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. 发明授权

US07795979B2 Automatic gain control circuit and low noise amplifying circuit 有权
标题翻译：自动增益控制电路和低噪声放大电路
公开(公告)号：US07795979B2
公开(公告)日：2010-09-14
申请号：US12298370
申请日：2006-11-29
申请人： Kazuhisa Ishiguro
发明人： Kazuhisa Ishiguro
IPC分类号： H03G3/10
CPC分类号： H03G1/0088 , H03F1/26 , H03F3/195 , H03F3/72 , H03F2200/165 , H03F2200/231 , H03F2200/249 , H03F2200/252 , H03F2200/294 , H03F2200/372 , H03F2203/7233 , H03F2203/7239 , H03G3/3068
摘要： By connecting an antenna damping circuit (4) and a bypass switch (5) in series and connecting the series circuit and an LNA (3) in parallel, it is possible to inhibit a generation of a signal path for connecting the bypass switch (5) to the LNA (3) in series in an operation of the LNA (3) and to prevent a noise factor of the LNA (3) from being deteriorated due to an on resistance of the bypass switch (5).
摘要翻译：通过串联连接天线阻尼电路（4）和旁路开关（5）并联连接串联电路和LNA（3），可以抑制用于连接旁路开关（5）的信号路径的产生）在LNA（3）的操作中与LNA（3）串联，并且防止LNA（3）的噪声因子由于旁路开关（5）的导通电阻而劣化。

2. 发明申请

US20090124225A1 TUNING CIRCUIT AND RADIO RECEIVER USING THE SAME 审中-公开
标题翻译：使用相同的调谐电路和无线电接收器
公开(公告)号：US20090124225A1
公开(公告)日：2009-05-14
申请号：US12267272
申请日：2008-11-07
申请人： Kazuhisa Ishiguro , Yoshiaki Takahashi
发明人： Kazuhisa Ishiguro , Yoshiaki Takahashi
IPC分类号： H04B1/16 , H03H7/01
CPC分类号： H03H7/42 , H03H2007/013
摘要： In a tuning circuit constituted by connecting a coil L and two capacitors C1 and C2 into a π type, a total capacitance value obtained by adding respective capacitance values of an input capacitance Cin and the first capacitor C1 which are connected to one of terminals of a coil L is set to be equal to a capacitance value of the second capacitor C2 connected to the other terminal of the coil L (C2=Cin+C1). Consequently, a capacitance value on one terminal side of the coil L and a capacitance value on the other terminal side are set to be equal to each other and are thus balanced, and a level difference between two output signals on a parallel resonance point of the π type tuning circuit is reduced even if the capacitance values of the two capacitors C1 and C2 are decreased.
摘要翻译：在通过将线圈L和两个电容器C1和C2连接成pi型构成的调谐电路中，通过将输入电容Cin和第一电容器C1的相应电容值相加而获得的总电容值，线圈L被设定为等于连接到线圈L的另一个端子（C2 = Cin + C1）的第二电容器C2的电容值。因此，将线圈L的一个端子侧的电容值和另一方的端子侧的电容值设定为彼此相等，由此平衡，并且在平行谐振点上的两个输出信号之间的电平差即使两个电容器C1和C2的电容值减小，pi型调谐电路也减小。

3. 发明授权

US4864637A FMX stereophonic broadcast receiver 失效
标题翻译： FMX立体声广播接收机
公开(公告)号：US4864637A
公开(公告)日：1989-09-05
申请号：US195106
申请日：1988-05-16
申请人： Tsutomu Ishikawa , Noboru Usui , Kanji Tanaka , Ryuichi Ogawa , Kazuhisa Ishiguro , Masashi Arai
发明人： Tsutomu Ishikawa , Noboru Usui , Kanji Tanaka , Ryuichi Ogawa , Kazuhisa Ishiguro , Masashi Arai
IPC分类号： H04B1/16
CPC分类号： H04B1/1692
摘要： An improved FMX sterophonic broadcast receiver provided with countermeasures against transient noises, which includes a level detection circuit for detecting level of a detected stereo difference signal, and a level control circuit for controlling level of an expanded stereo difference signal according to an output signal of the level detection circuit. By the above arrangement of the present invention, since it is so arranged to cause the level control circuit to function when the degree of modulation becomes large so as to control the level of the stereo difference signal to be low, a level difference is produced between the stereo sum signal and the stereo difference signal for deterioration of the stereo separation degree upon matrixing at a matrix circuit for reduction of noises accordingly.

4. 发明授权

US4852167A FMX stereophonic receiver 失效
标题翻译： FMX立体声接收机
公开(公告)号：US4852167A
公开(公告)日：1989-07-25
申请号：US143805
申请日：1988-01-14
申请人： Noboru Usui , Kanji Tanaka , Ryuichi Ogawa , Tsutomu Ishikawa , Kazuhisa Ishiguro , Masashi Arai
发明人： Noboru Usui , Kanji Tanaka , Ryuichi Ogawa , Tsutomu Ishikawa , Kazuhisa Ishiguro , Masashi Arai
IPC分类号： H03G7/00 , H04B1/16
CPC分类号： H04B1/1692 , H03G7/008
摘要： An FMX stereophonic receiver receives an FMX stereophonic broadcast signal which includes a stereo sum signal, an uncompressed stereo difference signal, and a compressed stereo difference signal which is formed by modulating the uncompressed stereo difference signal by a quadrature modulation and being compressed. The FMX stereophonic receiver includes an FM detector for producing an FM detection signal including a stereo pilot signal, a PLL circuit for producing a signal which is in a synchronized relationship with the stereo pilot signal included in the FM detection signal, a synchronous detection circuit for receiving the FM detection signal and for producing the uncompressed stereo difference signal in accordance with the signal produced from the PLL circuit, a quadrature detection circuit for receiving the FM detection signal and for producing the compressed stereo difference signal in accordance with the signal produced from the PLL circuit, and a phase shifting means for shifting the phase of at least one of the FM detection signal applied to the PLL circuit and the FM detection signal applied to the detection circuits so as to correct the phase difference between the synchronous detection signal and the signal to be detected.

5. 发明授权

US08284876B2 Automatic gain control circuit 失效
标题翻译：自动增益控制电路
公开(公告)号：US08284876B2
公开(公告)日：2012-10-09
申请号：US12298358
申请日：2006-11-29
申请人： Kazuhisa Ishiguro
发明人： Kazuhisa Ishiguro
IPC分类号： H04L27/08 , H04B1/06
CPC分类号： H03G3/3068
摘要： There are provided an A/D converting circuit (10) for converting, into a digital signal, a broadband intermediate frequency signal which is output from a frequency converting circuit (5), and a DSP (11) for generating and outputting control data to control gains of an antenna damping circuit (3) and an LNA (4) based on a level of the broadband digital intermediate frequency signal which is output from the A/D converting circuit (10), and the broadband intermediate frequency signal which is output from the frequency converting circuit (5) is A/D converted and supplied to the DSP (11). Consequently, it is possible to reduce a frequency of a signal input to the A/D converting circuit (10). Thus, it is also possible to reduce a consumed current without requiring the use a special AD converter corresponding to a radio frequency input.
摘要翻译：提供了一种用于将从频率转换电路（5）输出的宽带中频信号转换为数字信号的A / D转换电路（10），以及用于生成并输出控制数据的DSP（11）基于从A / D转换电路（10）输出的宽带数字中频信号的电平，输出天线阻尼电路（3）和LNA（4）的增益，以及输出的宽带中频信号从频率转换电路（5）进行A / D转换并提供给DSP（11）。因此，可以降低输入到A / D转换电路（10）的信号的频率。因此，也可以在不需要使用与射频输入对应的专用AD转换器的情况下减少消耗电流。

6. 发明申请

US20090310723A1 AUTOMATIC GAIN CONTROL CIRCUIT 审中-公开
标题翻译：自动增益控制电路
公开(公告)号：US20090310723A1
公开(公告)日：2009-12-17
申请号：US12306687
申请日：2007-02-06
申请人： Kazuhisa Ishiguro
发明人： Kazuhisa Ishiguro
IPC分类号： H04L27/08
CPC分类号： H03G3/3052 , H04B1/109
摘要： Circuits (an AGC amplifier 8 and a second A/D converting circuit 9) for detecting an antenna level of a disturbing wave are provided on an output of a frequency converting circuit 4, and levels of antenna ends of a desirable wave and the disturbing wave are calculated by a DSP 10 and a gain of an antenna damping circuit 2, an LNA 3 or the frequency converting circuit 4 is adjusted corresponding to the respective levels, thereby enabling an optimum gain distribution for an RF stage to be set corresponding to the levels of the desirable wave and the disturbing wave.
摘要翻译：用于检测干扰波的天线电平的电路（AGC放大器8和第二A / D转换电路9）设置在频率转换电路4的输出端上，并且期望的波和干扰波的天线端的电平由DSP 10和天线阻尼电路2的增益计算，LNA 3或频率转换电路4根据各个电平进行调节，从而能够根据电平设定RF级的最佳增益分布的理想波和干扰波。

7. 发明申请

US20090207952A1 AUTOMATIC GAIN CONTROL CIRCUIT 失效
标题翻译：自动增益控制电路
公开(公告)号：US20090207952A1
公开(公告)日：2009-08-20
申请号：US12298358
申请日：2006-11-29
申请人： Kazuhisa Ishiguro
发明人： Kazuhisa Ishiguro
IPC分类号： H04L27/08
CPC分类号： H03G3/3068
摘要： There are provided an A/D converting circuit (10) for converting, into a digital signal, a broadband intermediate frequency signal which is output from a frequency converting circuit (5), and a DSP (11) for generating and outputting control data to control gains of an antenna damping circuit (3) and an LNA (4) based on a level of the broadband digital intermediate frequency signal which is output from the A/D converting circuit (10), and the broadband intermediate frequency signal which is output from the frequency converting circuit (5) is A/D converted and supplied to the DSP (11). Consequently, it is possible to reduce a frequency of a signal input to the A/D converting circuit (10). Thus, it is also possible to reduce a consumed current without requiring the use a special AD converter corresponding to a radio frequency input.
摘要翻译：提供了一种用于将从频率转换电路（5）输出的宽带中频信号转换为数字信号的A / D转换电路（10），以及用于生成并输出控制数据的DSP（11）基于从A / D转换电路（10）输出的宽带数字中频信号的电平，输出天线阻尼电路（3）和LNA（4）的增益，以及输出的宽带中频信号从频率转换电路（5）进行A / D转换并提供给DSP（11）。因此，可以降低输入到A / D转换电路（10）的信号的频率。因此，也可以在不需要使用与射频输入对应的专用AD转换器的情况下减少消耗电流。

8. 发明申请

US20090115519A1 POWER AMPLIFIER AND ITS IDLING CURRENT SETTING CIRCUIT 失效
标题翻译：功率放大器及其定义电流设置电路
公开(公告)号：US20090115519A1
公开(公告)日：2009-05-07
申请号：US12092523
申请日：2006-07-12
申请人： Kazuhisa Ishiguro
发明人： Kazuhisa Ishiguro
IPC分类号： H03F3/45
CPC分类号： H03F1/0261 , H03F1/308 , H03F3/301 , H03F3/3022 , H03F3/303 , H03F3/45183 , H03F3/45475 , H03F2203/30061 , H03F2203/45596 , H03F2203/45726
摘要： An idling current setting circuit (3) includes: current setting transistors (Q3, Q4) connected to output transistors (Q1, Q2) in a driver (2) in current mirror form; a plurality of current setting resistors (R1 to R4); and a plurality of switches (ASW1 to ASW4) for switching to any of the current setting resistors (R1 to R4). This enables the idling current to be set by the current mirror ratio between the current setting transistors (Q3, Q4) having no connection with the open gain of the power amplifier and the output transistors (Q1, Q2), so that the idling current can be arbitrarily set independently of the open gain.
摘要翻译：怠速电流设定电路（3）包括：以电流镜面形式连接到驱动器（2）中的输出晶体管（Q1，Q2）的电流设定晶体管（Q3，Q4）多个电流设定电阻（R1〜R4）; 以及用于切换到任何电流设定电阻器（R1〜R4）的多个开关（ASW1〜ASW4）。这使得能够通过与功率放大器和输出晶体管（Q1，Q2）的开放增益无关的电流设定晶体管（Q3，Q4）之间的电流镜比来设定怠速电流，使得空转电流可以可以独立于开放增益任意设置。

9. 发明申请

US20080090538A1 AUTOMATIC GAIN CONTROL APPARATUS 有权
标题翻译：自动增益控制装置
公开(公告)号：US20080090538A1
公开(公告)日：2008-04-17
申请号：US11925506
申请日：2007-10-26
申请人： Kazuhisa Ishiguro
发明人： Kazuhisa Ishiguro
IPC分类号： H04B1/06
CPC分类号： H04B1/109 , H03G1/0088 , H03G3/3052
摘要： An arbitrary threshold value (Ei0) is established which defines a boundary as to activating an RF-AGC circuit (21) if the value of the field intensity (Ei) of a received signal is greater than what value while the value of the field intensity of a signal at a desired frequency being a predetermined value (Ei0) in a weak field area. The established value (Ei0) is used to provide a threshold value establishing/controlling part (22) that controls the ON/OFF of the operation of the RF-AGC circuit (21). In this way, a set maker or the like of an IC including an automatic gain control part (11) can perform a field test or the like such that a preferable value obtained by a result of the field test or the like can be used as an AGC start level (Ei0), whereby an optimum AGC control can be performed based on the preferable AGC start level (Ei0).
摘要翻译：建立任意的阈值（Ei 0），如果接收信号的场强（Ei）的值大于所述场的值，则定义激活RF-AGC电路（21）的边界，期望频率处的信号的强度是弱磁场区域中的预定值（Ei 0）。建立的值（Ei 0）用于提供控制RF-AGC电路（21）的操作的ON / OFF的阈值建立/控制部分（22）。以这种方式，包括自动增益控制部分（11）的IC的集合制造商等可以执行现场测试等，使得可以使用通过现场测试等的结果获得的优选值作为 AGC起始电平（Ei 0），从而可以基于优选的AGC起始电平（Ei 0）来执行最佳AGC控制。

10. 发明申请

US20070170988A1 AUTOMATIC POWER OUTPUT CONTROL CIRCUIT 有权
标题翻译：自动电源输出控制电路
公开(公告)号：US20070170988A1
公开(公告)日：2007-07-26
申请号：US11619306
申请日：2007-01-03
申请人： Kazuhisa Ishiguro
发明人： Kazuhisa Ishiguro
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F1/02 , H03F3/3022 , H03F3/45192 , H03F2203/30015 , H03F2203/45594 , H03F2203/45726 , H03G3/3042
摘要： This invention includes a gain control section 13 capable of changing an APC loop gain according to a power output level set in a power amplifier to allow suppression of variation in power output level when the power output level is low and suppression of occurrence of ringing when the power output level is high by making the loop gain high when the power output level is low and making the loop gain low when the power output level is high.
摘要翻译：本发明包括增益控制部分13，其能够根据在功率放大器中设置的功率输出电平来改变APC环路增益，以允许当功率输出电平低时抑制功率输出电平的变化，并且当当功率输出电平低时，抑制发生振铃当功率输出电平为低电平使环路增益为低电平时，通过使环路增益为高电平，电源输出电平变高。

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