知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

13 条记录 (耗时 0.013 秒)

    Microwave oscillating circuit and remotely controllable “Kotatsu” using the same
    1.
    发明授权
    Microwave oscillating circuit and remotely controllable “Kotatsu” using the same 失效
    微波振荡电路和远程可控“Kotatsu”使用相同

    公开(公告)号：US06252470B1

    公开(公告)日：2001-06-26

    申请号：US09451318

    申请日：1999-11-30

    申请人： Kazuaki Togawa

    发明人： Kazuaki Togawa

    IPC分类号： H03B518

    CPC分类号： H03B5/1847 ,  H03B2201/011 ,  H03B2201/0208 ,  H03B2201/0225

    摘要： An oscillating circuit adjusts its oscillating frequency through the following method. A tip-open type strip-line stub coupled to the base terminal of the transistor. An electrical length of the stub is changed by an adjusting mechanism such as coupling the stub with conductive small lands provided near the stub tip by a chip resistor. A “kotatsu” employs a remote controller including this oscillating circuit.

    摘要翻译： 振荡电路通过以下方法调整振荡频率。 耦合到晶体管的基极的尖端开放型带状线短路。 短截线的电长度通过调节机构改变，例如通过芯片电阻器将短截线与短截线附近提供的导电小平台连接。 “kotatsu”采用包括该振荡电路的遥控器。

    Controlled loop gain YIG tuned oscillator circuit
    4.
    发明授权
    Controlled loop gain YIG tuned oscillator circuit 失效
    控制环路增益YIG调谐振荡电路

    公开(公告)号：US5894248A

    公开(公告)日：1999-04-13

    申请号：US872743

    申请日：1997-06-11

    申请人： Alden Bedard

    发明人： Alden Bedard

    IPC分类号： H03B1/00 ,  H03B5/18

    CPC分类号： H03B5/1888 ,  H03B2200/0062 ,  H03B2200/0066 ,  H03B2200/0094 ,  H03B2201/0216 ,  H03B2201/0225

    摘要： A YIG oscillator circuit including a closed loop control system which maximizes loop gain during start-up and minimizes loop gain after start-up to minimize gain compression. In one embodiment the closed loop control circuit includes a PIN diode coupled between the collector and base of a BJT, and comparison circuitry for comparing the YIG oscillator output voltage level with a reference voltage and providing a resulting feedback current to the PIN diode at the collector of the BJT. In operation, during start-up when the output voltage of the YIG oscillator is less than the reference voltage, the feedback current will be minimal and the PIN diode will reverse bias to maximize loop gain. When the output voltage approaches the reference voltage level, the feedback current will increase to forward bias the PIN diode to reduce loop gain and minimize gain compression. In a second embodiment, the PIN diode is not included, and the closed loop control circuit output signal is coupled to the emitter of the BJT. In operation with the second embodiment, during start-up current provided to the emitter of the BJT will be at a maximum and the BJT reflection coefficient will be unaffected to maximize loop gain. When operation approaches steady-state, feedback current will decrease current to the emitter of the BJT to reduce the reflection coefficient of the BJT and thus reduce overall loop gain.

    摘要翻译： YIG振荡器电路包括一个闭环控制系统，可使启动期间的环路增益最大化，并使启动后的环路增益最小化，以最小化增益压缩。 在一个实施例中，闭环控制电路包括耦合在BJT的集电极和基极之间的PIN二极管和用于将YIG振荡器输出电压电平与参考电压进行比较并将所得到的反馈电流提供给集电极上的PIN二极管的比较电路 的BJT。 在运行中，当YIG振荡器的输出电压小于参考电压时，在启动期间，反馈电流将最小，并且PIN二极管将反向偏置以使环路增益最大化。 当输出电压接近参考电压电平时，反馈电流将增加以使PIN二极管正向偏置，以减少环路增益并最小化增益压缩。 在第二实施例中，不包括PIN二极管，并且闭环控制电路输出信号耦合到BJT的发射极。 在第二实施例的操作中，在启动期间，提供给BJT的发射极的电流将处于最大值，并且BJT反射系数将不受影响以使环路增益最大化。 当操作接近稳态时，反馈电流将减小BJT发射极的电流，以降低BJT的反射系数，从而降低总体环路增益。

    High frequency circuit device with stripline having an adjustable attachment position for varactor diode terminal
    5.
    发明授权
    High frequency circuit device with stripline having an adjustable attachment position for varactor diode terminal 失效
    带状线的高频电路器件具有用于变容二极管端子的可调连接位置

    公开(公告)号：US5708397A

    公开(公告)日：1998-01-13

    申请号：US669837

    申请日：1996-06-26

    申请人： Nagahisa Furutani ,  Tsuneyuki Tanaka

    发明人： Nagahisa Furutani ,  Tsuneyuki Tanaka

    IPC分类号： H03B5/12 ,  H01P1/185 ,  H03B1/00 ,  H03B5/18

    CPC分类号： H03B5/1852 ,  H01P1/185 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2924/19041 ,  H01L2924/3011 ,  H03B2201/0208 ,  H03B2201/0225

    摘要： A high-frequency circuit device includes a varactor diode having a first terminal and a second terminal, a first strip line connected to the first terminal of the varactor diode, a voltage being applied to the varactor diode via the first terminal, a second strip line having a first end connected to the second terminal of the varactor diode, and a second open end. The second strip line has a length so as to obtain an equivalent strip line length taking into capacitances of the varactor diode and the second strip line. The equivalent strip line length determines a characteristic of the high-frequency circuit device.

    摘要翻译： 高频电路装置包括具有第一端子和第二端子的变容二极管，连接到变容二极管的第一端子的第一带状线，经由第一端子施加到变容二极管的电压，第二带状线 具有连接到变容二极管的第二端子的第一端和第二开口端。 第二带状线具有长度，以获得占据变容二极管和第二带状线的电容的等效带状线长度。 等效带线长度决定了高频电路装置的特性。

    Microwave mixing circuit and a VHF-UHF tuner having the mixing circuit
    6.
    发明授权
    Microwave mixing circuit and a VHF-UHF tuner having the mixing circuit 失效
    微波混合电路和具有混合电路的VHF-UHF调谐器

    公开(公告)号：US4340975A

    公开(公告)日：1982-07-20

    申请号：US195314

    申请日：1980-10-08

    申请人： Hiroshi Onishi ,  Sadahiko Yamashita

    发明人： Hiroshi Onishi ,  Sadahiko Yamashita

    IPC分类号： H03B1/00 ,  H03B5/18 ,  H03D7/14 ,  H03D7/16 ,  H03D9/06 ,  H03D7/02 ,  H04B1/26 ,  H04N5/44

    CPC分类号： H03D7/161 ,  H03D9/0633 ,  H03B2201/0208 ,  H03B2201/0225 ,  H03B5/1823 ,  H03D2200/0017 ,  H03D2200/0027 ,  H03D7/1408

    摘要： In a double superheterodyne tuner for receiving TV channel signals, a frequency in a range defined between 2520 and 2700 MHz is selected as the first intermediate frequency, while the first intermediate frequency is obtained by subtracting a desired channel frequency from a first local oscillator frequency. The tuner comprises first and second mixing circuits respectively used for effecting frequency conversion, where each of these mixing circuits has parallel coupled lines so that each mixing circuit operates as a balance-to-unbalance transformer. The second mixing circuit further comprises a short-circuit line placed between the parallel coupled lines. The tuner also comprises a band pass filter having a band width less than 5 MHz, which selectively transmits the first intermediate frequency signal from the first mixing circuit.

    摘要翻译： 在用于接收TV信道信号的双重超外差调谐器中，选择在2520和2700MHz之间的范围内的频率作为第一中频，而通过从第一本机振荡器频率减去所需信道频率获得第一中频。 调谐器包括分别用于实现频率转换的第一和第二混频电路，其中这些混频电路中的每一个具有并联耦合线，使得每个混频电路作为平衡不平衡变压器工作。 第二混合电路还包括放置在并联耦合线之间的短路线。 调谐器还包括带宽小于5MHz的带通滤波器，其选择性地传输来自第一混频电路的第一中频信号。

    Microwave oscillator having at least one adjustment pin
    7.
    发明授权
    Microwave oscillator having at least one adjustment pin 失效
    微波振荡器具有至少一个调整引脚

    公开(公告)号：US6005450A

    公开(公告)日：1999-12-21

    申请号：US29093

    申请日：1998-02-18

    申请人： Ewald Schmidt ,  Bernhard Lucas

    发明人： Ewald Schmidt ,  Bernhard Lucas

    IPC分类号： H03B1/00 ,  H03B9/14 ,  H03B7/14

    CPC分类号： H03B9/14 ,  H03B2201/0225

    摘要： A microwave oscillator includes a waveguide that is short-circuited on one side and a diode arranged therein, which receives its supply voltage by way of a coupling pin passed through a waveguide wall. At least one adjustment pin, extends into the waveguide and is adjustable in its penetration depth, for tuning the oscillator frequency. Because the adjustment pin is aligned at an acute angle to the coupling pin, the oscillator frequency can be tuned very precisely.

    摘要翻译： PCT No.PCT / DE97 / 00036 Sec。 371日期1998年2月18日 102（e）1998年2月18日PCT 1997年1月13日PCT PCT。 公开号WO98 / 00904 日期1998年1月8日微波振荡器包括在一侧短路并布置在其中的二极管的波导，其通过穿过波导壁的耦合引脚接收其电源电压。 至少一个调节销延伸到波导中，并且可调节其穿透深度，用于调谐振荡器频率。 由于调节引脚与耦合引脚成锐角对准，所以可以非常精确地调节振荡器频率。

    High-frequency voltage controlled oscillator
    9.
    发明授权
    High-frequency voltage controlled oscillator 失效
    高频压控振荡器

    公开(公告)号：US5982244A

    公开(公告)日：1999-11-09

    申请号：US176287

    申请日：1993-12-30

    申请人： Hirotaka Fujisaki

    发明人： Hirotaka Fujisaki

    IPC分类号： H01P7/08 ,  H03B1/00 ,  H03B5/18

    CPC分类号： H01P7/082 ,  H03B5/1847 ,  H03B2200/004 ,  H03B2201/014 ,  H03B2201/0208 ,  H03B2201/0225

    摘要： A voltage controlled oscillator provides a trimming stub (3) for adjusting a free-running frequency in parallel to a microstrip line resonator (4). This arrangement makes it possible to easily perform fine adjustment of a free-running frequency used in the voltage controlled oscillator capable of supplying 2 GHz or higher oscillating frequency.

    摘要翻译： 压控振荡器提供用于调节与微带线谐振器（4）并联的自由运行频率的微调短截线（3）。 这种布置使得可以容易地执行能够提供2GHz或更高的振荡频率的压控振荡器中使用的自由运行频率的微调。

    Receiver circuit for a mobile communications system
    10.
    发明授权
    Receiver circuit for a mobile communications system 失效
    用于移动通信系统的接收机电路

    公开(公告)号：US5946358A

    公开(公告)日：1999-08-31

    申请号：US951519

    申请日：1997-10-16

    申请人： Masashi Horimoto

    发明人： Masashi Horimoto

    IPC分类号： H04J3/06 ,  H03B1/00 ,  H03L7/099 ,  H04B7/26 ,  H04L7/033 ,  H04L7/04 ,  H04L7/08 ,  H03K9/00 ,  H03D1/00 ,  H04B1/18 ,  H04L27/06

    CPC分类号： H04L7/042 ,  H03L7/0992 ,  H04L7/0331 ,  H03B2201/0225

    摘要： A PHS relay station demodulates a digital signal from a received radio-frequency signal by use of a reproduction clock produced from the digital signal. The relay station has an oscillator which generates a clock and a variable-ratio frequency divider for the clock outputted from the oscillator. A bit clock is produced from the output of the divider. A signal processor processes the digital signal by use of the bit clock. A detector detects a specific code in the digital signal in synchronism with the bit clock. The length of time that passes after the specific code detection signal is generated until the reproduction clock changes its level is detected as the phase deviation between the reproduction clock and the bit clock. The phase deviation is eliminated by temporarily changing the frequency division ratio of the divider in accordance with the amount of the deviation.

    摘要翻译： PHS中继站通过使用从数字信号产生的再现时钟解调来自接收的射频信号的数字信号。 中继站具有一个振荡器，该振荡器为从振荡器输出的时钟产生时钟和可变比分频器。 从分频器的输出产生一个位时钟。 信号处理器通过使用位时钟处理数字信号。 检测器与位时钟同步地检测数字信号中的特定码。 检测在再生时钟改变其电平之后产生特定代码检测信号之后经过的时间长度，作为再现时钟和位时钟之间的相位偏差。 通过根据偏差量临时改变分频器的分频比来消除相位偏差。