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1. 发明授权

US07054389B2 Carrier detection circuit and infrared ray remote control receiver 有权
公开(公告)号：US07054389B2
公开(公告)日：2006-05-30
申请号：US09919955
申请日：2001-08-02
申请人： Naruichi Yokogawa , Takeshi Nishino , Kazuo Noda
发明人： Naruichi Yokogawa , Takeshi Nishino , Kazuo Noda
IPC分类号： H03D1/00 , H04B7/00
CPC分类号： H04B10/6933
摘要： A carrier detection circuit of the present invention detects groups of pulses having a carrier frequency by using a detector, and integrates, by an integrator, a time in which the groups are detected, so as to generate a carrier detection level. Therefore, a transistor is only requested to have responsibility with respect to a frequency of a base band component, but not to the carrier frequency. This ensures a margin with respect to a response of the transistor, while allowing a feeble current to be used as charging and discharging currents for the capacitor. In this way, even if a capacitor in use has such a small capacity that the capacitor can be incorporated in an integrated circuit, the detection of the carrier is performed accurately. Meanwhile, by further providing a level change-over circuit, which increases an output of the detector relative to a reference integral value during a time in which the carrier is detected, it is possible to reduce malfunction caused by a light noise having swelling, in case an infrared ray remote control is used.

2. 发明申请

US20060008280A1 Receiving circuit and electronic apparatus for optical communication 失效
标题翻译：光通信接收电路和电子设备
公开(公告)号：US20060008280A1
公开(公告)日：2006-01-12
申请号：US11175340
申请日：2005-07-07
申请人： Naruichi Yokogawa , Takeshi Nishino
发明人： Naruichi Yokogawa , Takeshi Nishino
IPC分类号： H04B10/06
CPC分类号： H04B10/114
摘要： In an optical communication-use receiving circuit of the present invention, the pulse width of the received pulse which is a binary signal corresponding to the signal optical pulse is specified by using an integration circuit and a trigger generating circuit. If the pulse width of the received pulse is not shorter than a predetermined value, a signal having a fixed pulse width is outputted as an output signal from a one-shot pulse generating circuit, so that a pulse having a constant pulse width corresponding to the specified communication speed is outputted. Accordingly, if the pulse width deriving from the signal optical pulse is larger than a certain value, the communication is deemed as a low-speed communication, and a pulse having a constant pulse width corresponding to the communication speed is outputted. As a result, it is possible to realize a small-size receiving circuit and a small-size electronic device which require no external switching-over terminal.
摘要翻译：在本发明的光通信用接收电路中，通过使用积分电路和触发发生电路来规定作为与信号光脉冲对应的二进制信号的接收脉冲的脉冲宽度。如果接收脉冲的脉冲宽度不小于预定值，则从单触发脉冲发生电路输出具有固定脉冲宽度的信号作为输出信号，使得脉冲宽度对应于输出指定的通信速度。因此，如果从信号光脉冲导出的脉冲宽度大于一定值，则通信被认为是低速通信，并且输出具有与通信速度对应的恒定脉冲宽度的脉冲。结果，可以实现不需要外部切换端子的小尺寸接收电路和小型电子设备。

3. 发明授权

US06677732B1 Charge and/or discharge circuit, and carrier detector circuit using same 有权
标题翻译：充电和/或放电电路，以及使用其的载波检测器电路
公开(公告)号：US06677732B1
公开(公告)日：2004-01-13
申请号：US10189396
申请日：2002-07-08
申请人： Takahiro Inoue , Naruichi Yokogawa , Takeshi Nishino
发明人： Takahiro Inoue , Naruichi Yokogawa , Takeshi Nishino
IPC分类号： H01M1046
CPC分类号： H04B10/69 , H04L27/06
摘要： A charge/discharge circuit creates a carrier detection level based on a received signal in a carrier detector circuit for detecting the presence or absence of a carrier in such applications as a receiver for an IR remote controller. The charge/discharge circuit operates to amplify a current, that is produced in n-type transistors QN1, QN2, QN3 and a reference current source, in a p-type transistor QP1. The amplified current is mirrored by a current mirror circuit to be supplied as an emitter current of a p-type transistor QP2. The charge/discharge circuit charges a capacitor with a small current, i.e., a base current of the p-type transistor QP2. The charge/discharge circuit includes a bias voltage source which produces such a bias voltage that the emitter-collector voltage of the p-type transistor QP1 becomes substantially equal to the emitter-collector voltage of the p-type transistor QP2. As a result, it is possible to limit an error of a charge current charged into the capacitor, which is caused by the emitter-collector voltage dependent change of the collector current and thus the base current, known as the Early effect.
摘要翻译：充电/放电电路基于载波检测器电路中的接收信号创建载波检测电平，用于在诸如用于IR遥控器的接收机的应用中检测载波的存在或不存在。充电/放电电路用于在p型晶体管QP1中放大在n型晶体管QN1，QN2，QN3和参考电流源中产生的电流。放大的电流由电流镜电路镜像，以作为p型晶体管QP2的发射极电流提供。充电/放电电路以小电流（即p型晶体管QP2的基极电流）对电容器充电。充电/放电电路包括偏置电压源，其产生这样的偏置电压，使得p型晶体管QP1的发射极 - 集电极电压变得基本上等于p型晶体管QP2的发射极 - 集电极电压。结果，可以限制由集电极电流的发射极 - 集电极电压依赖的变化引起的充电到电容器中的充电电流的误差，从而限制被称为早期效应的基极电流。

4. 发明授权

US07460792B2 Receiving circuit and electronic apparatus for optical communication 失效
标题翻译：光通信接收电路和电子设备
公开(公告)号：US07460792B2
公开(公告)日：2008-12-02
申请号：US11175340
申请日：2005-07-07
申请人： Naruichi Yokogawa , Takeshi Nishino
发明人： Naruichi Yokogawa , Takeshi Nishino
IPC分类号： H04B10/06
CPC分类号： H04B10/114
摘要： In an optical communication-use receiving circuit of the present invention, the pulse width of the received pulse which is a binary signal corresponding to the signal optical pulse is specified by using an integration circuit and a trigger generating circuit. If the pulse width of the received pulse is not shorter than a predetermined value, a signal having a fixed pulse width is outputted as an output signal from a one-shot pulse generating circuit, so that a pulse having a constant pulse width corresponding to the specified communication speed is outputted. Accordingly, if the pulse width deriving from the signal optical pulse is larger than a certain value, the communication is deemed as a low-speed communication, and a pulse having a constant pulse width corresponding to the communication speed is outputted. As a result, it is possible to realize a small-size receiving circuit and a small-size electronic device which require no external switching-over terminal.
摘要翻译：在本发明的光通信用接收电路中，通过使用积分电路和触发发生电路来规定作为与信号光脉冲对应的二进制信号的接收脉冲的脉冲宽度。如果接收脉冲的脉冲宽度不小于预定值，则从单触发脉冲发生电路输出具有固定脉冲宽度的信号作为输出信号，使得脉冲宽度对应于输出指定的通信速度。因此，如果从信号光脉冲导出的脉冲宽度大于一定值，则通信被认为是低速通信，并且输出具有与通信速度对应的恒定脉冲宽度的脉冲。结果，可以实现不需要外部切换端子的小尺寸接收电路和小型电子设备。

5. 发明申请

US20050061954A1 Receiving circuit for free-space optical communication 有权
标题翻译：自由空间光通信接收电路
公开(公告)号：US20050061954A1
公开(公告)日：2005-03-24
申请号：US10928087
申请日：2004-08-30
申请人： Hiroaki Itoh , Naruichi Yokogawa , Takao Matsui
发明人： Hiroaki Itoh , Naruichi Yokogawa , Takao Matsui
IPC分类号： H03F3/08 , H01J40/14 , H01L31/00 , H03F1/26 , H03G3/20 , H03G3/30 , H04B10/11 , H04B10/112 , H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/60
CPC分类号： H03F3/08
摘要： An amplifier circuit AMP1 amplifies the difference between an output voltage from a current voltage conversion circuit 1 and a bias voltage. The current voltage conversion circuit 1 converts a photocurrent of a photodiode PD which detect incoming light into a voltage. A gm-amp AMP2 charges or discharges a capacity C1 by a current corresponding to the difference between the output voltage from the amplifier circuit AMP1 and a reference voltage V3. A field effect transistor M3 supplies a drain current, which is controlled by voltages at the respective terminals of the capacity C1, to the photodiode PD, in order to prevent the output voltage of the amplifier circuit AMP1 from being varied due to the influence of a DC photocurrent flowing in the photodiode PD. The gate of a field effect transistor M1 which is connected in parallel to a current voltage conversion resistor R1 has an identical voltage with the gate of the field effect transistor M3. On this account, as the DC photocurrent increases, the resistance decreases and the current voltage conversion resistor value decreases, and hence a noise voltage caused by shot noise decreases. As a result, the malfunction due to the shot noise generated in the photodiode is prevented.
摘要翻译：放大电路AMP1放大来自电流电压转换电路1的输出电压与偏置电压之间的差。当前的电压转换电路1将检测入射光的光电二极管PD的光电流转换为电压。放大器AMP2通过对应于来自放大器电路AMP1的输出电压与参考电压V3之间的差的电流对电容C1进行充电或放电。场效应晶体管M3将由电容C1的各个端子处的电压控制的漏极电流提供给光电二极管PD，以防止放大器电路AMP1的输出电压由于a的影响而变化 DC光电流在光电二极管PD中流动。与电流电压转换电阻R1并联连接的场效应晶体管M1的栅极与场效应晶体管M3的栅极具有相同的电压。因此，随着直流光电流的增加，电阻降低，电流转换电阻值减小，因此引起的噪声电压降低。结果，防止了由光电二极管中产生的散粒噪声引起的故障。

6. 发明授权

US06812546B2 Current mirror circuit and optical signal circuit using same 有权
公开(公告)号：US06812546B2
公开(公告)日：2004-11-02
申请号：US10614058
申请日：2003-07-08
申请人： Takahiro Inoue , Naruichi Yokogawa
发明人： Takahiro Inoue , Naruichi Yokogawa
IPC分类号： H01L27082
CPC分类号： G05F3/265 , H01L29/0692 , H01L29/7322 , H01L29/735 , H01L31/03529 , H01L31/1105
摘要： When a current mirror circuit is composed of transistors that inevitably form a parasitic photodiode between an epitaxial layer and a substrate layer because of structure of an integrated circuit, a photocurrent increases in proportional to an area of the epitaxial layer. Thus, the area of the epitaxial layer is adjusted in accordance with a current ratio of the current mirror, so as to allow the photocurrent to affect equally on both input and output sides of the current mirror circuit, i.e., so as to cancel the photocurrent. With this, in a current mirror circuit provided in an integrated circuit, it is possible to eliminate the influence of the photocurrent, without considerably increasing an element area or taking special measures to shield light.

7. 发明授权

US06693466B2 Comparator circuit and infrared signal receiving apparatus 有权
标题翻译：比较电路和红外信号接收装置
公开(公告)号：US06693466B2
公开(公告)日：2004-02-17
申请号：US10293563
申请日：2002-11-14
申请人： Takahiro Inoue , Naruichi Yokogawa , Takeshi Nishino
发明人： Takahiro Inoue , Naruichi Yokogawa , Takeshi Nishino
IPC分类号： H03K5153
CPC分类号： H03K5/2418 , H03K3/02337 , H03K3/2897
摘要： The present invention has an object to control easily the pulse width of an output by operating a limiting circuit appropriately even if the power voltage is low. A limiting circuit is provided on the input side of a hysteresis comparator circuit to prevent saturation. A limit voltage Vlimit is set by a bias circuit so as to change in accordance with the operation of the hysteresis comparator circuit. When an input voltage Vsig exceeds a hysteresis threshold voltage Vth, the limit voltage Vlimit is dropped in response to a drop of the hysteresis threshold voltage Vth. Thus, the width of the pulse width can be controlled while maintaining the condition that the limit voltage Vlimit is higher than the hysteresis threshold voltage Vth.
摘要翻译：本发明的目的是即使电源电压低，也可以适当地操作限制电路来容易地控制输出的脉冲宽度。在滞环比较器电路的输入侧提供限制电路以防止饱和。极限电压Vlimit由偏置电路设置，以便根据滞后比较器电路的操作而改变。当输入电压Vsig超过滞后阈值电压Vth时，极限电压Vlimit响应于滞后阈值电压Vth的下降而下降。因此，可以控制脉冲宽度的宽度，同时保持极限电压Vlimit高于滞后阈值电压Vth的条件。

8. 发明授权

US08217335B2 Optical modulation-type detection device and electronic device 有权
标题翻译：光调制式检测装置及电子装置
公开(公告)号：US08217335B2
公开(公告)日：2012-07-10
申请号：US12548543
申请日：2009-08-27
申请人： Takuma Hiramatsu , Ryohhei Tada , Isamu Kawabe , Naruichi Yokogawa
发明人： Takuma Hiramatsu , Ryohhei Tada , Isamu Kawabe , Naruichi Yokogawa
IPC分类号： G01N21/55
CPC分类号： G01S17/026 , G01S7/4861 , G01S7/4876 , H03K17/941 , H03K2217/94108
摘要： An optical modulation-type detection device has a noise detection mode having (i) an offset canceling (hereinafter referred to as “OC”) period in which (a) the light-reception signal pathway of a pulse signal converting section is cut off so that an offset of the pulse signal converting section is suppressed and (b) the light-reception signal pathway of the pulse signal converting section is reconnected while a state in which the offset is suppressed is being maintained, at an end of the OC period, and (ii) an asynchronous reception period in which whether or not asynchronous reception occurs is detected after the first period, and an object detection mode having a synchronous reception period in which whether or not synchronous reception occurs is detected after the asynchronous reception is not detected in the noise detection mode.
摘要翻译：光调制型检测装置具有噪声检测模式，具有（i）偏移消除（以下称为“OC”）周期，其中（a）脉冲信号转换部的光接收信号路径被切断，抑制脉冲信号转换部分的偏移，并且在OC周期结束时，保持偏移被抑制的状态下重新连接脉冲信号转换部分的光接收信号通路，以及（ii）异常接收时段，其中在第一时段之后检测到异步接收发生，并且在没有检测到异步接收之后检测到具有同步接收周期的对象检测模式，其中是否发生同步接收发生在噪声检测模式下。

9. 发明申请

US20100067017A1 OPTICAL MODULATION-TYPE DETECTION DEVICE AND ELECTRONIC DEVICE 有权
标题翻译：光学调制型检测装置和电子装置
公开(公告)号：US20100067017A1
公开(公告)日：2010-03-18
申请号：US12548543
申请日：2009-08-27
申请人： Takuma HIRAMATSU , Ryohhei TADA , Isamu KAWABE , Naruichi YOKOGAWA
发明人： Takuma HIRAMATSU , Ryohhei TADA , Isamu KAWABE , Naruichi YOKOGAWA
IPC分类号： G01N21/55
CPC分类号： G01S17/026 , G01S7/4861 , G01S7/4876 , H03K17/941 , H03K2217/94108
摘要： An optical modulation-type detection device has a noise detection mode having (i) an offset canceling (hereinafter referred to as “OC”) period in which (a) the light-reception signal pathway of a pulse signal converting section is cut off so that an offset of the pulse signal converting section is suppressed and (b) the light-reception signal pathway of the pulse signal converting section is reconnected while a state in which the offset is suppressed is being maintained, at an end of the OC period, and (ii) an asynchronous reception period in which whether or not asynchronous reception occurs is detected after the first period, and an object detection mode having a synchronous reception period in which whether or not synchronous reception occurs is detected after the asynchronous reception is not detected in the noise detection mode.
摘要翻译：光调制型检测装置具有噪声检测模式，具有（i）偏移消除（以下称为“OC”）周期，其中（a）脉冲信号转换部的光接收信号路径被切断，抑制脉冲信号转换部分的偏移，并且在OC周期结束时，保持偏移被抑制的状态下重新连接脉冲信号转换部分的光接收信号通路，以及（ii）异常接收时段，其中在第一时段之后检测到异步接收发生，并且在没有检测到异步接收之后检测到具有同步接收周期的对象检测模式，其中是否发生同步接收发生在噪声检测模式下。

10. 发明授权

US06480311B1 Peak-hold circuit and an infrared communication device provided with such a circuit 失效
标题翻译：峰值保持电路和设置有这种电路的红外通信设备
公开(公告)号：US06480311B1
公开(公告)日：2002-11-12
申请号：US09132898
申请日：1998-08-12
申请人： Takanori Okuda , Naruichi Yokogawa
发明人： Takanori Okuda , Naruichi Yokogawa
IPC分类号： H04B1024
CPC分类号： H03K5/1532 , H03G3/3084 , H03K5/084
摘要： In a peak-hold circuit, a hold capacitor captures the peak value of an input signal and a reset section carries out a resetting operation on the holding value of the hold capacitor when, upon switching inputs, it receives a reset signal. The reset section, upon receipt of the reset signal, improves the response speed of a peak-hold section by a predetermined time period. The reset section is provided with a constant current circuit and a switching circuit for respectively increasing a charging current and a discharging current of the peak-hold section.
摘要翻译：在峰值保持电路中，保持电容器捕获输入信号的峰值，并且当切换输入时，复位部分接收到复位信号，对保持电容器的保持值执行复位操作。复位部分在接收到复位信号时，将峰值保持部分的响应速度提高预定时间段。复位部分设置有用于分别增加峰值保持部分的充电电流和放电电流的恒流电路和开关电路。

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