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1. 发明专利

JP2005295517A Mixer circuit and receiver circuit using the same 审中-公开
标题翻译：使用相同的混合器电路和接收器电路
公开(公告)号：JP2005295517A
公开(公告)日：2005-10-20
申请号：JP2005058811
申请日：2005-03-03
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： HAMAZAKI TOSHINORI , ISHIDA KAORU
IPC分类号： H03D7/14 , H04B1/30 , H04L27/38
摘要： PROBLEM TO BE SOLVED: To provide a receiver circuit in which DC offset variations caused by a quadrature demodulator are reduced using a small number of peripheral components in small circuit scale. SOLUTION: This mixer circuit is provided with a quadrature demodulator including a Gilbert cell in which a first differential amplifier and a switching circuit are vertically stacked for connection, and a bypass circuit including a second differential amplifier having a pair of differential input terminals short-circuited with each other, and provided in parallel with the first differential amplifier. The first differential amplifier is comprised of transistors 9, 10, the switching circuit is comprised of transistors 11-14, and the second differential amplifier is comprised of transistors 15, 16. Correction of a DC offset is performed by inactivating the first differential amplifier and activating the second differential amplifier, and detecting the DC offset under such state. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种使用小电路规模的少量外围组件来减少由正交解调器引起的DC偏移变化的接收机电路。解决方案：该混频器电路设置有包括吉尔伯特单元的正交解调器，其中第一差分放大器和开关电路被垂直堆叠用于连接;以及旁路电路，包括具有一对差分输入端子的第二差分放大器彼此短路并与第一差分放大器并联提供。第一差分放大器由晶体管9,10组成，开关电路由晶体管11-14组成，第二差分放大器由晶体管15,16组成。通过使第一差分放大器和激活第二差分放大器，并在这种状态下检测DC偏移。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2001057578A LINEAR COMPENSATION CIRCUIT 失效
公开(公告)号：JP2001057578A
公开(公告)日：2001-02-27
申请号：JP23074499
申请日：1999-08-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAMAZAKI TOSHINORI
IPC分类号： H03F1/32 , H04B1/04 , H04L27/20 , H04L27/36
摘要： PROBLEM TO BE SOLVED: To enhance degree of distortion improvement in a Cartesian feedback circuit that reduces the distortion in a radio transmitter. SOLUTION: A local in-phase demodulation signal I4 and a local quadrature demodulation signal Q4 obtained by applying locally demodulating to branched part of a transmission output are subtracted from an in-phase signal I2 and a quadrature signal Q2 respectively to calculate an in-phase error signal I3 and a quadrature error signal Q3. The in-phase error signal I3 and the quadrature error signal Q3 are converted into digital signals, given to a correction signal generating circuit 12, which generates a correction signal. The correction signal are converted into analog signals and added to the in-phase error signal I3 and the quadrature error signal Q3 at adders 3, 4 respectively to enhance a degree of distortion improvement. While keeping a distortion improvement effect, the bandwidth capable of distortion improvement is extended and distortion due to a characteristic change or the like resulting from a noise, a temperature and a power supply voltage change of a transmitter can be enhanced.

3. 发明专利

JP2004266740A Mixer circuit 审中-公开
公开(公告)号：JP2004266740A
公开(公告)日：2004-09-24
申请号：JP2003057306
申请日：2003-03-04
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： HAMAZAKI TOSHINORI , TATE MASAMICHI , HIRANO SHUNSUKE
IPC分类号： H03D7/14 , H03G3/10
摘要： PROBLEM TO BE SOLVED: To provide a mixer circuit of a gain switching type in which a gain at low gain setting is set to an optional value other than a multiple of zero.
SOLUTION: The mixer circuit is composed of two gain switching mixers: a first gain switching mixer for a high gain and a second gain switching mixer for a low gain. These gain switching mixers 10A and 10B is constituted by including: a differential amplifier circuits 11A and 11B for amplifying a noninverting signal and an inverting signal received from signal input terminals RF1, RF2; a Gilbert cell 12A (12B) for applying multiplication processing of the amplified signal to local signals received from local input terminals LO1, LO2 (LO3, LO4); and a current switching circuit 13A (13B) for applying multiplication of gain switching signals received from gain control terminals SW1, SW2 (SW3, SW4) to the signal subjected to the multiplication processing to thereby switch a current flowing through a load connected in common.
COPYRIGHT: (C)2004,JPO&NCIPI

4. 发明专利

JPH10190760A SATURATION DETECTION CIRCUIT/METHOD FOR HIGH FREQUENCY AMPLIFIER 失效
公开(公告)号：JPH10190760A
公开(公告)日：1998-07-21
申请号：JP35639696
申请日：1996-12-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAMAZAKI TOSHINORI
IPC分类号： H04L27/34 , H04B1/04 , H04B1/26
摘要： PROBLEM TO BE SOLVED: To provide a highly precise saturation detection circuit through the use of an orthogonal error signal whose size is zero when a high frequency amplifier is not saturated and which suddenly rises when it is saturated for saturation level detection. SOLUTION: A cartesion feedback circuit is provided with subtraction circuits 2-1 and 2-2 subtracting local in-phase/local orthogonal demodulation signals from in-phase and orthogonal input signals, an orthogonal modulator 3 which orthogonally modulates the calculated in-phase and orthogonal error signals with a carrier, a high frequency amplifier 4 amplifying the orthogonally modulated signal, a connector 5 transmitting/outputting the amplified signal and an orthogonal demodulator 6 branching a part and demodulating it into the local in-phase and local orthogonal demodulation signals by using the carrier whose phase is adjusted and outputting the signal to the subtraction circuits are provided. A level detection circuit 9 for detecting the rise when the orthogonal error signal from the subtraction circuit is saturated by using a comparison reference value is provided.

5. 发明专利

JP2003008670A 90° phase shifter 审中-公开
标题翻译： 90°相位移
公开(公告)号：JP2003008670A
公开(公告)日：2003-01-10
申请号：JP2001186900
申请日：2001-06-20
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： KITAMURA YORIHIRO , IKEDO TAIICHI , OKA TATSUTO , HAMAZAKI TOSHINORI
IPC分类号： H04L27/18
摘要： PROBLEM TO BE SOLVED: To provide an excellent 90° phase shifter that outputs each four equiamplitude signals with a phase difference of 90° in a wide-band.
SOLUTION: An output 303 is generated by multiplying an input signal 301 with the Gilbert model of a multiplication circuit. The generated output 303 is input into a filter 304 that passes a double frequency of an input signal 301 to gain an excellent double multiplication output 305 in the duty ratio of 50%. Then the double multiplication output 305 is input into a DFF 306, and into a DFF 308 through a NOT circuit 307. Thereby the DFF 306 and the DFF 308 are operated in the rise and the fall of the double multiplication output 305 respectively to generate excellent each output signal 3010 and 3011 provided with the phase difference of 90° in the half frequency to the double multiplication output 305 by two clock division circuits 309 designed according to this structure.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供优良的90度移相器，输出相位差为90度的四个等幅信号。在宽带。解决方案：通过将输入信号301与乘法电路的吉尔伯特模型相乘来产生输出303。所生成的输出303被输入到滤波器304，滤波器304通过输入信号301的双倍频率，以占空比为50％的方式获得良好的双乘法输出305。然后，双乘法输出305通过非电路307输入到DFF 306和DFF308中。因此，DFF 306和DFF 308分别在双乘法输出305的上升和下降中运行以产生优异的每个输出信号3010和3011具有90度的相位差。在通过根据该结构设计的两个时钟分频电路309的半倍频到双倍乘法输出305。

6. 发明专利

JP2002185274A GAIN SWITCHING AMPLIFYING CIRCUIT 失效
公开(公告)号：JP2002185274A
公开(公告)日：2002-06-28
申请号：JP2000385707
申请日：2000-12-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAMAZAKI TOSHINORI , MIYAHARA YASUTOKU
IPC分类号： H03G3/10 , H03G1/04
摘要： PROBLEM TO BE SOLVED: To provide a gain switching amplifying circuit capable of decreasing a phase change associated with gain switching in a high-frequency amplifying circuit. SOLUTION: An amplifying circuit having phase characteristics identical to those at a high gain is provided in series in an ordinary gain switching amplifying circuit, and the output thereof is connected to the output of the gain switching amplifying circuit. Thus, phase characteristics identical to those at a high gain can be obtained at a low gain, thereby decreasing the phase change associated with the gain switching.

7. 发明专利

JP2002141777A PHASE SHIFTER 失效
公开(公告)号：JP2002141777A
公开(公告)日：2002-05-17
申请号：JP2000330965
申请日：2000-10-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KITAMURA YORIHIRO , IKEDO TAIICHI , OKA TATSUTO , HAMAZAKI TOSHINORI , SAKAIHARA KUNIHIKO
IPC分类号： H03H11/22 , H03H11/16 , H03H11/18
摘要： PROBLEM TO BE SOLVED: To provide a phase shifter that can output 4 signals with equal amplitude and a phase difference of 90 degrees with each other over a broadband even when a frequency of the input signal fluctuates. SOLUTION: A poly-phased filter 301 receiving two input signals 300 with a phase difference of 180 degrees generates 4 poly-phased filter output signals 302 with equal amplitude and a phase difference of 90 degrees with each other. In this case, a frequency doubler 303 receiving the poly-phased filter output signals 302 generates doubler output signals 304 with a frequency twice that of the input signals 300 and whose duty factor is 50%. Then a 1/2 frequency divider 306 receives the doubler output signals 304 whose duty factor is accurately 50% and generates 1/2 frequency divider output signals with a frequency being half that of its input signal and with a phase different of 90 degrees with each other. Thus, the phase shifter can provide outputs of 4 1/2 frequency divider output signals 307 with the same frequency, equal amplitude and a phase difference of 90 degrees with each other over a broadband.

8. 发明专利

JP2001196874A GAIN REVISION CIRCUIT FOR INTEGRATED FREQUENCY CONVERSION CIRCUIT 失效
公开(公告)号：JP2001196874A
公开(公告)日：2001-07-19
申请号：JP2000003705
申请日：2000-01-12
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAMAZAKI TOSHINORI
IPC分类号： H03G3/10
摘要： PROBLEM TO BE SOLVED: To revise a gain of an integrated frequency conversion circuit with a simple method. SOLUTION: A MIX signal is given to a balanced signal input terminal of the integrated frequency conversion circuit via resistors R8, R9 connected to DC-cut capacitors C1, C2. The gain of the integrated frequency conversion circuit fixedly depends on a resistor R3 while resistors R8, R9 placed at the outside of an integrated circuit permit the gain adjustment of the integrated frequency conversion circuit. Thus, the gain of the integrated frequency conversion circuit can be changed with a simple method without re-design/re- manufacture of an integrated circuit where the resistors to decide its gain are changed.

9. 发明专利

JP2000244341A SATURATION PREVENTING CIRCUIT IN CARTESIAN FEEDBACK CIRCUIT 失效
公开(公告)号：JP2000244341A
公开(公告)日：2000-09-08
申请号：JP4506599
申请日：1999-02-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAMAZAKI TOSHINORI
IPC分类号： H04B1/04
摘要： PROBLEM TO BE SOLVED: To unnecessitate a maximum operating level setting operation before transmission in the Cartesian feedback circuit of a radio transmitter. SOLUTION: The phase differences between a common phase error signal I3, an orthogonal error signal Q3 and a local common phase demodulation signal I4, a local orthogonal demodulation signal Q4 in the Cartesian feedback circuit is obtained by a phase comparing circuit 12. Based on the phase difference, a saturation detecting circuit 11 detects saturation at the time of transmission. An amplitude limiter circuit 10 executes the amplitude control of the same phase input I1 at the time and an orthogonal input Q1. Since saturation can be detected at the time of transmission, maximum level adjusting operation before transmission is unnecessitated. Even in the radio transmitter where a maximum level adjusting operation before transmission is not permitted, the Cartesian feedback circuit can be used to improve the linearity of modulation to reduce unnecessary radiation outside of a band to eliminate disturbance to an adjacent channel.

10. 发明专利

JP2006165985A Radio transmission circuit with temperature compensation and radio reception circuit 审中-公开
标题翻译：具有温度补偿和无线电接收电路的无线传输电路
公开(公告)号：JP2006165985A
公开(公告)日：2006-06-22
申请号：JP2004354109
申请日：2004-12-07
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： HAMAZAKI TOSHINORI
IPC分类号： H04B1/04 , H04B1/16
摘要： PROBLEM TO BE SOLVED: To omit a temperature compensation circuit for a power amplifier circuit in a radio transmission circuit.
SOLUTION: Temperature compensation is not performed in the power amplifier circuit 31, and the temperature compensation of amplifier circuits 12 and 14 for transmission signals or a frequency conversion circuit 13 for the transmission signals inside a transmission signal generation circuit 10 and the temperature compensation of the power amplifier circuit 31 following it are performed together in the temperature compensation circuit 20 of the transmission signal generation circuit 10.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：省略用于无线电传输电路中的功率放大器电路的温度补偿电路。解决方案：在功率放大器电路31中不进行温度补偿，并且用于发送信号的放大器电路12和14的温度补偿或用于发送信号发生电路10内的发送信号的频率转换电路13和温度在发送信号发生电路10的温度补偿电路20中一起执行跟随其后的功率放大器电路31的补偿。（C）2006，JPO＆NCIPI

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