公开(公告)号：US4369414A

公开(公告)日：1983-01-18

申请号：US212100

申请日：1980-12-02

Applicant: Kazuharu Aoki ,  Sadao Igarashi

Inventor： Kazuharu Aoki ,  Sadao Igarashi

IPC: H03G1/00 ,  H03G3/02 ,  H03G3/10 ,  H03H7/25 ,  H03H7/46 ,  H03K17/76 ,  H04B1/18 ,  H04N5/44 ,  H03H7/24

CPC classification number: H03H11/24 ,  H03G1/0058 ,  H03H7/255 ,  H03H7/46

Abstract: A high-frequency input circuit for two inputs has a pair of first and second pi variable attenuation circuits each composed of three P-I-N diodes, some of which are shared by both of the circuits. The P-I-N diodes serve as attenuator elements in the attenuation circuits and also as switching elements for switching between the first and second attenuation circuits.

Abstract translation: 用于两个输入的高频输入电路具有一对第一和第二可变衰减电路，每个由三个P-I-N二极管构成，其中一些由两个电路共用。 P-I-N二极管用作衰减电路中的衰减器元件，并且还用作用于在第一和第二衰减电路之间切换的开关元件。

公开(公告)号：US06965759B2

公开(公告)日：2005-11-15

申请号：US09948833

申请日：2001-09-06

Applicant: Kazuharu Aoki

Inventor： Kazuharu Aoki

IPC: H03D7/18 ,  H03B21/00 ,  H03B21/02 ,  H03L7/08 ,  H03L7/099 ,  H03L7/16 ,  H03L7/22 ,  H04B1/40 ,  H04B1/18

CPC classification number: H03L7/22 ,  H03B21/02 ,  H04B1/406

Abstract: A frequency synthesizer includes a first oscillator that outputs a first oscillation signal. A first phase shifter outputs two first signals which are out of phase by 90°. A second oscillator outputs a second oscillation signal. A second phase shifter outputs two second signals which are out of phase by 90°. To a first mixer, one of the first signals and one of the second signals are input. To a second mixer, the other one of the first signals and the other one of the second signals are input. An adder adds combined outputs from the first and second mixers. A phase switching device changes the phase relationship between the two first signals or the two second signals input to the first mixer and the second signal. An input allowing/prohibiting switching device allows or prohibits the second signals from being input to the first and second mixers. The adder outputs one of a signal at the same frequency as that of the first oscillation signal, a signal at the sum frequency of the frequencies of the first oscillation signal and the second oscillation signal, and a signal at the difference frequency between the frequencies of the first oscillation signal and the second oscillation signal.

Abstract translation: 频率合成器包括输出第一振荡信号的第一振荡器。 第一移相器输出异相90°的两个第一信号。 第二振荡器输出第二振荡信号。 第二移相器输出两相异相90度的信号。 对于第一混频器，输入第一信号和第二信号之一。 向第二混频器输入第一信号中的另一个和第二信号中的另一个信号。 加法器将来自第一和第二混频器的组合输出相加。 相位切换装置改变输入到第一混频器的两个第一信号或两个第二信号之间的相位关系和第二信号。 输入允许/禁止开关装置允许或禁止第二信号被输入到第一和第二混频器。 加法器输出与第一振荡信号相同频率的信号中的一个信号，第一振荡信号和第二振荡信号的频率的和频的信号，以及在频率之间的差频 第一振荡信号和第二振荡信号。

公开(公告)号：US06608502B2

公开(公告)日：2003-08-19

申请号：US10124129

申请日：2002-04-17

Applicant: Kazuharu Aoki ,  Jiro Kikuchi

Inventor： Kazuharu Aoki ,  Jiro Kikuchi

IPC: G01R1900

CPC classification number: H03D1/10

Abstract: A transmission signal which is output from a power amplifier is rectified by a first rectifying circuit and is then input to a first transistor of a voltage-to-current converting circuit, while the reference voltage is output from a second rectifying circuit and is then input to a second transistor of the voltage-to-current converting circuit. The output current of the first transistor is subtracted from the output current of the second transistor via a first current-mirror circuit, and a current that is proportional to the output voltage of the power amplifier is caused to flow to a two-terminal p-n junction electronic device. Then, a voltage that is proportional to the logarithm of the current is output from across the p-n junction electronic device.

Abstract translation: 从功率放大器输出的发送信号由第一整流电路整流，然后被输入到电压 - 电流转换电路的第一晶体管，同时参考电压从第二整流电路输出，然后被输入 到电压 - 电流转换电路的第二晶体管。 通过第一电流镜电路从第二晶体管的输出电流中减去第一晶体管的输出电流，并且使得与功率放大器的输出电压成比例的电流流向两端pn结 电子设备。 然后，从p-n结电子器件的两端输出与电流的对数成比例的电压。

公开(公告)号：US6114921A

公开(公告)日：2000-09-05

申请号：US133903

申请日：1998-08-13

Applicant: Kazuharu Aoki

Inventor： Kazuharu Aoki

IPC: H03C1/54 ,  H04L27/20

CPC classification number: H03C1/545 ,  H03C2200/0058 ,  H03C2200/0066 ,  H03D2200/0043

Abstract: A double-balanced modulator in which the bias voltages do not become different by a buffer amplifier or the like connected to the front stage and a carrier wave is not leaked is provided. This modulator comprises a pair of input terminals 2, 3, a pair of preamplifiers 4 for amplifying balance signals supplied to the input terminals 2 and 3, and a double-balanced differential amplifier 23 to which balance carrier signals are supplied and which further amplifies the balance signals that have been amplified by the pair of preamplifiers 4, wherein capacitors 12 are connected in series between the base of a first transistor 7 and one of the input terminals 2, 3 and between the base of a second transistor 8 and the other one of the input terminals 2, 3, respectively.

Abstract translation: 提供了一种双平衡调制器，其中通过连接到前级的缓冲放大器等不使偏置电压变得不同，并且提供载波不泄漏的双平衡调制器。 该调制器包括一对输入端子2,3，用于放大提供给输入端子2和3的平衡信号的一对前置放大器4，以及双平衡差分放大器23，平衡载波信号被提供给双平衡差分放大器23，并进一步放大 由一对前置放大器4放大的平衡信号，其中电容器12串联连接在第一晶体管7的基极和输入端子2,3中的一个之间以及第二晶体管8的基极之间，另一个 的输入端子2,3。

公开(公告)号：US4581768A

公开(公告)日：1986-04-08

申请号：US605595

申请日：1984-04-30

Applicant: Kazuharu Aoki ,  Masahiko Saito

Inventor： Kazuharu Aoki ,  Masahiko Saito

IPC: H04B1/26 ,  H03D7/12 ,  H03G3/30 ,  H03J5/24

CPC classification number: H03J5/244 ,  H03D7/125 ,  H03G3/3052

Abstract: In a VHF tuner, feedback capacitance between the emitter of a local oscillating transistor and the ground in a local oscillator is changed at the low band receiving state and high band receiving state by controlling a switching diode connected in series to a capacitor for feedback capacitance and, a mixer is installed to mix the output of the local oscillator and high frequency input. For an improved mixer biasing circuit, the switching diode in series connection to the capacitor for feedback capacitance is connected to one terminal of a mixing FET in the mixer, and changing of the feedback capacitance in the local oscillator is accompanied by changing of working current of the mixing FET in the local oscillator.

Abstract translation: 在VHF调谐器中，本地振荡晶体管的发射极与本地振荡器的地之间的反馈电容通过控制与用于反馈电容的电容器串联连接的开关二极管而在低频带接收状态和高频带接收状态下变化， ，安装了混频器来混合本地振荡器的输出和高频输入。 对于改进的混频器偏置电路，串联连接到用于反馈电容的电容器的开关二极管连接到混频器中的混合FET的一个端子，并且本地振荡器中的反馈电容的变化伴随着工作电流的变化 在本地振荡器中混合FET。

公开(公告)号：US20100301983A1

公开(公告)日：2010-12-02

申请号：US12780537

申请日：2010-05-14

Applicant: Toshiro Furuta ,  Yuji Sakuma ,  Toshiyuki Yamada ,  Kazuharu Aoki

Inventor： Toshiro Furuta ,  Yuji Sakuma ,  Toshiyuki Yamada ,  Kazuharu Aoki

IPC: H01F27/28 ,  H01F27/29

CPC classification number: H01F27/292 ,  H01F17/02

Abstract: A surface-mount air-core coil is provided in which a conductive wire covered with an insulation coating is wound into a spiral shape to form a cylindrically wound coil portion, conductive wires which are not covered with the insulation coating extend from both ends of the wound coil portion to form a pair of terminal portions, and the terminal portions are soldered onto electrode lands of a circuit board. A lower side of the wound coil portion which faces the circuit board is curved, an upper side thereof is formed in a flat shape, and the curved part is mounted on the circuit board.

Abstract translation: 提供了一种表面贴装空心线圈，其中覆盖有绝缘涂层的导线缠绕成螺旋形状以形成圆筒形缠绕的线圈部分，未被绝缘涂层覆盖的导线从两端延伸 卷绕线圈部分形成一对端子部分，并且端子部分焊接到电路板的电极焊盘上。 绕线圈部分的面向电路板的下侧是弯曲的，其上侧形成为平坦的形状，并且弯曲部分安装在电路板上。

公开(公告)号：US5926749A

公开(公告)日：1999-07-20

申请号：US818403

申请日：1997-03-12

Applicant: Sadao Igarashi ,  Kazuharu Aoki ,  Satoshi Urabe

Inventor： Sadao Igarashi ,  Kazuharu Aoki ,  Satoshi Urabe

IPC: H03G3/20 ,  H03F1/32 ,  H03G3/10 ,  H03G3/30 ,  H04B1/04 ,  H04B1/06

CPC classification number: H03G3/3042 ,  H04B1/04

Abstract: An amplifier circuit comprises current-variable mode variable amplifying circuits and for amplifying an IF signal and a current-constant mode variable amplifying circuit for amplifying an RF signal. I and Q signals are applied to the IF-stage variable amplifying circuits and corresponding to two stages through a QPSK modulating circuit and amplified based on an AGC voltage VAGC applied thereto. The IF signal is converted into the RF signal by a mixer, which in turn is applied to the RF-stage variable amplifying circuit where it is amplified based on the AGC voltage VAGC common to the IF stages. The linearly-varied AGC voltage VAGC is converted into an exponentially-varied control current by transistors. Thus, a gain PG �dB! of each of variable amplifying circuits is controlled linearly with the AGC voltage VAGC.

Abstract translation: 放大器电路包括电流可变模式可变放大电路和放大IF信号以及用于放大RF信号的电流常数模式可变放大电路。 I和Q信号通过QPSK调制电路施加到IF级可变放大电路并对应于两级，并基于施加到其上的AGC电压VAGC进行放大。 IF信号通过混频器转换成RF信号，该混频器又被施加到RF级可变放大电路，在RF级可变放大电路中基于IF级公共的AGC电压VAGC进行放大。 线性变化的AGC电压VAGC被晶体管转换成指数变化的控制电流。 因此，每个可变放大电路的增益PG [dB]由AGC电压VAGC线性地控制。

公开(公告)号：US5900782A

公开(公告)日：1999-05-04

申请号：US843498

申请日：1997-04-16

Applicant: Sadao Igarashi ,  Kazuharu Aoki ,  Satoshi Urabe

Inventor： Sadao Igarashi ,  Kazuharu Aoki ,  Satoshi Urabe

IPC: H03G3/20 ,  H03F1/30 ,  H03F3/45 ,  H03G1/04 ,  H03G3/02 ,  H03G3/10 ,  H03G3/30

CPC classification number: H03F1/302 ,  H03G1/04 ,  H03F2200/372

Abstract: An object of the present invention is to provide an AGC voltage correction circuit unaffected by a change in temperature.Since base-emitter voltages V.sub.BE of transistors Q9 and Q10 constituting a first reference current source 7 have temperature dependency, the variations of the gains of amplification transistors Q17 and Q18 dependent on temperature are diminished. Since transistors Q1 and Q2 constituting a second reference current source 2 have temperature dependency, a gain slope concerning amplification transistors Q17 and Q18 relative to temperature is corrected linearly.

Abstract translation: 本发明的目的是提供不受温度变化影响的AGC电压校正电路。 由于构成第一参考电流源7的晶体管Q9和Q10的基极 - 发射极电压VBE具有温度依赖性，所以依赖于温度的放大晶体管Q17和Q18的增益的变化减小。 由于构成第二参考电流源2的晶体管Q1和Q2具有温度依赖性，所以关于放大晶体管Q17和Q18相对于温度的增益斜率被线性校正。

公开(公告)号：US5471654A

公开(公告)日：1995-11-28

申请号：US246585

申请日：1994-05-20

Applicant: Mitsunari Okazaki ,  Kazuharu Aoki

Inventor： Mitsunari Okazaki ,  Kazuharu Aoki

IPC: H04B1/04 ,  H03G1/04 ,  H03G3/30 ,  H04B1/40 ,  H04B7/005 ,  H04B1/00

CPC classification number: H04W52/52 ,  H03G1/04 ,  H03G3/3052 ,  H04B1/40

Abstract: A transmitting/receiving unit capable of setting the level of power for transmitting an output frequency signal, which correctly correspond to the level of a received frequency signal, without dependency upon change in the environmental temperature, the transmitting/receiving unit including a signal transmitting portion; and a signal receiving portion so as to be capable of generating an output signal, the level of which depends upon the level of a received signal, wherein the signal transmitting portion includes first variable-gain amplifying means having an amplified gain which is varied by first AGC voltage, the signal receiving portion includes second variable-gain amplifying means having an amplified gain which is varied by second AGC voltage, wave-detection means for generating DC voltage which is in proportion to level of an output signal from the second variable-gain amplifying means, and temperature-dependent-type automatic gain control voltage generating means for converting the DC voltage into AGC voltage which depends upon change in environmental temperature, wherein the AGC voltages are used to compensate temperature change of the gain so that the level of the output signal is made to be constant to correspond to the level of the received signal regardless of change in the environmental temperature.

Abstract translation: 发送/接收单元，能够根据接收到的频率信号的电平设定用于发送输出频率信号的功率电平，而不依赖于环境温度的变化，发送/接收单元包括信号发送部分 ; 以及信号接收部分，以便能够产生其电平取决于接收信号的电平的输出信号，其中信号发送部分包括具有放大增益的第一可变增益放大装置，该放大增益首先变化 AGC电压，信号接收部分包括具有由第二AGC电压变化的放大增益的第二可变增益放大装置，用于产生与来自第二可变增益的输出信号的电平成比例的DC电压的波检测装置 放大装置和温度依赖型自动增益控制电压发生装置，用于将DC电压转换成取决于环境温度变化的AGC电压，其中AGC电压用于补偿增益的温度变化， 使得输出信号是恒定的，以对应于接收信号的电平，而不考虑环境变化 温度

公开(公告)号：US5327097A

公开(公告)日：1994-07-05

申请号：US6336

申请日：1993-01-19

Applicant: Sadao Igarashi ,  Kazuharu Aoki

Inventor： Sadao Igarashi ,  Kazuharu Aoki

IPC: H03F1/02 ,  H03F1/32 ,  H03G1/00 ,  H03G3/10 ,  H03G3/30 ,  H03F3/45

CPC classification number: H03G1/0023 ,  H03G3/3052

Abstract: There is provided a gain control circuit which comprises a circuit unit composed of a transistor Q.sub.11, a first gain control unit 12 including transistors Q.sub.12 and Q.sub.13 having emitters connected to each other and a choke coil L.sub.1 having an end connected to the collector of the transistor Q.sub.12 and the other end connected to the collector of the transistor Q.sub.13 for checking a high frequency signal current, and a second gain control unit 15 including transistors Q.sub.14 and Q.sub.15 having emitters connected to each other. Then, the transistor Q.sub.11 of the circuit unit is connected to the node where the emitters of the first gain control unit 12 are connected to each other and the node where the transistor Q.sub.13 of the first gain control unit 12 is connected to the choke coil L.sub.1 is connected to the node where the emitters of the second gain control unit 15 are connected to each other, and a high frequency is input to the base of the transistor Q.sub.11 of the circuit unit. With this arrangement, a power consumption is reduced and the distortion of an output signal is improved.

Abstract translation: 提供了一种增益控制电路，其包括由晶体管Q11构成的电路单元，包括具有彼此连接的发射极的晶体管Q12和Q13的第一增益控制单元12和具有连接到晶体管的集电极的端部的扼流线圈L1 Q12，另一端连接到晶体管Q13的集电极，用于检查高频信号电流，第二增益控制单元15包括具有彼此连接的发射极的晶体管Q14和Q15。 然后，电路单元的晶体管Q11连接到第一增益控制单元12的发射极彼此连接的节点，并且第一增益控制单元12的晶体管Q13连接到扼流圈L1 连接到第二增益控制单元15的发射极彼此连接的节点，并且高频被输入到电路单元的晶体管Q11的基极。 利用这种布置，功耗降低，输出信号的失真得到改善。