公开(公告)号：US06486695B1

公开(公告)日：2002-11-26

申请号：US09546558

申请日：2000-04-10

Applicant: Chikashi Nakagawara

Inventor： Chikashi Nakagawara

IPC: H03K9007

CPC classification number: H03K5/08 ,  H04L25/08

Abstract: A protecting unit is provided. The protecting unit can prevent accidents from occurring that become problems when data are transmitted due to for instance LVDS and for instance laser light is emitted based on the data. The protecting unit is applied in an instrument comprising an input end to which differential signal is transmitted, the input end being attachable to and detachable from an input line. Here, the voltage at the input end when the input line is not connected is set to a voltage different from that generated at the input end when the input line is connected, variation of the voltage at the input end is transmitted to an input terminal of a differential input/output circuit, and the voltage at the input end or a portion corresponding thereto is compared with a prescribed voltage to fix a state of output of the differential input/output circuit to a prescribed state based on the compared results.

Abstract translation: 提供保护单元。 保护单元可以防止发生数据由于例如LVDS而发生的问题，并且例如基于数据发射激光。 保护单元被应用在包括输入端的仪器中，差分信号被传输到该输入端，该输入端可附接到输入线并可从输入线上拆卸。 这里，输入线未连接时的输入端的电压被设定为与输入线连接时在输入端产生的电压不同的电压，输入端的电压的变化被发送到 将差分输入/输出电路以及输入端或对应的部分的电压与规定电压进行比较，以根据比较结果将差分输入/输出电路的输出状态固定在规定状态。

公开(公告)号：US5126831A

公开(公告)日：1992-06-30

申请号：US677329

申请日：1991-03-29

Applicant: Chikashi Nakagawara

Inventor： Chikashi Nakagawara

IPC: H04N5/18 ,  H04N9/72

CPC classification number: H04N9/72

Abstract: In the clamping circuit, errors in direct current components contained in R, G and B signals from a matrix circuit are detected by comparing circuits and these errors are fed back to respective input capacitors through a reverse matrix circuit. The respective input capacitors are charged and discharged in response to the errors from the matrix circuit and the direct current parts of the outputs of the matrix circuit coincide so that the clamping levels of the outputs of the matrix circuit may coincide.

公开(公告)号：US5293514A

公开(公告)日：1994-03-08

申请号：US903486

申请日：1992-06-24

Applicant: Chikashi Nakagawara

Inventor： Chikashi Nakagawara

IPC: H03F3/45 ,  H03H11/04 ,  H04N1/00 ,  H03K5/22 ,  H03K5/00

CPC classification number: H03H11/0422 ,  H03F3/45511 ,  H03F2203/45006 ,  H03F2203/45008 ,  H03F2203/45074 ,  H03F2203/45082 ,  H03F2203/45188 ,  H03F2203/45201 ,  H03F2203/45212 ,  H03F2203/45402 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45631 ,  H03F2203/45641

Abstract: An integrating filter circuit having a reference potential source for supplying the integrating filter circuit with a prescribed reference potential, a transconductance circuit provided with a differential circuit, a variable current source couple to the differential circuit and output means coupled to the differential circuit for outputting an intermediate voltage of the outputs of the differential circuit, a common feedback loop with a comparison circuit coupled between the output means and the variable current source so as to stabilize the intermediate voltage in reference to a reference voltage supplied to the comparison circuit and capacitors coupled between the variable current source and the reference potential source.

Abstract translation: 一种具有用于向积分滤波器电路提供规定参考电位的参考电位源的积分滤波器电路，设置有差分电路的跨导电路，耦合到差分电路的可变电流源和耦合到差分电路的输出装置，用于输出 差分电路的输出的中间电压，与输出装置和可变电流源耦合的比较电路的公共反馈回路，以便相对于提供给比较电路的参考电压和耦合在比较电路之间的电容器来稳定中间电压 可变电流源和参考电位源。

公开(公告)号：US5111154A

公开(公告)日：1992-05-05

申请号：US632948

申请日：1990-12-24

Applicant: Chikashi Nakagawara

Inventor： Chikashi Nakagawara

IPC: H03H11/12 ,  H03H11/04

CPC classification number: H03H11/0422

Abstract: An analog active filter for realizing the secondary transfer function by using an amplifier having a feedback loop having a first integrating function block which integrates an input signal, second and third integrating function blocks which integrate an output signal, a first signal combining function block which combines signals from the first and second integrating function blocks with the input signal, a fourth integrating function block which integrates signals from the first signal combining function block, and a second signal combining function block which combines signals from the third and fourth integrating function blocks with the input signal and derives the output signal.

公开(公告)号：US08680867B2

公开(公告)日：2014-03-25

申请号：US13232783

申请日：2011-09-14

Applicant: Chikashi Nakagawara

Inventor： Chikashi Nakagawara

IPC: G01N27/416 ,  H02J7/00

CPC classification number: G01R31/3658 ,  G01R31/362

Abstract: A battery monitoring circuit monitors voltages of a plurality of secondary cells connected in series. The battery monitoring circuit comprises a first switch element, a second switch element, a third switch element, and a first capacitor. The battery monitoring circuit comprises an operational amplifier of which an inverting input terminal is connected to a second end of the first capacitor, a non-inverting input terminal is connected to a fixed potential, and an output is connected to the second end of the first capacitor. The battery monitoring circuit comprises an A/D converter which performs analog-to-digital conversion on a signal output by the operational amplifier and outputs an obtained digital signal. The battery monitoring circuit comprises a control circuit which performs on/off control on the first to third switch elements and controls operations of the operational amplifier and the A/D converter.

Abstract translation: 电池监视电路监视串联连接的多个二次电池的电压。 电池监视电路包括第一开关元件，第二开关元件，第三开关元件和第一电容器。 电池监视电路包括：运算放大器，其反相输入端子连接到第一电容器的第二端，非反相输入端子连接到固定电位，并且输出端连接到第一电容器的第二端 电容器。 电池监视电路包括对由运算放大器输出的信号执行模数转换并输出所获得的数字信号的A / D转换器。 电池监视电路包括对第一至第三开关元件执行开/关控制并控制运算放大器和A / D转换器的操作的控制电路。

公开(公告)号：US08643352B2

公开(公告)日：2014-02-04

申请号：US12884128

申请日：2010-09-16

Applicant: Chikashi Nakagawara

Inventor： Chikashi Nakagawara

IPC: G05F1/575

CPC classification number: H02M3/156

Abstract: According to embodiments, a switching power supply control apparatus causes a switching element to perform an ON/OFF once in each period of a clock signal, when an output voltage of a switching power supply formed by charging a capacitor with a current of a choke coil that stores/releases current energy in conjunction with the ON/OFF operation of the switching element is adjusted by exercising ON/OFF control of the switching element based on comparator output that compares the output voltage with a reference voltage.

Abstract translation: 根据实施例，开关电源控制装置使得开关元件在时钟信号的每个周期中执行ON / OFF一次，当通过用扼流线圈的电流对电容器充电而形成的开关电源的输出电压 通过基于将输出电压与参考电压进行比较的比较器输出进行开关元件的ON / OFF控制来调节与开关元件的ON / OFF操作一起存储/释放电流的能量。

公开(公告)号：US20110156681A1

公开(公告)日：2011-06-30

申请号：US12884128

申请日：2010-09-16

Applicant: Chikashi NAKAGAWARA

Inventor： Chikashi NAKAGAWARA

IPC: G05F1/10

CPC classification number: H02M3/156

Abstract: According to embodiments, a switching power supply control apparatus causes a switching element to perform an ON/OFF once in each period of a clock signal, when an output voltage of a switching power supply formed by charging a capacitor with a current of a choke coil that stores/releases current energy in conjunction with the ON/OFF operation of the switching element is adjusted by exercising ON/OFF control of the switching element based on comparator output that compares the output voltage with a reference voltage.

Abstract translation: 根据实施例，开关电源控制装置使得开关元件在时钟信号的每个周期中执行ON / OFF一次，当通过用扼流线圈的电流对电容器充电而形成的开关电源的输出电压 通过基于将输出电压与参考电压进行比较的比较器输出进行开关元件的ON / OFF控制来调节与开关元件的ON / OFF操作一起存储/释放电流的能量。

公开(公告)号：US5532644A

公开(公告)日：1996-07-02

申请号：US393278

申请日：1995-02-23

Applicant: Chikashi Nakagawara

Inventor： Chikashi Nakagawara

IPC: H03F1/02 ,  H03F1/32 ,  H03F3/45 ,  H03G1/00 ,  H03G3/10 ,  H03G7/06

CPC classification number: H03F1/3211 ,  H03F3/45479 ,  H03G1/0023 ,  H03G7/06

Abstract: A variable gain amplifying circuit is disclosed, which comprises a first transistor pair whose bases are connected to input terminals, a PN junction pair with bias currents that are collector currents of the first transistor pair, a second transistor pair with a common emitter that is a base input of a voltage difference of the PN junction pair, the common emitter having a current source, and a third transistor pair whose collectors are connected to corresponding emitters of the first transistor pair, whose bases are connected to the corresponding collectors, whose emitter are connected through a resistor, and whose emitters are connected to a current source for supplying bias currents, wherein outputs are obtained from the collector of the second transistor pair.

Abstract translation: 公开了一种可变增益放大电路，其包括其基极连接到输入端的第一晶体管对，具有作为第一晶体管对的集电极电流的偏置电流的PN结对，具有公共发射极的第二晶体管对， PN结对的电压差的基极输入，具有电流源的公共发射极和其集电极连接到第一晶体管对的相应发射极的第三晶体管对，其基极连接到相应的集电极，其发射极 通过电阻器连接，并且其发射极连接到用于提供偏置电流的电流源，其中从第二晶体管对的集电极获得输出。

公开(公告)号：US4942369A

公开(公告)日：1990-07-17

申请号：US170376

申请日：1988-03-18

Applicant: Chikashi Nakagawara ,  Akihiro Murayama ,  Shigeru Nakamura

Inventor： Chikashi Nakagawara ,  Akihiro Murayama ,  Shigeru Nakamura

IPC: G05F3/22

CPC classification number: G05F3/227

Abstract: A controlled current producing differential circuit apparatus for outputting a controlled stable current despite changes in a power supply voltage subject to unexpected fluctuation. The apparatus includes a control voltage supply source for supplying a control voltage in response to the power supply voltage, a reference voltage supply source responsive to the power supply voltage for supplying a predetermined reference voltage, and a differential circuit coupled to the control voltage supply source and the reference voltage supply source for outputting the controlled stable current in response to the difference between the control voltage and the reference voltage and for compensating for fluctuations in the power supply voltage.

公开(公告)号：US4709408A

公开(公告)日：1987-11-24

申请号：US760984

申请日：1985-07-31

Applicant: Tetsuro Itakura ,  Yoshitaka Kasagi ,  Mikio Koyama ,  Chikashi Nakagawara

Inventor： Tetsuro Itakura ,  Yoshitaka Kasagi ,  Mikio Koyama ,  Chikashi Nakagawara

IPC: H04N5/455 ,  H03J7/04 ,  H04N5/04 ,  H04N5/50 ,  H04B1/16

CPC classification number: H04N5/4446 ,  H03J7/04 ,  H04N5/50

Abstract: A circuit for processing an intermediate frequency signal comprises a limiter connected to receive the intermediate frequency signal to generate a carrier component of the intermediate frequency signal as an output, a phase locked loop circuit connected to receive one of the intermediate frequency signal and the carrier component from the limiter to generate an output signal which is phase-locked onto the carrier component of the intermediate frequency signal, a synchronous detector for synchronously detecting the intermediate frequency signal depended on the output signal from the phase locked loop circuit, and an automatic frequency circuit connected to receive the carrier component from the limiter and the output signal from the phase locked loop circuit to generate an output signal, as an automatic frequency tuning signal, in response to a frequency difference therebetween.

Abstract translation: 一种用于处理中频信号的电路包括限幅器，其连接以接收中频信号以产生作为输出的中频信号的载波分量;锁相环电路，被连接以接收中频信号和载波分量之一 从限幅器产生相位锁定在中频信号的载波分量上的输出信号，同步检波器，用于根据来自锁相环电路的输出信号同步检测中频信号;以及自动频率电路 连接以从限幅器接收载波分量和来自锁相环电路的输出信号，以响应于它们之间的频率差而产生作为自动频率调谐信号的输出信号。