公开(公告)号：US20230303388A1

公开(公告)日：2023-09-28

申请号：US18187820

申请日：2023-03-22

申请人： Kazuki ITOYAMA ,  Hajime KANO ,  Yuki UCHIDA ,  Takuma YOSHIDA ,  Mitsuaki DAIO ,  Yasuhiro HORIMOTO

发明人： Kazuki ITOYAMA ,  Hajime KANO ,  Yuki UCHIDA ,  Takuma YOSHIDA ,  Mitsuaki DAIO ,  Yasuhiro HORIMOTO

IPC分类号： B81B3/00

CPC分类号： B81B3/0021 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81B2203/0315 ,  B81B2203/0353 ,  B81B2203/04 ,  B81B2207/015

摘要： A MEMS microphone includes a diaphragm having conductivity, first and second variable capacitors respectively including first and second fixed electrodes, a first voltage output section that outputs a first voltage changed according to a change in a capacitance of the first variable capacitor, and a second voltage output section that outputs a second voltage changed according to a change in a capacitance of the second variable capacitor. The first and second fixed electrodes face the diaphragm. The capacitances of the first and second variable capacitors are changed in accordance with a vibration of the diaphragm. A first bias voltage is applied to the first fixed electrode. A reference voltage is applied to the second fixed electrode. A second bias voltage is applied to the diaphragm. A difference between the second bias voltage and the reference voltage is half of a difference between the first bias voltage and the reference voltage.

公开(公告)号：US20080225456A1

公开(公告)日：2008-09-18

申请号：US10583934

申请日：2004-12-20

申请人： Mitsuaki Daio ,  Daiki Yanagishima

发明人： Mitsuaki Daio ,  Daiki Yanagishima

IPC分类号： H01H43/02

CPC分类号： H02P8/36 ,  H02P8/12

摘要： An over-current protection circuit of a semiconductor circuit including a power transistor for outputting current output, a first output current detection circuit and a current limiter circuit for limiting the output current by stopping the output current of the power transistor for a predetermined period in response to a first detection signal from the output current detection circuit when the output current of the power transistor reaches a predetermined limit value. The over-current protection circuit has an output current detection transistor current-mirror connected to the power transistor and a second output current detection circuit for generating a second detection signal according to an output current of the output current detection transistor when the output current reaches the predetermined limit value. Further, the output current of the power transistor is cut off for the predetermined period by operating the current limiter circuit in response to the second detection signal.

摘要翻译： 包括用于输出电流输出的功率晶体管的半导体电路的过电流保护电路，第一输出电流检测电路和限流电路，用于通过在功率晶体管的输出电流中停止预定的时间间隔来限制输出电流 当功率晶体管的输出电流达到预定极限值时，输出到来自输出电流检测电路的第一检测信号。 过电流保护电路具有连接到功率晶体管的输出电流检测晶体管电流镜和第二输出电流检测电路，用于当输出电流达到输出电流检测晶体管时根据输出电流检测晶体管的输出电流产生第二检测信号 预定极限值。 此外，通过响应于第二检测信号操作限流器电路，将功率晶体管的输出电流切断预定的周期。

公开(公告)号：US07235938B2

公开(公告)日：2007-06-26

申请号：US10569239

申请日：2004-08-20

申请人： Mitsuaki Daio

发明人： Mitsuaki Daio

IPC分类号： H02K21/00

CPC分类号： G11B5/5526 ,  G11B5/5534

摘要： A back electromotive force detection circuit 12 incorporates an A/D conversion circuit 14 that converts the output from a differential amplifier circuit A2 into a digital signal and an offset calculation circuit 15 that sets the resistance value of a variable resistor R2 according to the output from the A/D conversion circuit 14. Based on the difference between the output from the A/D conversion circuit 14 as obtained when the drive current fed to a motor coil L equals zero and the output from the A/D conversion circuit 14 as obtained when the drive current fed to a motor coil L equals a predetermined value, the offset calculation circuit 15 sets the resistance value of the variable resistor R2.

摘要翻译： 反向电动势检测电路12包括将差分放大器电路A 2的输出转换为数字信号的A / D转换电路14和根据该电路设定可变电阻器R 2的电阻值的偏移计算电路15 从A / D转换电路14输出。 基于当馈送到电动机线圈L的驱动电流等于零时获得的来自A / D转换电路14的输出与来自A / D转换电路14的输出之间的差异，当驱动电流馈送到电动机时获得 线圈L等于预定值，偏移计算电路15设定可变电阻器R 2的电阻值。

公开(公告)号：US20070001632A1

公开(公告)日：2007-01-04

申请号：US10569239

申请日：2004-08-20

申请人： Mitsuaki Daio

发明人： Mitsuaki Daio

IPC分类号： H02P7/06

CPC分类号： G11B5/5526 ,  G11B5/5534

摘要： A back electromotive force detection circuit 12 incorporates an A/D conversion circuit 14 that converts the output from a differential amplifier circuit A2 into a digital signal and an offset calculation circuit 15 that sets the resistance value of a variable resistor R2 according to the output from the AID conversion circuit 14. Based on the difference between the output from the AID conversion circuit 14 as obtained when the drive current fed to a motor coil L equals zero and the output from the A/D conversion circuit 14 as obtained when the drive current fed to a motor coil L equals a predetermined value, the offset calculation circuit 15 sets the resistance value of the variable resistor R2.

摘要翻译： 反向电动势检测电路12包括将差分放大器电路A 2的输出转换为数字信号的A / D转换电路14和根据该电路设定可变电阻器R 2的电阻值的偏移计算电路15 从AID转换电路14输出。基于当馈送到电动机线圈L的驱动电流等于零时获得的AID转换电路14的输出与A / D转换电路14的输出之间的差异，如 馈送到电动机线圈L的驱动电流等于预定值，偏移计算电路15设置可变电阻器R 2的电阻值。

公开(公告)号：US20060187567A1

公开(公告)日：2006-08-24

申请号：US10561300

申请日：2004-08-20

申请人： Mitsuaki Daio

发明人： Mitsuaki Daio

IPC分类号： G11B21/02 ,  G11B15/12

CPC分类号： H02P7/06 ,  G11B5/5526 ,  H02P25/06

摘要： When the drive current fed to a VCM 3 is large, a driver D2 is turned on, and a driver D3 is turned off so that the current detected by a current detection amplifier A1 is fed back based on the voltage across a detection resistor RS1. When the drive current fed to the VCM 3 is small, the driver D2 is turned off, and the driver D3 is turned on so that the current detected by a current detection amplifier A2 is fed back based on the voltage across a detection resistor RS2.

摘要翻译： 当馈送到VCM 3的驱动电流较大时，驱动器D 2导通，驱动器D 3截止，使得由电流检测放大器A 1检测的电流基于检测电压而被反馈 电阻RS 1。 当馈送到VCM 3的驱动电流较小时，驱动器D 2截止，并且驱动器D 3导通，使得由电流检测放大器A 2检测的电流基于检测时的电压反馈 电阻RS 2。

公开(公告)号：US20100224761A1

公开(公告)日：2010-09-09

申请号：US12712778

申请日：2010-02-25

申请人： Mitsuaki Daio

发明人： Mitsuaki Daio

IPC分类号： H01L31/16 ,  H03F3/08

CPC分类号： G01V8/20 ,  H03K17/941 ,  H03K2217/94104

摘要： A light receiving detection circuit has a light receiving element configured to receive light emitted from a corresponding projection element, a current/voltage conversion circuit that converts a current signal passing through the light receiving element into a voltage signal, and a filter portion that has a plurality of stages. The filter portion has a high-pass filter and an amplifying circuit. The high-pass filter is able to be switched such that a time constant of the high-pass filter increases when the light receiving element receives light emitted by the corresponding projection element such that the time constant decreases when other projection elements except for the corresponding projection element emit the light.

摘要翻译： 光接收检测电路具有被配置为接收从相应的投影元件发射的光的光接收元件，将通过光接收元件的电流信号转换为电压信号的电流/电压转换电路，以及具有 多个阶段 滤波器部分具有高通滤波器和放大电路。 高通滤波器能够被切换，使得当光接收元件接收由相应的投影元件发射的光时，高通滤波器的时间常数增加，使得当除了对应的投影之外的其它投影元件时，时间常数减小 元素发光。

公开(公告)号：US07741811B2

公开(公告)日：2010-06-22

申请号：US12015307

申请日：2008-01-16

申请人： Mitsuaki Daio

发明人： Mitsuaki Daio

IPC分类号： H02J7/00

CPC分类号： H02J50/05 ,  H02J7/025 ,  H02J7/345

摘要： A parallel monitor circuit having a simple circuit configuration, in which a voltage divider circuit can be formed with resistors having the same resistance value, includes plural capacitors are connected in series, and a bypass device of each of parallel monitor circuits is connected in parallel with each capacitor. Plural voltages Va different from one another by a constant voltage are sequentially outputted from a digital-to-analog converter, and the voltages Va are inputted to plural parallel monitor circuits. When a charging voltage is higher than a monitor voltage determined by the voltage Va, each capacitor discharges through the bypass device, and the capacitor is kept at a predetermined monitor voltage.

摘要翻译： 具有简单电路结构的并联监视电路，其中可以形成具有相同电阻值的电阻器的分压器电路，包括多个电容器串联连接，并联每个并联监视电路的旁路装置与 每个电容。 从数模转换器依次输出由恒定电压彼此不同的多个电压Va，并将电压Va输入到多个并行监视电路。 当充电电压高于由电压Va确定的监视电压时，每个电容器通过旁路装置放电，电容器保持在预定的监视电压。

公开(公告)号：US20080169791A1

公开(公告)日：2008-07-17

申请号：US12015307

申请日：2008-01-16

申请人： Mitsuaki Daio

发明人： Mitsuaki Daio

IPC分类号： H02J7/00

CPC分类号： H02J50/05 ,  H02J7/025 ,  H02J7/345

摘要： A parallel monitor circuit having a simple circuit configuration, in which a voltage divider circuit can be formed with resistors having the same resistance value, includes plural capacitors are connected in series, and a bypass device of each of parallel monitor circuits is connected in parallel with each capacitor. Plural voltages Va different from one another by a constant voltage are sequentially outputted from a digital-to-analog converter, and the voltages Va are inputted to plural parallel monitor circuits. When a charging voltage is higher than a monitor voltage determined by the voltage Va, each capacitor discharges through the bypass device, and the capacitor is kept at a predetermined monitor voltage.

摘要翻译： 具有简单电路结构的并联监视电路，其中可以形成具有相同电阻值的电阻器的分压器电路，包括多个电容器串联连接，并联每个并联监视电路的旁路装置与 每个电容。 从数模转换器依次输出由恒定电压彼此不同的多个电压Va，并将电压Va输入到多个并行监视电路。 当充电电压高于由电压Va确定的监视电压时，每个电容器通过旁路装置放电，电容器保持在预定的监视电压。

公开(公告)号：US08440956B2

公开(公告)日：2013-05-14

申请号：US12712778

申请日：2010-02-25

申请人： Mitsuaki Daio

发明人： Mitsuaki Daio

IPC分类号： H01J40/14 ,  G06M7/00 ,  H03K17/78

CPC分类号： G01V8/20 ,  H03K17/941 ,  H03K2217/94104

摘要： A light receiving detection circuit has a light receiving element configured to receive light emitted from a corresponding projection element, a current/voltage conversion circuit that converts a current signal passing through the light receiving element into a voltage signal, and a filter portion that has a plurality of stages. The filter portion has a high-pass filter and an amplifying circuit. The high-pass filter is able to be switched such that a time constant of the high-pass filter increases when the light receiving element receives light emitted by the corresponding projection element such that the time constant decreases when other projection elements except for the corresponding projection element emit the light.

摘要翻译： 光接收检测电路具有被配置为接收从相应的投影元件发射的光的光接收元件，将通过光接收元件的电流信号转换为电压信号的电流/电压转换电路，以及具有 多个阶段 滤波器部分具有高通滤波器和放大电路。 高通滤波器能够被切换，使得当光接收元件接收由相应的投影元件发射的光时，高通滤波器的时间常数增加，使得当除了对应的投影之外的其它投影元件时，时间常数减小 元素发光。

公开(公告)号：US20090190280A1

公开(公告)日：2009-07-30

申请号：US10585340

申请日：2005-01-07

申请人： Mitsuaki Daio ,  Daiki Yanagishima

发明人： Mitsuaki Daio ,  Daiki Yanagishima

IPC分类号： H02H3/00

CPC分类号： H03K17/0822 ,  G01R31/40 ,  H02P8/12

摘要： A current limiter circuit in an IC having a power transistor and an output current detection circuit connected in series with the power transistor. A comparator, a first reference voltage generator circuit and a second reference voltage generator circuit are also included in the current limiter circuit. The comparator generates a control signal for stopping a drive of the power transistor for a predetermined time. The comparator generates the control signal according to a detection signal obtained by the output current detection circuit and a second reference voltage obtained by the second reference voltage generator circuit when the output current of the power transistor reaches a predetermined value larger than the predetermined limit value. The first reference voltage generator circuit is provided externally of the IC and the second reference voltage generator circuit is included within the IC.

摘要翻译： 具有与功率晶体管串联连接的功率晶体管和输出电流检测电路的集成电路中的限流电路。 比较器，第一参考电压发生器电路和第二参考电压发生器电路也包括在限流器电路中。 比较器产生用于停止功率晶体管的驱动一段预定时间的控制信号。 当功率晶体管的输出电流达到大于预定极限值的预定值时，比较器根据由输出电流检测电路获得的检测信号和由第二参考电压发生器电路获得的第二参考电压产生控制信号。 第一参考电压发生器电路设置在IC的外部，第二参考电压发生器电路被包括在IC内。