公开(公告)号：US09503035B2

公开(公告)日：2016-11-22

申请号：US14571929

申请日：2014-12-16

Applicant: TDK CORPORATION

Inventor： Tomohiko Shibuya ,  Atsushi Ajioka ,  Atsushi Tsumita ,  Sadaharu Yoneda

IPC: H03F3/68 ,  H03F3/193 ,  H03F3/21 ,  H03F3/24 ,  H03F3/195

CPC classification number: H03F3/193 ,  H03F3/195 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/451 ,  H03F2203/21106 ,  H03F2203/21142

Abstract: There is provided a high-frequency amplifier including a divider, a plurality of amplifiers for amplifying a high-frequency signal distributed by the divider and outputting the amplified high-frequency signal, a combiner for combining amplified high-frequency signals, a base substrate, a conductor pattern that is connected to a ground end of each of the amplifiers, and a ground electrode. Each of the conductor patterns has a first conductive portion. A slot is disposed between the two conductor patterns connected to the corresponding adjacent amplifiers. Between the adjacent amplifiers, two vias are formed so that the slot is sandwiched between the vias. One of the two conductor patterns is connected to the ground electrode via one of the two vias, and the other one of the conductor patterns is connected to the ground electrode via the other one of the two vias.

Abstract translation: 提供了一种高频放大器，包括分频器，用于放大由分频器分配的高频信号并输出​​放大的高频信号的多个放大器，用于组合放大的高频信号的组合器，基底衬底， 连接到每个放大器的接地端的导体图案和接地电极。 每个导体图案具有第一导电部分。 在连接到相应的相邻放大器的两个导体图案之间设置槽。 在相邻的放大器之间，形成两个通孔，使得狭槽夹在通孔之间。 两个导体图案中的一个通过两个通孔中的一个连接到接地电极，另一个导体图案经由两个通孔中的另一个连接到接地电极。

公开(公告)号：US09184706B2

公开(公告)日：2015-11-10

申请号：US14150219

申请日：2014-01-08

Applicant: TDK CORPORATION

Inventor： Tomohiko Shibuya ,  Atsushi Ajioka ,  Sadaharu Yoneda ,  Atsushi Tsumita

IPC: H03G3/20 ,  H03F3/193 ,  H03F1/02

CPC classification number: H03F3/193 ,  H03F1/0266 ,  H03F2200/408

Abstract: Since a high-frequency signal that is output from a high-frequency oscillator circuit section is detected in a detector circuit and a bias of a negative voltage is supplied from a bias circuit section to the high-frequency amplifier circuit section with a detection voltage that is detected, a negative power supply circuit such as a DC/DC converter or a peripheral circuit is not required, and since a negative bias voltage can be supplied to a high-frequency amplifier circuit, downsizing can be achieved with a low cost.

Abstract translation: 由于在检测器电路中检测到从高频振荡电路部分输出的高频信号，并且从偏置电路部分向高频放大器电路部分提供负电压的偏压，检测电压为 ，则不需要诸如DC / DC转换器或外围电路的负电源电路，并且由于可以向高频放大器电路提供负偏压，因此可以以低成本实现小型化。

公开(公告)号：US09666216B1

公开(公告)日：2017-05-30

申请号：US15181490

申请日：2016-06-14

Applicant: TDK Corporation

Inventor： Tatsuhiro Kobayashi ,  Sadaharu Yoneda ,  Tsutomu Aoyama

IPC: G11B27/36 ,  G11B5/39 ,  G11B5/09 ,  G11B5/17 ,  G11B5/00

CPC classification number: G11B5/3909 ,  G11B5/02 ,  G11B5/09 ,  G11B5/17 ,  G11B5/235 ,  G11B5/3123 ,  G11B5/3146 ,  G11B2005/0024

Abstract: A magnetic recording device includes a magnetic recording medium, a microwave assisted magnetic head having a main magnetic pole for generating a recording magnetic field, and a spin torque oscillator provided near the main magnetic pole for generating a microwave magnetic field, a recording current supply part for supplying a recording current to recording coils according to recording current waveform data, a drive current supply part for supplying a drive current to the spin torque oscillator, and a drive current control part for controlling supply of the drive current by the drive current supply part based on the data. Taking into consideration as an indicator whether a polarity reversal interval included in the data exceeds a threshold time, the drive current control part controls the drive current supply part so as not to substantially lower the quality of signals recorded on the magnetic recording medium.

公开(公告)号：US20140210556A1

公开(公告)日：2014-07-31

申请号：US14150219

申请日：2014-01-08

Applicant: TDK CORPORATION

Inventor： Tomohiko SHIBUYA ,  Atsushi AJIOKA ,  Sadaharu Yoneda ,  Atsushi TSUMITA

IPC: H03F3/193

CPC classification number: H03F3/193 ,  H03F1/0266 ,  H03F2200/408

Abstract: Since a high-frequency signal that is output from a high-frequency oscillator circuit section is detected in a detector circuit and a bias of a negative voltage is supplied from a bias circuit section to the high-frequency amplifier circuit section with a detection voltage that is detected, a negative power supply circuit such as a DC/DC converter or a peripheral circuit is not required, and since a negative bias voltage can be supplied to a high-frequency amplifier circuit, downsizing can be achieved with a low cost.

Abstract translation: 由于在检测器电路中检测到从高频振荡电路部分输出的高频信号，并且从偏置电路部分向高频放大器电路部分提供负电压的偏压，检测电压为 ，则不需要诸如DC / DC转换器或外围电路的负电源电路，并且由于可以向高频放大器电路提供负偏压，因此可以以低成本实现小型化。

公开(公告)号：US12235102B2

公开(公告)日：2025-02-25

申请号：US17768438

申请日：2020-09-18

Applicant: TDK Corporation

Inventor： Tadao Senriuchi ,  Sadaharu Yoneda

IPC: B60C23/06 ,  B60C19/00 ,  B60C23/04 ,  G01B7/16 ,  G01L1/16 ,  G01L17/00 ,  B60C23/20 ,  H01Q1/22

Abstract: Provided is a measuring device capable of enhancing convenience. The measuring device 1 comprises a first sensor 2 provided on a surface of an object 11 to be measured, an elastic body 3 that clamps the first sensor 2 between the elastic body 3 and the object 11 to be measured, a protective sheet 4 provided on the surface of the elastic body 3 on the side of the object 11 to be measured, a case 5 provided on the surface of the elastic body 3 on a side opposite from the object 11 to be measured, and a processing circuit 8 which is provided inside the case 5 and processes an output signal from the first sensor 2. The first sensor 2 is provided between the elastic body 3 and the protective sheet 4. The first sensor 2 is a strain sensor and includes a thin film piezoelectric element. The elastic body 3 is made of foamed rubber.

公开(公告)号：US09530437B2

公开(公告)日：2016-12-27

申请号：US14847716

申请日：2015-09-08

Applicant: TDK CORPORATION

Inventor： Tomohiko Shibuya ,  Atsushi Ajioka ,  Sadaharu Yoneda ,  Atsushi Tsumita

IPC: G11B5/02 ,  G11B5/31 ,  G11B5/48 ,  G11B5/00

CPC classification number: G11B5/02 ,  G11B5/314 ,  G11B5/4853 ,  G11B2005/0024

Abstract: A magnetic head has a magnetic head slider that includes a recording element that generates a recording signal magnetic field, a microwave magnetic field generating element that generates a microwave magnetic field, a terminal electrode, and a first transmission line that interconnects the terminal electrode and the microwave magnetic field generating element. A second transmission line is connected to the terminal electrode, the second transmission line being used to transmit a microwave signal from the outside of the magnetic head slider to the magnetic head slider. A capacitor connected to the first transmission line is provided between the terminal electrode and the microwave magnetic field generating element. Accordingly, in the magnetic head, a microwave signal is efficiently propagated.

Abstract translation: 磁头具有磁头滑动器，其包括产生记录信号磁场的记录元件，产生微波磁场的微波磁场产生元件，端子电极和将端子电极和 微波磁场产生元件。 第二传输线连接到端子电极，第二传输线用于将微波信号从磁头滑块的外部传输到磁头滑块。 连接到第一传输线的电容器设置在端子电极和微波磁场产生元件之间。 因此，在磁头中，有效地传播微波信号。

公开(公告)号：US09252716B2

公开(公告)日：2016-02-02

申请号：US14250118

申请日：2014-04-10

Applicant: TDK CORPORATION

Inventor： Sadaharu Yoneda ,  Atsushi Ajioka ,  Tomohiko Shibuya ,  Atsushi Tsumita

IPC: H03F3/45 ,  H03F1/08 ,  H03F3/19 ,  H03F3/26

CPC classification number: H03F1/083 ,  H03F3/19 ,  H03F3/26 ,  H03F3/45475 ,  H03F3/45928 ,  H03F2200/06 ,  H03F2200/405 ,  H03F2200/451 ,  H03F2200/537

Abstract: A high-frequency amplifier circuit includes a balanced-unbalanced converter converting a single-ended signal into differential signals. The output of a first amplifier amplifying the single-ended signal is connected to the signal terminal on the unbalanced side of the balanced-unbalanced converter. The input of a second amplifier amplifying one of the differential signals is connected to one signal terminal on the balanced side of the balanced-unbalanced converter. The input of a third amplifier amplifying another of the differential signals is connected to another signal terminal on the balanced side of the balanced-unbalanced converter. An impedance element is inserted between an element on the balanced side of the balanced-unbalanced converter and a ground.

Abstract translation: 高频放大器电路包括将单端信号转换成差分信号的平衡不平衡转换器。 放大单端信号的第一放大器的输出连接到平衡不平衡转换器的不平衡侧上的信号端子。 放大其中一个差分信号的第二放大器的输入连接到平衡不平衡转换器的平衡侧上的一个信号端。 放大另一个差分信号的第三放大器的输入连接到平衡不平衡转换器的平衡侧上的另一个信号端子。 阻抗元件插入在平衡不平衡转换器的平衡侧上的元件和地之间。