公开(公告)号：US5914986A

公开(公告)日：1999-06-22

申请号：US682717

申请日：1996-07-29

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

IPC分类号： H03D1/22 ,  H03D7/16 ,  H04B1/12 ,  H04B1/26 ,  H04B5/00 ,  H03D3/18

CPC分类号： H04B1/0032 ,  H03D1/2245 ,  H03F3/45475 ,  H03F3/50 ,  H04B1/0003 ,  H04B1/26 ,  H04B5/0093 ,  H03D2200/0047 ,  H03D2200/005 ,  H03D2200/0082 ,  H03D7/165 ,  H03F2200/537 ,  H04B1/123

摘要： A receiving circuit mainly available in a digital modulation type communication system having a plurality of channels, which is capable of reducing power in a receiving system, simplifying the circuit and reducing the power consumption. Upside and downside frequencies corresponding to a central value between channels are separately supplied from a local frequency signal generating circuit 4 to first and second frequency converting circuits 2, 3 so that two output signals are developed with respect to one of a desired wave, upside channel and downside channel. The desired wave present in common in the first and second frequency converting circuits 2, 3 is extracted in a common wave extracting circuit 5, and a frequency offset of .omega.o existing in the output of the common wave extracting circuit 5 is removed a frequency offset circuit 6 and further an unnecessary frequency component is filtered by a filter 8. In addition, the common wave extracting circuit 5 has transformers and, using its inductances, raises the difference between the common wave and the non-common wave within the circuit to more than two times that of a prior art.

摘要翻译： PCT No.PCT / JP95 / 02448 Sec。 371日期：1996年7月29日 102（e）日期1996年7月29日PCT提交1995年11月30日PCT公布。 公开号WO96 / 17441 日期1996年6月6日主要可用于具有多个信道的数字调制型通信系统中的接收电路，其能够降低接收系统的功率，简化电路并降低功耗。 对应于通道之间的中心值的上升和下降频率从本地频率信号发生电路4分别提供给第一和第二频率转换电路2,3，使得两个输出信号相对于所需波形，上行通道 和下行通道。 在公共波提取电路5中提取在第一和第二频率转换电路2,3中共同存在的期望波，并且公共波提取电路5的输出中存在的ωo的频率偏移被去除频率偏移 电路6，另外不必要的频率分量被滤波器8滤波。此外，公共波提取电路5具有变压器，并且使用其电感将公共波与电路内的非公共波之间的差异提高到更多 是现有技术的两倍以上。

公开(公告)号：US06175746B1

公开(公告)日：2001-01-16

申请号：US08828305

申请日：1997-03-28

申请人： Keiichi Nakayama ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Yukichi Aihara ,  Hiroaki Kosugi

发明人： Keiichi Nakayama ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Yukichi Aihara ,  Hiroaki Kosugi

IPC分类号： H04B138

CPC分类号： H04B1/006 ,  H03D7/163 ,  H03D7/165 ,  H04B1/005 ,  H04B1/26 ,  H04B1/406

摘要： A multiband mobile unit communication apparatus is disclosed which comprises: an antenna for receiving L FRQ bands of M radio wave SIGs modulated by N modulating methods, M>L, M>N, N≧L; a frequency synthesizer for generating a LO SIG; an IF SIG generation CKT for generating M IF SIGs using the LO SIG, the FRQ synthesizer generating the LO SIG such that the M IF SIGs have the same intermediate FRQ; a SW CKT for selectively outputting N IF SIGs modulated by the N modulating methods respectively out of the M IF SIGs; N filters for filtering outputs of N IF SIGs from the SW CKT and outputting N filtered IF SIGs respectively; a SW responsive to a SW CONT signal for selectively outputting one of the N filtered IF SIGs; and a quadrature demodulator for quadrature-demodulating one of N filtered IF SIGs and outputting baseband SIG. Different frequency bands of received signals are converted into IF SIGs having the same intermediate frequency. Moreover, different frequency bands of received signals which are modulated by the same method are filtered by the same IF filter.

摘要翻译： 公开了一种多频带移动单元通信装置，包括：用于接收由N个调制方法调制的M个无线电波SIG的L个FRQ频带的天线，M> L，M> N，N> = L; 用于产生LO SIG的频率合成器; 用于使用LO SIG产生M IF SIG的IF SIG生成CKT，FRQ合成器生成LO SIG，使得M IF SIG具有相同的中间FRQ; SW CKT，用于选择性地输出由N个调制方法调制的N个IF SIG在M IF SIG中; N个滤波器，用于滤除来自SW CKT的N IF SIG的输出，并分别输出N个滤波的IF SIG; 响应于SW CONT信号的SW，用于选择性地输出N个滤波的IF SIG中的一个; 以及用于正交解调N个滤波的IF SIG之一并输出基带SIG的正交解调器。 接收信号的不同频带被转换成具有相同中频的IF SIG。 此外，通过相同的方法调制的接收信号的不同频带被相同的IF滤波器滤波。

公开(公告)号：US5794134A

公开(公告)日：1998-08-11

申请号：US675984

申请日：1996-07-09

申请人： Takashi Enoki ,  Fujio Sasaki

发明人： Takashi Enoki ,  Fujio Sasaki

IPC分类号： H04B1/16 ,  H04B1/10

CPC分类号： H04B1/1036

摘要： An unnecessary wave suppressing means suppresses unnecessary waves included in a reception high frequency signal in a frequency band that is changed in accordance with a switching signal. The unnecessary wave suppressing means changes the pass band by inserting a notch into a pass band at a range where a signal is to be suppressed, changing the pass band width so as to exclude a suppression band, retaining a plurality of narrow pass bands for respective frequency bands used and switching among those narrow pass bands in accordance with a frequency band of a receiving signal, or continuously changing the pass band by using a tuning filter.

摘要翻译： 不必要的波形抑制装置抑制根据切换信号而改变的频带中的接收高频信号中包含的不必要的波。 不需要的波形抑制装置通过在要抑制信号的范围内将陷波插入通带来改变通带，改变通带宽度以排除抑制频带，保持多个窄带通 使用频带，并根据接收信号的频带在这些窄通带之间切换，或者通过使用调谐滤波器连续地改变通带。

公开(公告)号：US5966666A

公开(公告)日：1999-10-12

申请号：US796906

申请日：1997-02-06

申请人： Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

发明人： Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

IPC分类号： H03D7/16 ,  H04B1/04 ,  H04B1/26 ,  H04B1/40 ,  H04Q7/38 ,  H04B1/38

CPC分类号： H04B1/406 ,  H03D7/163 ,  H04B1/403

摘要： A frequency synthesizer consists of a voltage-controlled oscillator and a frequency division and distribution section. The frequency division and distribution section, which splits an oscillation signal of the voltage-controlled oscillator into a transmission modulation local oscillation signal and a reception second local oscillation signal while frequency-dividing the oscillation signal of the voltage-controlled oscillator, includes two pairs of frequency dividers and two switches. The frequency division numbers of the two pairs of frequency dividers are so set as to accommodate all the combinations of mobile communications systems and the transmission modulation local oscillation signal/reception second local oscillation signal. The two switches are switched in accordance with a mobile communications system for which a mobile transceiver is operating. The two local oscillation signals are input to a quadrature modulator and a quadrature demodulator, respectively.

摘要翻译： 频率合成器由压控振荡器和分频和分配部分组成。 在对压控振荡器的振荡信号进行分频的同时将压控振荡器的振荡信号分割为发送调制本机振荡信号和接收第二本机振荡信号的分频分配部包括两对 分频器和两个开关。 两对分频器的分频数字被设置为适应移动通信系统的所有组合和发送调制本地振荡信号/接收第二本地振荡信号。 两个开关根据移动收发器正在操作的移动通信系统进行切换。 两个本地振荡信号分别输入到正交调制器和正交解调器。

公开(公告)号：US5852784A

公开(公告)日：1998-12-22

申请号：US813117

申请日：1997-03-07

申请人： Fumio Ito ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

发明人： Fumio Ito ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

IPC分类号： H03D7/16 ,  H03J5/24 ,  H04B1/26 ,  H04B1/30 ,  H04B1/40 ,  H04Q7/38

CPC分类号： H04B1/0057 ,  H03D7/161 ,  H03D7/165 ,  H03J5/244 ,  H04B1/005 ,  H04B1/006 ,  H04B1/26 ,  H04B1/30 ,  H04B1/406

摘要： A multiband mobile unit communication apparatus is disclosed which comprises: an antenna for receiving 1st and 2nd bands of radio wave SIGs including quadrature modulation SIGs; a 1st LO CKT for generating a 1st LO SIG; 1st and 2nd receiving CKTs for generating 1st and 2nd IF SIGs from the 1st and 2nd bands of radio wave SIGs using the 1st LO SIG respectively; a switching CKT responsive to a switching control SIG indicative of 1st and 2nd modes for outputting the 1st IF SIG in the 1st mode and outputting the 2nd IF SIG in the 2nd mode; a 2nd LO CKT for generating 2nd and 3rd LO SIGs in the 1st and 2nd modes respectively; and a quadrature demodulation CKT for demodulating and outputting quadrature SIGs from an output from the switching CKT using the 2nd and third LO SIGs in the 1st and 2nd modes respectively. The 2nd LO CKT comprises: a local oscillator for generating a 4th LO SIG, a FRQ divider for dividing the 4th LO SIG with a given divisor and generating the 2nd LO SIG; and a switch for outputting the 2nd LO SIG in the 1st mode and outputting the 4th LO SIG as the 3rd LO SIG in the 2nd mode in response to the switching control SIG. The given divisor corresponds to a ratio between center FRQs of the 1st and 2nd IF SIGs. The 2nd LO CKT may change the LO FRQ by switchably connecting resonating elements to an oscillator.

摘要翻译： 公开了一种多频带移动单元通信装置，其包括：用于接收包括正交调制SIG的无线电波SIG的第一和第二频带的天线; 用于产生第一LO SIG的第一LO CKT; 第一和第二接收CKT，用于分别使用第一LO SIG从无线电波SIG的第一和第二频带产生第一和第二IF SIG; 切换CKT，响应于指示用于在第一模式中输出第一IF SIG的第一和第二模式的切换控制SIG，并将第二IF SIG输出到第二模式; 分别在第1和第2模式中产生第2和第3 LO信号的第二LO CKT; 以及正交解调CKT，用于分别使用第一和第二模式中的第二和第三LO SIG从来自开关CKT的输出解调和输出正交SIG。 第二LO CKT包括：用于产生第四LO SIG的本地振荡器，用于将第四LO SIG与给定除数分开并生成第二LO SIG的FRQ分频器; 以及用于在第一模式下输出第二LO SIG并且响应于切换控制SIG将第四LO SIG作为第三LO SIG输出到第二模式的开关。 给定的除数对应于第一和第二IF SIG的中心FRQ之间的比率。 第二LO CKT可以通过将谐振元件可切换地连接到振荡器来改变LO FRQ。

公开(公告)号：US4783207A

公开(公告)日：1988-11-08

申请号：US105337

申请日：1987-10-06

申请人： Akira Nagashima ,  Fujio Sasaki

发明人： Akira Nagashima ,  Fujio Sasaki

IPC分类号： B01D45/06 ,  B01D46/42 ,  B01D50/00 ,  B27B17/00 ,  F02B63/02 ,  F02B75/02 ,  F02M35/022 ,  F02M35/024 ,  F02M35/08 ,  F02M35/14 ,  B01D46/10

CPC分类号： B27B17/00 ,  F02B63/02 ,  F02M35/022 ,  F02B2075/025

摘要： An air cleaner comprising a bowl-shaped air cleaner main body whose upper end is opened upwardly and formed with air intake ports at a portion of a peripheral wall, a cap member for covering the opening of the air cleaner main body, a cylindrical cleaner element in the air cleaner main body, and a bowl-shaped dividing member for dividing a space within the cleaner element into an upper space and a lower space, in which the upper space communicates with the air intake ports while it is connected to an annular chamber defined between the air cleaner main body and the cleaner element.

摘要翻译： 一种空气滤清器，包括：碗形空气滤清器主体，其上端向上敞开，并在周壁的一部分形成有进气口，用于覆盖空气滤清器主体的开口的盖构件，圆筒形清洁器元件 在空气滤清器主体中，以及碗形分隔部件，用于将清洁器元件内的空间分成上部空间和下部空间，上部空间与下部空间连通，上部空间和下部空间与空气吸入口连通，同时连接到环形室 限定在空气滤清器主体和清洁器元件之间。

公开(公告)号：US6094564A

公开(公告)日：2000-07-25

申请号：US797862

申请日：1997-02-10

申请人： Wataru Tomiya ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

发明人： Wataru Tomiya ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

IPC分类号： H03J5/24 ,  H04B1/26 ,  H04B1/40 ,  H04Q7/38 ,  H04B1/38 ,  H04B1/06

CPC分类号： H04B1/006 ,  H03J5/24 ,  H04B1/005 ,  H04B1/26 ,  H04B1/406

摘要： A radio communication apparatus is designed for a plurality of different radio communication formats, one of which can be selected. The radio communication apparatus includes a fixed-gain IF amplifier and a variable-gain IF amplifier. One is selected out of the fixed-gain IF amplifier and the variable-gain IF amplifier as an effectively used IF amplifier in response to which of the radio communication formats is selected. The fixed-gain IF amplifier is selected as an effectively used IF amplifier when a narrow-band radio communication format is selected. The variable-gain IF amplifier is selected as an effectively used IF amplifier when a wide-band radio communication format is selected.

摘要翻译： 无线电通信装置被设计用于多种不同的无线电通信格式，其中之一可以被选择。 无线电通信装置包括固定增益IF放大器和可变增益IF放大器。 选择固定增益IF放大器和可变增益IF放大器中的一个作为有效使用的IF放大器，以响应于哪个无线电通信格式被选择。 当选择窄带无线电通信格式时，固定增益IF放大器被选为有效使用的IF放大器。 当选择宽带无线电通信格式时，可变增益IF放大器被选为有效使用的IF放大器。

公开(公告)号：US5835853A

公开(公告)日：1998-11-10

申请号：US769749

申请日：1996-12-20

申请人： Takashi Enoki ,  Fujio Sasaki

发明人： Takashi Enoki ,  Fujio Sasaki

IPC分类号： H03D7/16 ,  H04B1/18 ,  H04B1/26 ,  H04B7/08

CPC分类号： H04B1/006 ,  H03D7/161 ,  H04B1/005 ,  H04B1/26 ,  H04B7/0802

摘要： A receiver comprises; an input TERM (11) for receiving a radio wave signal including at least one of 1st and 2nd radio wave components from an antenna; a 1st SW (12); a 1st BPF (13) for extracting the 1st radio wave component; a 2nd BPF (14) for extracting the 2nd radio wave component; a 2nd SW (17), the 1st and 2nd SW to selectively forming 1st and 2nd SIG passages through the 1st BPF in a 1st mode and the 2nd BPF in a 2nd mode respectively; a 1st LO (19) for generating 1st and 2nd LO SIGs (30a, 30b) in the 1st and 2nd modes respectively; a 1st mixer (18) for mixing an output of the 2nd SW with the 1st and 2nd LO SIGs in the 1st and 2nd modes respectively; a 1st FLT (21) for filtering an output of the 1st mixer to output 1st and 2nd IF SIGs having the same FRQ; a 2nd LO (22), 2nd mixer (23), a 2nd FLT (25) for generating 3rd and 4th IF SIGs corresponding to the 1st and 2nd radio wave components from an output of the 1st FLT in the 1st and 2nd modes, respectively. A receiver includes two sets of the receivers except 1st and 2nd LOs commonly used, which provides a diversity receiving. The receiver may further comprise a SW and another input coupled to another antenna. This SW provides another diversity receiving. A modified receiver provides a diversity receiving after an antenna and after detection.

摘要翻译： 接收机包括： 输入TERM（11），用于从天线接收包括第一和第二无线电波分量中的至少一个的无线电波信号; 第一SW（12）; 用于提取第一无线电波分量的第一BPF（13）; 用于提取第二无线电波分量的第二BPF（14）; 第二SW（17），第一和第二SW，分别以第一模式选择性地形成通过第一BPF的第一和第二SIG通道和第二模式的第二BPF; 第一LO（19），用于分别在第一和第二模式中产生第一和第二LO SIG（30a，30b）; 第一混频器（18），用于分别在第一和第二模式下混合第二SW的输出与第一和第二LO SIG; 第一FLT（21），用于对第一混频器的输出进行滤波，以输出具有相同FRQ的第一和第二IF SIG; 第二LO（22），第二混频器（23），第二FLT（25），用于分别从第一和第二模式中的第一FLT的输出产生与第一和第二无线电波分量对应的第三和第四IF SIG 。 接收机包括通常使用的第一和第二LO的两组接收机，其提供分集接收。 接收机还可以包括SW和耦合到另一个天线的另一个输入。 该SW提供另一种分集接收。 经修改的接收机在天线和检测后提供分集接收。

公开(公告)号：US06236840B1

公开(公告)日：2001-05-22

申请号：US08988025

申请日：1997-12-10

申请人： Yukichi Aihara ,  Fujio Sasaki

发明人： Yukichi Aihara ,  Fujio Sasaki

IPC分类号： H04B144

CPC分类号： H04B17/18 ,  H04B17/102

摘要： A transmission output detecting circuit for use in a radio transmitter-receiver of a TDD communication system having a TDD switch for connecting a transmission system to an antenna system in a transmitting period and for connecting a reception system to the antenna system in a receiving period; comprising a detection means for detecting transmission output on the basis of leakage power of the TDD switch in the transmitting period. The transmission output can be detected with low power consumption without making the transmission power branch out.

摘要翻译： 一种发送输出检测电路，用于TDD通信系统的无线电发射机 - 接收机，该TDD通信系统具有用于在发送周期内将传输系统连接到天线系统并在接收时段中将接收系统连接到天线系统的TDD切换器; 包括检测装置，用于在发送周期中基于TDD开关的泄漏功率来检测发送输出。 可以在低功耗的情况下检测发送输出，而不会使发送功率分支。

公开(公告)号：US06032032A

公开(公告)日：2000-02-29

申请号：US787311

申请日：1997-01-24

申请人： Hidenobu Kato ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

发明人： Hidenobu Kato ,  Seiichi Yamaguchi ,  Fujio Sasaki ,  Hiroaki Kosugi

IPC分类号： H04B1/40 ,  H04B1/16 ,  H04B1/26 ,  H04Q7/38

CPC分类号： H04B1/26 ,  H04B1/16

摘要： A radio communication apparatus is designed for at least first and second radio communication formats which prescribe first and second desired IF pass bandwidths respectively. The first desired IF pass bandwidth is greater than the second desired IF pass bandwidth. The radio communication apparatus includes an IF band-pass filter processing a first IF signal into a second IF signal and having a predetermined pass bandwidth corresponding to the first desired IF pass bandwidth. A demodulator recovers a first baseband signal from the second IF signal generated by the IF band-pass filter. A baseband filter processes the first baseband signal generated by the demodulator into a second baseband signal. The first baseband signal generated by the demodulator is selected as a final output signal when the first IF signal is of the first radio communication format. The second baseband signal generated by the baseband filter is selected as a final output signal when the first IF signal is of the second radio communication format.

摘要翻译： 无线电通信装置被设计用于分别规定第一和第二期望的IF通过带宽的至少第一和第二无线电通信格式。 第一个期望的IF通过带宽大于第二期望的IF通过带宽。 无线通信装置包括：IF带通滤波器，将第一IF信号处理成第二IF信号，并具有对应于第一期望IF通带宽度的预定通带宽度。 解调器从IF带通滤波器产生的第二IF信号恢复第一基带信号。 基带滤波器将由解调器产生的第一基带信号处理成第二基带信号。 当第一IF信号是第一无线电通信格式时，由解调器产生的第一基带信号被选择为最终的输出信号。 当第一IF信号是第二无线电通信格式时，由基带滤波器产生的第二基带信号被选择为最终输出信号。