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81. 发明专利

JP2002290207A PHASE ADJUSTMENT CIRCUIT 失效
公开(公告)号：JP2002290207A
公开(公告)日：2002-10-04
申请号：JP2001088637
申请日：2001-03-26
申请人： NIPPON ELECTRIC ENG
发明人： SHINOZUKA TOSHIYUKI
IPC分类号： H03H11/22
摘要： PROBLEM TO BE SOLVED: To provide a phase adjustment circuit that automatically corrects a change in a phase shift due to variations in elements and an ambient temperature even when receiving in input signal which is an NRZ code data signal so as to keep the phase shift of a variable voltage phase shifter at 90 degrees at all times. SOLUTION: The phase adjustment circuit is provided with the two variable voltage phase shifters 4, 5 that shift the phase of the input signal, a delay circuit 8 that delays the signal whose phase is shifted by the variable voltage phase shifters 4, 5, a D flip-flop 7 that identifies the signal whose phase is shifted by the variable voltage phase shifters through the comparison with the input signal, a delay circuit 9 that delays a signal denoting the identification result of the D flip-flop 7, a D flip-flop 10 that identifies an output signal from the delay circuit 9 by using an output signal from the delay circuit 8, and a low-pass filter 11 that smoothes a signal denoting the identification result of the D flip-flop 10. The phase adjustment circuit generates a DC voltage depending on only on the phase shift by the variable voltage phase shifters independently of a data pattern of the input signal and uses the DC voltage for respective phase shift control signals of the two variable voltage phase shifters 4, 5 as a feedback in a way of keeping the phase shifts of the variable voltage phase shifters 4, 5 at 90 degrees resulting that the phase shifts by the two variable voltage phase shifters 4, 5 can always be kept at 90 degrees.

82. 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.

83. 发明专利

JP2001358560A GAIN SWITCHING METHOD OF PHASE SHIFTER CIRCUIT, CONTROL CIRCUIT OF PHASE SHIFTER CIRCUIT AND PHASE SHIFTER CIRCUIT 失效
公开(公告)号：JP2001358560A
公开(公告)日：2001-12-26
申请号：JP2000179469
申请日：2000-06-15
申请人： FUJITSU LTD , FUJITSU VLSI LTD
发明人： ARIMURA KAZUYOSHI
IPC分类号： H03H11/22 , H03G3/20
摘要： PROBLEM TO BE SOLVED: To miniaturize a circuit without installing an input terminal for inputting only a control signal from an outer device. SOLUTION: A switching control part 36 generates the control signals DA and DB for selecting a pair of first and second differential amplifiers 32 and 33 or a pair of third and fourth differential amplifiers 34 and 35 based on an input signal Sin. The switching control part 36 generates the control signal DA selecting a pair of first and second differential amplifiers 32 and 33 in the case of the input signal Sin of a first frequency f1. The switching control part 36 generates the control signal DB for selecting a pair of third and fourth differential amplifiers 34 and 35 in the case of the input signal Sin of a second frequency f2.

84. 发明专利

JP2000304570A PHASE ADJUSTING CIRCUIT, SCALE SIGNAL GENERATING CIRCUIT, AND POSITION MEASURING INSTRUMENT 失效
公开(公告)号：JP2000304570A
公开(公告)日：2000-11-02
申请号：JP11323999
申请日：1999-04-21
申请人： SONY CORP
发明人： MATSUYAMA YASUHIKO
IPC分类号： G01D5/347 , G01B7/00 , G01D5/244 , G01D5/245 , H03H11/22 , H03L7/00 , G01D5/34
摘要： PROBLEM TO BE SOLVED: To improve resolution by shortening the wavelength by making it possible to obtain a signal with a 90 deg. phase difference by canceling a phase error through the phase adjustment of the position measuring instrument. SOLUTION: The phase adjusting circuit which generates a couple of signals having a 90 deg. phase difference according to two out-of-phase detection signals Ss and Sc has an input level adjustment part 3 which adjusts the amplitude of at least one detection signal to a specific level and a signal process part 4 which performs a signal process including at least one of addition and subtraction between the two detection signals after the level adjustment and generates a couple of 90 deg.-out-of-phase output signals or a single output signal having a 90 deg. phase difference from the other detection signal. Further, the scale signal generating circuit is equipped with an output level adjustment part 5 and a scale signal generation part 6. The position measuring instrument is further equipped with detection parts 2s and 2c, an A/D conversion part 7, and a storage part 8.

85. 发明专利

JP2000501263A 失效
公开(公告)号：JP2000501263A
公开(公告)日：2000-02-02
申请号：JP52041697
申请日：1996-11-27
IPC分类号： H03H7/01 , H03H5/12 , H03H11/04 , H03H11/22 , H03H11/28 , H03H11/46

86. 发明专利

JP2988583B2 失效
公开(公告)号：JP2988583B2
公开(公告)日：1999-12-13
申请号：JP13734289
申请日：1989-05-30
申请人： KONIN* FUIRITSUPUSU EREKUTORONIKUSU NV
发明人： YOHANESU OTSUTO FUOORUMAN
IPC分类号： H03H7/01 , H03H11/04 , H03H11/12 , H03H11/22

87. 发明专利

JPH10209814A HIGH FREQUENCY SIGNAL DISTRIBUTOR, HIGH FREQUENCY SIGNAL SYNTHESIZER, ORTHOGONAL MIXER AND TRANSMITTER-RECEIVER 失效
公开(公告)号：JPH10209814A
公开(公告)日：1998-08-07
申请号：JP796397
申请日：1997-01-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： SHIMOZAWA MITSUHIRO , KAWAKAMI KENJI , ITO KENJI
IPC分类号： H03H11/22 , H03H11/36 , H04B1/3822 , H04B1/40
摘要： PROBLEM TO BE SOLVED: To miniaturize the distributor, and to obtain satisfactory isolation characteristics by changing the phase of a high frequency signal by an in-phase power distributor in which the input terminals of plural source follower circuits constituted by using a field effect transistor are connected in a high frequency and plural phase shifting circuits. SOLUTION: An in-phase power distributor 20 constituted of source follower circuits 21 and 22 is constituted of a field effect transistor 23, by-pass capacitor 25, and resistor 26 for bias. Then, a high frequency signal impressed to an input terminals 1 connecting the input terminals of the source follower circuits 21 and 22 with a high frequency is distributed through the in-phase power distributor 20 to co-phase signals with equal amplitude, and outputted to phase shifting circuits 3 and 5. In this case, the phase of a signal passing through the phase shifting circuit 3 as a high pass filter is set so as to be advanced by 45 deg., and the phase of a signal passing through the phase shifting circuit 5 as a low pass filter is set so as to be delayed by 45 deg. so that the phases of the high frequency signals to be outputted to output terminals 4 and 6 can be made different by 90 deg..

88. 发明专利

JPH10200376A RECEIVER AND PHASE SHIFTER 失效
公开(公告)号：JPH10200376A
公开(公告)日：1998-07-31
申请号：JP394997
申请日：1997-01-13
申请人： TOSHIBA CORP
发明人： YAMAJI TAKAFUMI , TANIMOTO HIROSHI
IPC分类号： H03H11/22 , H03H7/18 , H03H11/20
摘要： PROBLEM TO BE SOLVED: To realize a signal distribution phase shifter with high general-purpose and high performance in which an output signal with a phase difference of, e.g., 45 deg., 60 deg. to an input signal other than 90 deg. is obtained. SOLUTION: The signal distribution phase shifter of the receiver is formed by integrating a 1st band pass filter circuit 21 consisting of a plurality of elements and a 2nd band-pass filter circuit 22 where the connection configuration of each component is equal to that of the 1st band-pass filter circuit 21 and the value of each component (constant) differs from that of the 1st band-pass filter circuit 21 on an IC chip. Since a relative error between components is small by forming the components whose circuit structure is the same on the IC chip, the frequency characteristic of the circuit 21 is expressed in parallel displacement of that of the circuit 22 in the entire IC chip, then the receiver with a small error in the frequency characteristic is obtained.

89. 发明专利

JPH09181570A ACTIVE ORTHOGONAL POWER DISTRIBUTOR 失效
公开(公告)号：JPH09181570A
公开(公告)日：1997-07-11
申请号：JP21554496
申请日：1996-08-15
申请人： KOREA ELECTRONICS TELECOMM
发明人： INDOUTSUKU UWAN
IPC分类号： H01P5/12 , H03H11/22 , H03H11/36
摘要： PROBLEM TO BE SOLVED: To easily realize a monolithic microwave chip by providing the active orthogonal power distributor with an input impedance matching circuit, an FET to be turned on/off in accordance with the state of an output signal from the input impedance matching circuit, an output impedance matching circuit for outputting the output signal, and a reactive potential divider. SOLUTION: The output impedance matching circuit is a pi section type consisting of an inducator L3 and capacitors C2, C3 to an output terminal 1. The inductor L3 acts in parallel with an output terminal 2, an inductor L2 acts in series and the capacitors C2, C3 mutually connected in series act in parallel. A direct current(DC) is supplied from a power supply Vdd to an FET Q1 through the inductors L3, L2, a capacitor C5 is a by-pass capacitor and the inductor L3 is grounded like AC. Although the distributor has the same structure as a microwave amplifier, the distributor is also provided with two output terminal and the 90 deg. phase difference of output signals as compared with a conventional distributer.

90. 发明专利

JPH0998067A 90-DEGREE PHASE SHIFTER 失效
公开(公告)号：JPH0998067A
公开(公告)日：1997-04-08
申请号：JP25282295
申请日：1995-09-29
申请人： NEC CORP
发明人： TANAKA TOSHIAKI
IPC分类号： H03H11/22
摘要： PROBLEM TO BE SOLVED: To reduce the chip size of a phase shifter which converts the input signals into the 1st and 2nd differential signals and outputs them after shifting their phases by specific angles, and to reduce the current consumption of the phase shifter. SOLUTION: A 90 deg.-phase shifter consists of a differential amplifier 1 which outputs the 1st and 2nd pairs of differential signals, an LPF 2 which outputs one of both differential signals of the 1st pair after shifting its phase by -45 deg., an LPF 5 which outputs the other differential signal of the 1st pair after shifting its phase by -45 deg., a phase shifter 8 which outputs one of both differential signals of the 2nd pair after shifting its phase by +45 deg., a phase shifter 11 which outputs the other differential signal of the 2nd pair after shifting its phase by +45 deg., and the differential amplifiers 14 and 15 which correspond to the input of the differential signals of the 1st and 2nd pairs respectively.

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