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1. 发明授权

US11088685B2 High-frequency switch 有权
公开(公告)号：US11088685B2
公开(公告)日：2021-08-10
申请号：US16616849
申请日：2017-07-03
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Takanobu Fujiwara , Mitsuhiro Shimozawa
IPC分类号： H03K17/16
摘要： An NMOS transistor performs electrical conduction or cut-off between a drain and a source by controlling a potential at a gate. A resistive element is connected between a back gate of the NMOS transistor and a high-frequency ground. A first switching circuit is disposed in parallel with the resistive element between the back gate and the high-frequency ground and causes a short circuit between the back gate and the high-frequency ground upon cut-off.

2. 发明授权

US10944360B2 Local oscillator 有权
公开(公告)号：US10944360B2
公开(公告)日：2021-03-09
申请号：US16639933
申请日：2017-09-19
申请人： Mitsubishi Electric Corporation
发明人： Akihito Hirai , Mitsuhiro Shimozawa
IPC分类号： H03B27/00 , H03B5/12 , H03L7/099 , H03L7/24
摘要： A local oscillator of the present invention includes: a frequency generator for outputting first and second sinusoidal signals having the same frequency but mutually different phases; a phase detector for outputting either a positive or a negative voltage depending on whether a phase difference between the first and second sinusoidal signals output from the frequency generator is greater than a reference phase difference; and a comparator for outputting a comparison result between a voltage output from the phase detector and a reference voltage, or a comparison result between the voltage output from the phase detector and a voltage obtained by inverting the polarity of the voltage, in which the frequency generator controls the phase of the first sinusoidal signal so that the phase difference approaches the reference phase difference by using the comparison result output from the comparator, enabling generating IQ signals having higher phase accuracy than conventional local oscillators.

3. 发明授权

US10763826B2 Polyphase filter 有权
公开(公告)号：US10763826B2
公开(公告)日：2020-09-01
申请号：US16479894
申请日：2017-03-02
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Akihito Hirai , Mitsuhiro Shimozawa
IPC分类号： H03H11/04 , H03H11/22
摘要： A first transistor (2a), a second transistor (2b), a third transistor (2c) and a fourth transistor (2d) are provided. A first transistor (2a) amplifies a first I signal VIP inputted from a first input terminal (1a). A second transistor (2b) amplifies a first Q signal VQP inputted from a second input terminal (1b). A third transistor (2c) amplifies a second I signal VIN when the second I signal VIN is inputted from a third input terminal (1c), the second I signal VIN forming a differential signal with the first I signal VIP. A fourth transistor (2d) amplifies a second Q signal VQN when the second Q signal VQN is inputted from a fourth input terminal (1d), the second Q signal VQN forming a differential signal with the first Q signal VQP.

4. 发明授权

US09543898B2 Microwave amplifier device 有权
标题翻译：微波放大器装置
公开(公告)号：US09543898B2
公开(公告)日：2017-01-10
申请号：US14429040
申请日：2013-09-13
申请人： Mitsubishi Electric Corporation
发明人： Yoshinori Tsuyama , Hiroyuki Nonomura , Hiroshi Otsuka , Hifumi Noto , Yoshinori Yasunaga , Mitsuhiro Shimozawa , Yuichi Fujimoto
IPC分类号： H03F3/191 , H03F1/02 , H03F3/24 , H03F3/19 , H03F3/60 , H03F1/32
CPC分类号： H03F1/0205 , H03F1/3205 , H03F3/19 , H03F3/245 , H03F3/601 , H03F2200/108 , H03F2200/12 , H03F2200/267 , H03F2200/391 , H03F2200/555
摘要： A microwave amplifier including: a bias circuit that includes a line having an electrical length of one quarter the wavelength at the frequency configured to be amplified by the microwave amplifier and being connected between the output terminal of an amplifier and a bias voltage source, and a capacitor connected between a terminal where the line is connected to the bias voltage source and a ground that defines the reference potential of the microwave amplifier; and a resonant circuit that includes a resistor and a capacitor connected in series between the ground and the terminal where the line is connected to the bias voltage source.
摘要翻译：一种微波放大器，包括：偏置电路，其包括具有配置为由微波放大器放大并被连接在放大器的输出端和偏置电压源之间的频率的四分之一波长的线，以及电容器连接在线路连接到偏置电压源的端子和限定微波放大器参考电位的地线之间; 以及谐振电路，其包括电阻器和串联连接在接地和端子之间的电容器，其中线路连接到偏置电压源。

5. 发明申请

US20150222231A1 MICROWAVE AMPLIFIER DEVICE 有权
标题翻译： MICROWAVE放大器器件
公开(公告)号：US20150222231A1
公开(公告)日：2015-08-06
申请号：US14429040
申请日：2013-09-13
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Yoshinori Tsuyama , Hiroyuki Nonomura , Hiroshi Otsuka , Hifumi Noto , Yoshinori Yasunaga , Mitsuhiro Shimozawa , Yuichi Fujimoto
IPC分类号： H03F1/02 , H03F3/19
CPC分类号： H03F1/0205 , H03F1/3205 , H03F3/19 , H03F3/245 , H03F3/601 , H03F2200/108 , H03F2200/12 , H03F2200/267 , H03F2200/391 , H03F2200/555
摘要： A microwave amplifier including: a bias circuit that includes a line having an electrical length of one quarter the wavelength at the frequency configured to be amplified by the microwave amplifier and being connected between the output terminal of an amplifier and a bias voltage source, and a capacitor connected between a terminal where the line is connected to the bias voltage source and a ground that defines the reference potential of the microwave amplifier; and a resonant circuit that includes a resistor and a capacitor connected in series between the ground and the terminal where the line is connected to the bias voltage source.
摘要翻译：一种微波放大器，包括：偏置电路，其包括具有配置为由微波放大器放大并被连接在放大器的输出端和偏置电压源之间的频率的四分之一波长的线，以及电容器连接在线路连接到偏置电压源的端子和限定微波放大器参考电位的地线之间; 以及谐振电路，其包括电阻器和串联连接在接地和端子之间的电容器，其中线路连接到偏置电压源。

6. 发明授权

US11329632B2 Variable inductor circuit 有权
公开(公告)号：US11329632B2
公开(公告)日：2022-05-10
申请号：US16994102
申请日：2020-08-14
申请人： Mitsubishi Electric Corporation
发明人： Yoshiaki Morino , Mitsuhiro Shimozawa
IPC分类号： H03H11/28 , H03B5/08 , H03F3/19
摘要： One inductor and another inductor are magnetically coupled to each other. A variable current source controls the current flowing in the one inductor. By controlling the current flowing in the one inductor, the inductance value of the other inductor is made variable.

7. 发明授权

US11088698B2 Phase-locked loop circuit 有权
公开(公告)号：US11088698B2
公开(公告)日：2021-08-10
申请号：US17107382
申请日：2020-11-30
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Sho Ikeda , Akihito Hirai , Koji Tsutsumi , Mitsuhiro Shimozawa
IPC分类号： H03L7/197 , H03L7/085
摘要： A phase-locked loop circuit includes: a division ratio control circuit controlling a division ratio of an output signal of a variable frequency divider on the basis of an addition signal of a negative feedback signal and a division ratio setting signal indicating the division ratio, in synchronization with a divided signal output from the variable frequency divider; a first phase detection circuit calculating a first phase detection signal indicating a phase of an output signal of a signal output circuit; a second phase detection circuit calculating a second phase detection signal indicating a phase of the output signal of a case where it is assumed that the division ratio control circuit controls the division ratio of the output signal of the variable frequency divider in synchronization with the reference signal; and a shift circuit generating a negative feedback signal from a difference between the first phase detection signal and the second phase detection signal, and outputting an addition signal of the generated negative feedback signal and the division ratio setting signal to the division ratio control circuit.

8. 发明授权

US11043955B2 PLL circuit 有权
公开(公告)号：US11043955B2
公开(公告)日：2021-06-22
申请号：US16938099
申请日：2020-07-24
申请人： Mitsubishi Electric Corporation
发明人： Koji Tsutsumi , Sho Ikeda , Mitsuhiro Shimozawa
IPC分类号： H03L7/099 , H03L7/087 , H03L7/18
摘要： A first pulse selector outputs an output signal of a variable frequency divider to phase frequency detectors in a time division manner. A second pulse selector outputs a reference signal from a reference signal source to the phase frequency detectors in a time division manner. Outputs of the phase frequency detectors are provided, respectively, for multiple disposed charge pump circuits.

9. 发明授权

US10461756B2 PLL circuit 有权
公开(公告)号：US10461756B2
公开(公告)日：2019-10-29
申请号：US16344758
申请日：2016-12-19
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Koji Tsutsumi , Yuki Yanagihara , Mitsuhiro Shimozawa
IPC分类号： H03L7/089 , H03L7/197 , H03L7/099
摘要： A first frequency accumulator (7a) operates using an output signal of a variable frequency divider (3) as a clock. A second frequency accumulator (7b) operates using a reference signal from a reference signal source (1) as a clock. A comparison operating circuit (11) compares the output values of the first frequency accumulator (7a) and the second frequency accumulator (7b), and calculates a parameter so that a result of the comparison falls within a set value. A digital-analog converter (9) outputs a signal to be added to an output of a loop filter (6) depending on the parameter output from the comparison operating circuit (11).

10. 发明授权

US11233495B2 Mixer 有权
公开(公告)号：US11233495B2
公开(公告)日：2022-01-25
申请号：US16936148
申请日：2020-07-22
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Shinya Yokomizo , Akihito Hirai , Mitsuhiro Shimozawa
IPC分类号： H03H7/20 , H03C3/09 , H03D7/16 , H04B7/08 , H04B7/06 , H01Q3/36 , H03H11/20
摘要： A mixer includes: a VGA (12) configured to amplify one of divided two portions of an input signal at a gain of cos θ; a VGA (13) configured to amplify another one of the divided two portions of the input signal at a gain of sin θ; an IQ generator (15) configured to input an LO wave, and output an LO wave in phase with the input LO wave and an LO wave having a phase difference of 90° with respect to the input LO wave; a mixer (16) configured to input the signal output from the VGA (12) and the LO wave which is output from the IQ generator (15), to output an RF signal; a second mixer (17) configured to input the signal from the VGA (13) and the LO wave which is output from the IQ generator, to output an RF signal; and a combiner (18).

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