354A1

公开(公告)日：2013-03-07

申请号：US13404649

申请日：2012-02-24

申请人： Yoshinao YANAGISAWA ,  Masahiro OSHIO ,  Takayuki KIKUCHI ,  Toshihiro NISHIDA ,  Masayuki TAKAHASHI

发明人： Yoshinao YANAGISAWA ,  Masahiro OSHIO ,  Takayuki KIKUCHI ,  Toshihiro NISHIDA ,  Masayuki TAKAHASHI

IPC分类号： H03B5/30

CPC分类号： G01C19/574 ,  G01C19/5726

摘要： A driver circuit includes a comparator (drive signal generation section) that generates a drive signal based on a signal obtained by converting an oscillation current of a vibrator that has been input via a first signal line into a voltage using an I/V conversion circuit (current/voltage conversion section), and supplies the drive signal to the vibrator via a second signal line, an oscillation detection circuit (oscillation detection section) that detects whether or not the oscillation current has reached a predetermined value after the vibrator has started to oscillate, a startup oscillation circuit (startup oscillation section) that assists an oscillation operation of the vibrator until the oscillation current reaches the predetermined value, and a switch that separates a capacitor from the second signal line until the oscillation current reaches the predetermined value, and connects the capacitor to the second signal line when the oscillation current has reached the predetermined value.

摘要翻译： 驱动器电路包括：比较器（驱动信号生成部），其基于通过使用I / V转换电路将已经经由第一信号线输入的振动器的振荡电流转换为电压而获得的信号，生成驱动信号（ 电流/电压转换部），并且经由第二信号线向振动器提供驱动信号，振荡器开始振荡后检测振荡电流是否已经达到预定值的振荡检测电路（振荡检测部） 启动振荡电路（启动振荡部），其在振荡电流达到规定值之前辅助振动器的振荡动作，以及将电容器与第二信号线分离直到振荡电流达到规定值为止的开关， 当振荡电流达到预定值时，电容器到第二信号线 呃

公开(公告)号：US20130055810A1

公开(公告)日：2013-03-07

申请号：US13404475

申请日：2012-02-24

申请人： Yoshinao YANAGISAWA ,  Masahiro OSHIO ,  Takayuki KIKUCHI ,  Toshihiro NISHIDA ,  Masayuki TAKAHASHI

发明人： Yoshinao YANAGISAWA ,  Masahiro OSHIO ,  Takayuki KIKUCHI ,  Toshihiro NISHIDA ,  Masayuki TAKAHASHI

IPC分类号： G01C19/56

CPC分类号： G01C19/56 ,  G01C19/5776 ,  H03H9/2468

摘要： A detection circuit includes a synchronous detection circuit (synchronous detection section) that synchronously detects a signal that includes a detection signal of a vibrator (an output signal of an amplifier), a switched capacitor filter (SCF) circuit that filters a signal that has been synchronously detected by the synchronous detection circuit (an output signal of a programmable gain amplifier), and an output buffer that buffers and outputs a signal that has been filtered by the SCF circuit, the gain of the SCF circuit being larger than 1.

摘要翻译： 检测电路包括同步检测电路（同步检测部分），其同步地检测包括振动器的检测信号（放大器的输出信号）的信号，对已经被存储的信号进行滤波的开关电容滤波器（SCF）电路 由同步检测电路（可编程增益放大器的输出信号）同步检测的缓冲器，其输出缓冲并输出由SCF电路滤波的信号，SCF电路的增益大于1。