专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2009021685A Constant current source circuit and differential amplifier device 审中-公开
标题翻译：恒定电流源电路和差分放大器器件
公开(公告)号：JP2009021685A
公开(公告)日：2009-01-29
申请号：JP2007181090
申请日：2007-07-10
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： TSUTSUMI TSUNEJI , SUEMATSU KENJI , ONOMA FUMIKI
IPC分类号： H03F3/343 , H03F1/56 , H03F3/45
摘要： PROBLEM TO BE SOLVED: To obtain a constant current source circuit for ensuring an output impedance of a constant current source portion even in a high-frequency region and suppressing deterioration of a common mode rejection ratio of a differential amplifier circuit, and to provide the differential amplifier device.
SOLUTION: The constant current source circuit is provided with a reference current source 11 for supplying driving current, and a current mirror circuit 12 for turning back a current supplied from the reference current source 11 to supply it to the differential amplifier circuit 2, wherein a resistor R3 is disposed between the current mirror circuit 12 and the differential amplifier circuit 2. In this way, the output impedance of the constant current source portion 12a can be ensured even in the high-frequency region and the deterioration of the common mode rejection ratio CMRR of the differential amplifier circuit 2 can be suppressed.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了获得恒定电流源电路，即使在高频区域中也能确保恒定电流源部分的输出阻抗，并且抑制差分放大器电路的共模抑制比的劣化，并且提供差分放大器装置。
解决方案：恒流源电路设置有用于提供驱动电流的参考电流源11和用于使从参考电流源11提供的电流转回以将其提供给差分放大器电路2的电流镜电路12 其中，在电流镜电路12和差分放大电路2之间设置有电阻器R.这样，即使在高频区域也能够确保恒流源部12a的输出阻抗，可以抑制差分放大器电路2的模式抑制比CMRR。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2009027618A Transceiver 有权
标题翻译：收发器
公开(公告)号：JP2009027618A
公开(公告)日：2009-02-05
申请号：JP2007190970
申请日：2007-07-23
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： ONOMA FUMIKI , TSUTSUMI TSUNEJI , SHINJO SHINTARO , SUEMATSU KENJI
IPC分类号： H04B1/40
摘要： PROBLEM TO BE SOLVED: To provide a transceiver suppressing leakage of a local oscillation signal for reception to a quadrature modulator for transmission so as to prevent deterioration of reception characteristics even when frequency division duplex is performed.
SOLUTION: A transceiver has a frequency divider 3 dividing a frequency of a local oscillation signal A by a division number of two or more, and a local oscillation signal switching circuit 4 outputting a local oscillation signal A' divided by the frequency divider 3 as a local oscillation signal for transmission and outputting a local oscillation signal B as a local oscillation signal for reception when frequency division duplex is performed.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供抑制用于接收的本地振荡信号的泄漏到正交调制器以进行传输的收发机，以便即使在执行频分双工时也能防止接收特性的恶化。解决方案：收发器具有分频器3，其将本地振荡信号A的频率除以2以上的分频数，以及输出本地振荡信号A'除以分频器的本地振荡信号切换电路4 3作为用于发送的本地振荡信号，并且输出本地振荡信号B作为执行频分双工时的接收的本地振荡信号。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2008306296A Mixer circuit 有权
标题翻译：混频器电路
公开(公告)号：JP2008306296A
公开(公告)日：2008-12-18
申请号：JP2007149538
申请日：2007-06-05
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： ONOMA FUMIKI , SHINJO SHINTARO , SUEMATSU KENJI
IPC分类号： H03D7/14 , H03F3/45
摘要： PROBLEM TO BE SOLVED: To provide a mixer circuit which has high saturation characteristics by suppressing a decrease in the collector current of a bipolar transistor for signal input even when an input signal is a large signal. SOLUTION: The mixer circuit comprises: a pair of input transistors 4a and 4b inputting differential signals of intermediate or high frequency; signal conversion circuits 5a to 5d which convert the differential signals of intermediate or high frequency input by the input transistor pair into differential signals of high or intermediate frequency using differential signal of local oscillation waves; a transistor 7 connected to emitter terminals of the input transistor pair; a biasing transistor 8 constituting a current mirror with the transistor 7; a power monitor circuit 11 which monitors the output differential signals or input differential signals of the signal conversion circuits as input electric power; and P-type current mirroring circuits 10a and 10b which use the output current of the power monitoring circuit as a reference current, and the output current of the P-type current mirror circuits is the reference current of a biasing bipolar transistor. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：即使当输入信号是大信号时，通过抑制用于信号输入的双极晶体管的集电极电流的降低来提供具有高饱和特性的混频器电路。解决方案：混频器电路包括：一对输入中间或高频差分信号的输入晶体管4a和4b; 信号转换电路5a至5d，其使用本地振荡波的差分信号将由输入晶体管对输入的中频或高频差分信号转换成高频或中频差分信号; 连接到输入晶体管对的发射极端子的晶体管7; 与晶体管7构成电流镜的偏置晶体管8; 功率监视电路11，其监视输出差分信号或输入信号转换电路的差分信号作为输入电力; 以及使用功率监视电路的输出电流作为参考电流的P型电流镜像电路10a和10b，P型电流镜电路的输出电流是偏置双极晶体管的参考电流。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2008178027A Mixer circuit 有权
标题翻译：混频器电路
公开(公告)号：JP2008178027A
公开(公告)日：2008-07-31
申请号：JP2007011728
申请日：2007-01-22
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： ONOMA FUMIKI , SHINJO SHINTARO , TSUTSUMI TSUNEJI , SHIMOZAWA MITSUHIRO , SUEMATSU KENJI
IPC分类号： H03D7/14 , H03G3/10
摘要： PROBLEM TO BE SOLVED: To obtain a mixer circuit capable of achieving high saturation characteristics by suppressing a base potential drop of an RF signal input bipolar transistor even when an RF signal to be input to the RF signal input bipolar transistor is an intense signal.
SOLUTION: A base current compensation bipolar transistor 24 is provided which compensates for a base current Ib of a current mirror constituted of RF signal input bipolar transistors 13a and 13b and a bias bipolar transistor 22, and a current supply circuit 25 supplies to the bias bipolar transistor 22 a current corresponding to a compensation amount of the base current Ib due to the base current compensation bipolar transistor 24.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使要输入到RF信号输入双极晶体管的RF信号是强烈的，通过抑制RF信号输入双极晶体管的基极电位降来获得能够实现高饱和特性的混频器电路信号。解决方案：提供基极电流补偿双极晶体管24，其补偿由RF信号输入双极晶体管13a和13b以及偏置双极晶体管22构成的电流镜的基极电流Ib，并且电流供应电路25供应到偏置双极晶体管22由于基极电流补偿双极晶体管24而对应于基极电流Ib的补偿量的电流。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2010230550A Radar receiving device 审中-公开
标题翻译：雷达接收设备
公开(公告)号：JP2010230550A
公开(公告)日：2010-10-14
申请号：JP2009079583
申请日：2009-03-27
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： ONOMA FUMIKI
IPC分类号： G01S7/292
摘要： PROBLEM TO BE SOLVED: To reconcile a capacity for receiving a signal in a wide dynamic range through a single signal route with a capacity hardly lowering a signal-to-noise ratio of the signal, in a wideband radar receiving device. SOLUTION: In this wideband radar receiving device, a circuit for detecting a current consumption of a low-noise amplifier is provided to detect saturation of the low-noise amplifier, and thereby such a capacity can be acquired that, when input signal power is small, a gain is enhanced so that the signal-to-noise ratio is hardly lowered, and that, when input signal power is large, an attenuator set on the front of the low-noise amplifier is operated, to thereby receive the signal in the wide dynamic range. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：在宽带雷达接收装置中，通过具有几乎不降低信号的信噪比的容量的单个信号路由来协调用于在宽动态范围内接收信号的容量。解决方案：在这种宽带雷达接收装置中，提供用于检测低噪声放大器的电流消耗的电路以检测低噪声放大器的饱和度，从而可以获得这样的容量，即当输入信号功率小，增益增加，信噪比几乎不降低，并且当输入信号功率大时，设置在低噪声放大器的前面的衰减器被操作，从而接收信号在宽动态范围内。版权所有（C）2011，JPO＆INPIT

6. 发明专利

JP2009250628A Peak hold circuit 有权
标题翻译：峰值保持电路
公开(公告)号：JP2009250628A
公开(公告)日：2009-10-29
申请号：JP2008095156
申请日：2008-04-01
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： HIRAI AKIHITO , ONOMA FUMIKI , TSUTSUMI TSUNEJI , SUEMATSU KENJI
IPC分类号： G01R19/04 , H03F3/70 , H03K5/08
摘要： PROBLEM TO BE SOLVED: To provide a peak hold circuit capable of outputting a peak voltage even when the output voltage level of an operational amplifier is insufficient in such a case of high-speed input signals.
SOLUTION: The peak hold circuit is provided with an input comparator; a hold capacitor; a charging current circuit having a charging current control terminal for supplying a charging current for the hold capacitor; and a discharge circuit. The input comparator is constituted of an operational amplifier which compares a voltage of input signals with a hold voltage of the hold capacitor. A level shifter is provided between an output terminal of the operational amplifier and the charging current control terminal of the charging current circuit.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：即使在高速输入信号的情况下，即使运算放大器的输出电压电平不足，也能够提供能够输出峰值电压的峰值保持电路。
解决方案：峰值保持电路配有一个输入比较器; 保持电容; 充电电流电路，具有用于向保持电容器提供充电电流的充电电流控制端子; 和放电电路。输入比较器由将输入信号的电压与保持电容器的保持电压进行比较的运算放大器构成。在运算放大器的输出端子与充电电流电路的充电电流控制端子之间设置电平移位器。版权所有（C）2010，JPO＆INPIT

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式