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    • 23. 发明授权
    • Differential amplification circuit
    • 差分放大电路
    • US4701719A
    • 1987-10-20
    • US883724
    • 1986-07-09
    • Minoru Nagata
    • Minoru Nagata
    • H03F3/45
    • H03F3/45511H03F3/45085H03F3/45502H03F2203/45392H03F2203/45402H03F2203/45418H03F2203/45424H03F2203/45702
    • A first differential amplifier amplifies the differential signal component of the input signal supplied to input terminals. The differential component is then supplied to output terminals. The first differential amplifier comprises a first differential pair of transistors for producing a differential output current proportional to the input signal, and two load impedance elements connected to the outputs of the transistors of the first differential pair, for converting the output current to a voltage output. A current source is coupled to both load impedance elements. The in-phase component provided at the output terminals is detected by a detector circuit. A second differential amplifier detects the difference between the in-phase component and a reference value. This difference changes the output current of the current source, thereby controlling the in-phase component.
    • 第一差分放大器放大提供给输入端的输入信号的差分信号分量。 然后将差分分量提供给输出端。 第一差分放大器包括用于产生与输入信号成比例的差分输出电流的第一差分对晶体管和连接到第一差分对的晶体管的输出的两个负载阻抗元件,用于将输出电流转换为电压输出 。 电流源耦合到两个负载阻抗元件。 在输出端子处提供的同相分量由检测器电路检测。 第二差分放大器检测同相分量和参考值之间的差异。 该差异改变了电流源的输出电流,从而控制了同相分量。
    • 25. 发明授权
    • Temperature compensation circuit
    • 温度补偿电路
    • US08427227B2
    • 2013-04-23
    • US13403121
    • 2012-02-23
    • Koji HorieMinoru Nagata
    • Koji HorieMinoru Nagata
    • G05F3/02H03K17/14
    • H03F1/302H03F3/195H03F3/245H03F2200/447H03F2200/451
    • In one embodiment, a temperature compensation circuit includes a bias circuit configured to output a bias current having a current value increasing in proportion to an absolute temperature in a low-temperature region, and having a greater current value than the current value proportional to the absolute temperature in a high-temperature region, and a transistor which is supplied with the bias current. The bias circuit includes first to third transistors, a fourth transistor through which a first current flows, a fifth transistor, a sixth transistor through which a second current flows, and a control circuit having a connection terminal capable of being connected with an external resistor for adjusting a magnitude of the second current. The bias circuit generates a third current by adding the first current to the second current, and outputs the bias current that is the third current or a fourth current depending on the third current.
    • 在一个实施例中,温度补偿电路包括偏置电路,该偏置电路被配置为输出具有与低温区域中的绝对温度成比例增加的电流值的偏置电流,并且具有比与绝对值成比例的电流值更大的电流值 高温区域的温度,以及被提供偏置电流的晶体管。 偏置电路包括第一至第三晶体管,第一电流流经的第四晶体管,第五晶体管,第二电流流经的第六晶体管,以及具有能够与外部电阻器连接的连接端子的控制电路, 调整第二电流的大小。 偏置电路通过将第一电流加到第二电流来产生第三电流,并根据第三电流输出作为第三电流或第四电流的偏置电流。
    • 26. 发明申请
    • CURRENT MIRROR CIRCUIT
    • 当前镜像电路
    • US20110304387A1
    • 2011-12-15
    • US13046953
    • 2011-03-14
    • Kenichi HirashikiNorio HagiwaraTsutomu NakashimaMinoru Nagata
    • Kenichi HirashikiNorio HagiwaraTsutomu NakashimaMinoru Nagata
    • G05F1/10
    • G05F3/262
    • In one embodiment, a current mirror circuit includes first to fourth insulated gate field effect transistors (FETs), and a bias circuit. The gate electrodes of the first and second FETs are connected to each other. The source electrode of the third FET is connected to the drain electrode of the first FET, and the drain electrode of the third FET is connected to the gate electrodes of the first and second FETs and a current input terminal. The gate electrode of the fourth FET is connected to the gate electrode of the third FET, the source electrode of the fourth FET is connected to the drain electrode of the second FET, and the drain electrode of the fourth FET becomes a current output terminal. The bias circuit is configured to provide a bias voltage to the gate electrodes of the third and fourth FETs.
    • 在一个实施例中,电流镜电路包括第一至第四绝缘栅场效应晶体管(FET)和偏置电路。 第一和第二FET的栅电极彼此连接。 第三FET的源电极连接到第一FET的漏电极,第三FET的漏电极连接到第一和第二FET的栅电极以及电流输入端。 第四FET的栅电极与第三FET的栅电极连接,第四FET的源电极与第二FET的漏极连接,第四FET的漏极成为电流输出端。 偏置电路被配置为向第三和第四FET的栅电极提供偏置电压。
    • 29. 发明授权
    • Portable terminal apparatus for multimedia communication
    • 便携式终端设备,用于多媒体通信
    • US5949484A
    • 1999-09-07
    • US913161
    • 1997-09-08
    • Yuichiro NakayaYukio FujiiMinoru NagataMasanori Maruyama
    • Yuichiro NakayaYukio FujiiMinoru NagataMasanori Maruyama
    • H04N7/14H04N7/56H04N19/00H04N19/102H04N19/105H04N19/107H04N19/12H04N19/132H04N19/134H04N19/196H04N19/46H04N19/50H04N19/503H04N19/61H04N19/625H04N19/70H04N21/442H04N7/12H04M11/00
    • H04N7/56H04N19/162H04N19/164H04N19/176H04N19/61H04N7/142H04N19/107H04N2007/145
    • The electric power consumption by a terminal used for communication of multimedia information is controlled by changing the quality of transmitted information. The terminal is provided with input (101, 102, 106 and 107) through which such information as images and sounds is inputted, channel control sections (123 and 124) which output the input information to channels and receive information from the channels, output (103, 104, 108, 109 and 105) which output the information received from the channels in the form of images, sounds, etc., a codec (110) which is provided between the input and output and the control sections, encodes the input information in one of multiple encoding modes in which electric power is differently consumed, and decodes the information inputted from the channels, and a control section (133) which controls the selection of the encoding mode. This terminal can continue information communication for a required period of time at minimum power consumption at the sacrifice of the quality of transmitted information. Therefore, either the power consumption or quality of information can be adequately selected according to the transmission.
    • PCT No.PCT / JP95 / 00376 Sec。 371日期:1997年9月8日 102(e)1997年9月8日PCT PCT 1995年3月8日PCT公布。 WO96 / 27987 PCT公开号 日期1996年9月12日通过改变发送信息的质量来控制用于多媒体信息通信的终端的电力消耗。 终端设置有输入图像和声音等信息的输入(101,102,106和107),将输入信息输出到信道并从信道接收信息的信道控制部分(123和124),输出( 103,104,108,109和105),其以图像,声音等的形式输出从信道接收的信息,提供在输入和输出与控制部分之间的编解码器(110),对输入 以不同的方式消耗电力的多种编码模式之一的信息,以及对从该信道输入的信息进行解码;以及控制部,控制编码模式的选择。 该终端可以在牺牲所发送的信息的质量的情况下,以最小功耗持续所需时间段的信息通信。 因此,可以根据传输来适当地选择功耗或信息质量。