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1. 发明申请

WO0054421A9 RADIO TERMINAL DEVICE 审中-公开
标题翻译：无线终端设备
公开(公告)号：WO0054421A9
公开(公告)日：2001-03-29
申请号：PCT/JP9901204
申请日：1999-03-11
申请人： MITSUBISHI ELECTRIC CORP , KATSURA TAKATOSHI , ITOH KENJI , FUKUYAMA SHINJIROU , MOCHIZUKI MITSURU , NAGANO HIROAKI , MATSUNAMI YOSHINORI
发明人： KATSURA TAKATOSHI , ITOH KENJI , FUKUYAMA SHINJIROU , MOCHIZUKI MITSURU , NAGANO HIROAKI , MATSUNAMI YOSHINORI
IPC分类号： H03D3/00 , H04B1/30 , H04L27/233 , H04J13/00 , H04L27/22
CPC分类号： H03D3/007 , H04B1/30 , H04L27/2332
摘要： A radio terminal device comprises an antenna (10), a transmitter circuit (11), a direct conversion receiver circuit (12), a circulator (13), and a band-rejection filter (14). A direct conversion receiver circuit (12) is smaller in size than a heterodyne receiver circuit and involves fewer spurious signals to be removed. Therefore, the entire radio terminal device becomes small. In addition, the direct conversion receiver circuit (12) comprises even-harmonic mixers (20, 21), and the frequency (flo) of a local oscillator (LO) is 1/2 of the received signal frequency (frx), so that there is no deterioration in sensitivity due to the leakage of local oscillation wave (LO) to the antenna (10).
摘要翻译：无线电终端设备包括天线（10），发射机电路（11），直接转换接收机电路（12），循环器（13）和带阻滤波器（14）。直接转换接收器电路（12）的尺寸小于外差接收器电路，并且涉及更少的杂散信号被去除。因此，整个无线终端装置变小。另外，直接变换接收器电路（12）包括偶次谐波混频器（20,21），本地振荡器（LO）的频率（flo）是接收信号频率（frx）的1/2，使得由于本地振荡波（LO）向天线（10）的泄漏，灵敏度没有降低。

2. 发明公开

EP1083667A4 RADIO TERMINAL DEVICE 审中-公开
标题翻译： FUNKENDGERÄT
公开(公告)号：EP1083667A4
公开(公告)日：2004-07-14
申请号：EP99906470
申请日：1999-02-24
申请人： MITSUBISHI ELECTRIC CORP
发明人： KATSURA TAKATOSHI , ITOH KENJI , FUKUYAMA SHINJIROU , MOCHIZUKI MITSURU , NAGANO HIROAKI , MATSUNAMI YOSHINORI , ISHIZU FUMIO , HAYASHI RYOJI
IPC分类号： H03G3/00 , H04L27/08 , H04B1/30 , H04B1/16 , H04B1/26
CPC分类号： H03G3/001
摘要： A logarithmic amplifier (11) having a large input range first detects the level of the baseband signal on the input side of a variable gain amplifier circuit (8). Based on the detected level, a control section (13) performs coarse feedfoward control of the gain of the variable gain amplifier circuit (8). A root-mean-square circuit (14) determines the output level of an A/D converter (10) and supplies it to the control section (13). Based on the detected level, the control section (13) performs fine feedback control of the variable gain amplifier (8).
摘要翻译：具有大输入范围的对数放大器（11）首先检测可变增益放大器电路（8）的输入侧上的基带信号的电平。基于检测到的电平，控制部分（13）对可变增益放大器电路（8）的增益进行粗馈源控制。均方根电路（14）确定A / D转换器（10）的输出电平并将其提供给控制部分（13）。基于检测到的电平，控制部分（13）执行可变增益放大器（8）的精细反馈控制。

3. 发明公开

EP1081871A4 RADIO TERMINAL 审中-公开
标题翻译： FUNKENDGERÄT
公开(公告)号：EP1081871A4
公开(公告)日：2004-06-23
申请号：EP99961470
申请日：1999-12-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： ITOH KENJI , NAGANO HIROAKI , KATSURA TAKATOSHI , FUKUYAMA SHINJIROU , MOCHIZUKI MITSURU , MATSUNAMI YOSHINORI , SHIMOZAWA MITSUHIRO , ISHIZU FUMIO , HAYASHI RYOJI
IPC分类号： H03D7/14 , H04B1/30
CPC分类号： H03D7/1408 , H04B1/30
摘要： A portable telephone provided with a receiving circuit of direct conversion type has a passive low-pass filter (32) for filtering the interference waves of the channels other than the channel of concern and its adjacent channel interposed between an I-channel mixer (28) and a baseband circuit (36) and a passive low-pass filter (34) for filtering the interference waves of the channels other than the channel of concern and its adjacent channel interposed between a Q-channel mixer (30) and a baseband circuit (36). These low-pass filters (32, 34) are of differential type, so that their circuit scales are small and have low power consumptions. The interference waves are filtered by the passive low-pass filters (32, 34) and active low-pass filters (56, 58), so that only desired channels can be reliably received.
摘要翻译：具有直接转换型接收电路的便携式电话机具有一个无源低通滤波器（32），用于滤除除了涉及的信道之外的信道和插入在I信道混频器（28）之间的相邻信道的干扰波，和一个基带电路（36）和一个无源低通滤波器（34），用于对除了所关心的信道和插入在Q信道混频器（30）和基带电路（ 36）。这些低通滤波器（32,34）是差分型的，所以它们的电路规模很小并且功耗较低。干扰波由无源低通滤波器（32,34）和有源低通滤波器（56,58）滤波，使得只有期望的信道能够被可靠地接收。

4. 发明公开

EP0676861A4 BALANCING MIXER, DISTRIBUTOR AND BAND BLOCKING FILTER USED THEREFOR, AND METHOD FOR MIXING FREQUENCIES. 失效
标题翻译：对称渲染混合机采用频率混合中使用的通讯及带扣和方法。
公开(公告)号：EP0676861A4
公开(公告)日：1996-08-14
申请号：EP94909305
申请日：1994-03-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： ITOH KENJI , SIGEMATSU TOMONORI , IIDA AKIO
IPC分类号： H01P5/10 , H03D7/12 , H03D7/14 , H03D9/06 , H03D7/18 , H03D7/00
CPC分类号： H03D9/0675 , H03D7/125 , H03D7/14 , H03D2200/009
摘要： A locally oscillated wave is distributed in phase to unit mixers (2a) and (2b) in order to suppress more the unwanted waves generated in the case where the frequencies (flo) of the locally oscillated wave are lower than the frequency (fin) of the signal wave. On the other hand, the signal waves are distributed by a 180-degree distributor (4) in inverted phase to the unit mixers (2a) and (2b). The unit mixers (2a) and (2b) mix the frequencies of the locally oscillated wave thus distributed and signal wave, and supply the result to a 180-degree combiner (6) through a BRF (16a) or (16b). The 180-degree combiner (6) combines in opposite phase the outputs of the BRF (16a) and (16b), and outputs them. Among the unwanted waves, the harmonics of the locally oscillated wave is suppressed by the opposite-phase combination, while the signal wave is suppressed by the BRFs (16a) and (16b). The mixed wave of the harmonics of the locally oscillated wave and signal wave are suppressed by the in-phase distribution of the locally oscillatedwave and the opposite-phase distribution of the signal wave.

5. 发明专利

DE60229068D1 未知
公开(公告)号：DE60229068D1
公开(公告)日：2008-11-06
申请号：DE60229068
申请日：2002-12-13
申请人： MITSUBISHI ELECTRIC CORP
发明人： MISU KOICHIRO , IBATA KOJI , MURAI KOUJI , YOSHIDA KENJI , YAMAGATA KOUSAKU , ITOH KENJI , MURASE ISAO , KOSHINAKA MASAO
IPC分类号： H03H9/64 , H03H7/01 , H03H9/54 , H03H9/58
摘要： Filter circuitry is provided with a series element and a parallel element. The filter circuitry transmits signals that fall within a certain passband and attenuates signals that don't fall within the certain passband. The series element includes a resonance element (2) having antiresonance characteristics, and the parallel element includes a series circuit including an inductor (14) and a capacitor (15).

6. 发明专利

DE69921475T2 未知
公开(公告)号：DE69921475T2
公开(公告)日：2006-02-02
申请号：DE69921475
申请日：1999-03-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： KATSURA TAKATOSHI , ITOH KENJI , FUKUYAMA SHINJIROU , MOCHIZUKI MITSURU , NAGANO HIROAKI , MATSUNAMI YOSHINORI , SHIMOZAWA MITSUHIRO , ISHIZU FUMIO , HAYASHI RYOJI
IPC分类号： H03D3/00 , H03D7/02 , H04B1/30 , H04J13/00 , H04L25/06 , H04L27/14 , H04L27/22
摘要： In a cellular telephone having a receiving circuit (14) of a direct conversion type using an even harmonic orthogonal mixer (24), high-pass filters (56, 58, 64, 66) for removing a DC offset component are arranged before and after a variable gain amplifier (60, 62) in a base band circuit (30). The DC offset component occurred in the even harmonic orthogonal mixer (24) is always constant, and the DC offset component occurred in the variable gain amplifier (60, 62) frequently varies so that a cutoff frequency (fc1) of the front high-pass filter (56, 58) is set to be lower than a cutoff frequency of the rear high-pass filter (64, 66), and the frequencies are set to achieve a fast transition response.

7. 发明专利

DE19708650A1 Standard frequency generator for radio communications transceiver 未知
公开(公告)号：DE19708650A1
公开(公告)日：1998-01-02
申请号：DE19708650
申请日：1997-02-21
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAJIMA KENICHI , ITOH KENJI , NISHIMURA SHUJI , DOI MASAYUKI , IIDA AKIO
IPC分类号： H03B28/00 , H03L7/18 , H03L7/183 , H03K3/01 , H03L7/06
摘要： The frequency generator has a reference oscillator arrangement (1), which includes a variable frequency divider (13) for converting the output signals, from a direct digital synthesiser (12), by an appropriate frequency division. This is supplied with frequency setting parameters for a required frequency output, in dependence on the supplied frequency division parameters. The output from the reference oscillator is fed to a phase comparator (21) within a phase locked loop (2) arrangement acting as a standard frequency generator. A second frequency divider (24) is supplied with different frequency division parameters than those supplied to the first divider.

8. 发明公开

EP1164719A4 CELLULAR TELEPHONE 审中-公开
标题翻译：手机
公开(公告)号：EP1164719A4
公开(公告)日：2004-12-08
申请号：EP00900042
申请日：2000-01-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAGANO HIROAKI , FUKUYAMA SHINJIRO , ITOH KENJI
IPC分类号： H04B7/04 , H04B7/08 , H04B7/26
CPC分类号： H04B7/0805
摘要： A dual-mode cellular telephone of diversity reception for W-CDMA and PDC systems comprises a transmitting and receiving antenna (1), a receiving antenna (2), a W-CDMA transmitter circuit (11), a W-CDMA receiver circuit (12), PDC transmitter circuit (13), a PDC receiver circuit (14), switches (SW1-SW3) for selective connection between the antennas (1, 2) and the W-CDMA circuits (11, 12) or the PDC circuits (13, 14), and a band separator (3).

9. 发明公开

EP1315230A4 HIGH-FREQUENCY LINE AND HIGH-FREQUENCY CIRCUIT 审中-公开
标题翻译：高频率管理和高频电路
公开(公告)号：EP1315230A4
公开(公告)日：2004-06-23
申请号：EP00956812
申请日：2000-08-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAJIMA KENICHI , TSURU MASAOMI , UESUGI MIKIO , ITOH KENJI , ISOTA YOJI
IPC分类号： H01L27/08 , H01P3/06 , H01P3/08 , H01L27/04
CPC分类号： H01P3/081 , H01L27/08 , H01P3/06
摘要： A high-frequency circuit for carrying high-frequency signals in microwave and millimeter bands comprises a semiconductor substrate (21), a grounding conductor (22) provided under the semiconductor substrate (21), an insulator (23) provided on the semiconductor substrate (21) and having higher effective dielectric constant than the semiconductor substrate (21), and a strip conductor (25) provided on a recessed part (24) in the middle area of the insulator (23).

10. 发明公开

EP1083668A4 RADIO TERMINAL UNIT 审中-公开
标题翻译：无线终端
公开(公告)号：EP1083668A4
公开(公告)日：2004-06-16
申请号：EP99906486
申请日：1999-02-25
申请人： MITSUBISHI ELECTRIC CORP
发明人： KATSURA TAKATOSHI , ITOH KENJI , FUKUYAMA SHINJIROU , MOCHIZUKI MITSURU , NAGANO HIROAKI , MATSUNAMI YOSHINORI , ISHIZU FUMIO , HAYASHI RYOJI
IPC分类号： H03G3/00 , H03G3/30 , H04B1/30 , H04B1/16
CPC分类号： H03G3/3068 , H03G3/001
摘要： The level of a baseband signal on the input of a variable-gain amplifier (8) at the beginning of operation is detected by a logarithmic amplifier (11) having a wide dynamic range. A control section (18) controls the gain of a low-noise amplifier (15) in the stage preceding to a low-pass filter (7) and the gain of a variable-gain amplifier (8) according to the level detected so that the analog baseband part can be kept from saturation even if the level of the input signal is high.

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