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1. 实用新型

JP2607847Y2 失效
公开(公告)号：JP2607847Y2
公开(公告)日：2003-03-31
申请号：JP2002001904
申请日：2002-04-05
IPC分类号： H03D7/00 , H03J7/00 , H03J7/02 , H04B1/10 , H04B1/16 , H04B7/005 , H04B17/00 , H04L27/10 , H04L27/38

2. 实用新型

JP2002000023U 失效
公开(公告)号：JP2002000023U
公开(公告)日：2002-10-25
申请号：JP2002001904
申请日：2002-04-05
IPC分类号： H03D7/00 , H03J7/00 , H03J7/02 , H04B1/10 , H04B1/16 , H04B7/005 , H04B17/00 , H04L27/10 , H04L27/38 , H04L27/227

3. 发明专利

JP2000223901A HIGH-FREQUENCY SWITCH 失效
公开(公告)号：JP2000223901A
公开(公告)日：2000-08-11
申请号：JP1866299
申请日：1999-01-27
申请人： MURATA MANUFACTURING CO
发明人： KATOU MITSUHIDE
IPC分类号： H01P1/10 , H01P1/15 , H03J7/00 , H04B1/44 , H04B1/48
摘要： PROBLEM TO BE SOLVED: To manage with only a small capacitance and small sized bias cutting capacitor which is connected to a reception terminal side by eliminating the need for a conventional large capacitance and large size bias cutting capacitor connected to a transmission terminal side. SOLUTION: The cathode of a diode D11 is connected to a transmission terminal Tx. The cathode of the diode D11 is grounded through a transmission line 12. The anode of the diode D11 is connected to an antenna terminal ANT. The antenna terminal ANT is connected to a reception terminal Rx through a transmission line 13. The cathode of a diode D12 is connected to the reception terminal Rx. The anode of the diode D12 is grounded through a capacitor C12.

4. 发明专利

JP3015004B2 失效
公开(公告)号：JP3015004B2
公开(公告)日：2000-02-28
申请号：JP19328298
申请日：1998-07-08
IPC分类号： H04N5/44 , H03D7/16 , H03H7/12 , H03J5/24 , H03J7/00 , H04B1/18

5. 发明专利

JPH10190629A SWEEP LIGHT FREQUENCY GENERATING DEVICE 失效
公开(公告)号：JPH10190629A
公开(公告)日：1998-07-21
申请号：JP34625096
申请日：1996-12-25
申请人： ANDO ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： NOGIWA SEIJI , IIDA CHIKAHIRO , AIDA KAZUO , MASUDA KOJI
IPC分类号： G02B6/024 , H03J7/00 , H04B10/2513 , H04B10/2569 , H04B10/293 , H04B10/40 , H04B10/50 , H04B10/564 , H04B10/572 , H04B10/60 , H04J14/00 , H04J14/02 , G02B6/17 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide the sweep light frequency generating device which can output a light pulse signal train with stable light intensity. SOLUTION: A polarization holding fiber is used to connect constituent components in a optical loop circuit 200 to one another, and the axis of birefringence of the polarization holding fiber is aligned with the axis of polarization of a light pulse signal (circulating in the optical loop circuit 200). Consequently, the light pulse signal can circulate while maintaining specific linear polarization. Therefore, even when a component which has polarization dependency loss characteristics is present in the optical loop circuit 200, the light pulse signal train with stable light intensity can be outputted. Further, an odd number of places where the axis of birefringence of the polarization holding fiber tilts relatively at 90 deg. are prepared at arbitrary positions in the optical loop circuit 200. Accordingly, the polarized wave of the light pulse signal can be crossed at right angles every time it circulates, polarization mode dispersion is canceled every time it circulates, and the ripple of the output (light pulse signal train) is suppressed.

6. 发明专利

JPH10150339A IMPEDANCE MATCHING DEVICE AND ITS CONTROL METHOD 失效
公开(公告)号：JPH10150339A
公开(公告)日：1998-06-02
申请号：JP29902497
申请日：1997-10-30
申请人： HYUNDAI ELECTRONICS IND
发明人： RI SOCHIN
IPC分类号： G01R27/06 , H03H7/075 , H03H7/38 , H03H11/28 , H03J7/00 , H04B1/04
摘要： PROBLEM TO BE SOLVED: To provide an impedance matching device and its control method that are capable of impedance matching against a frequency change for enabling the single device to fully conduct the matching function against more diversified frequencies. SOLUTION: After an input frequency is inputted to a standing wave ratio detection part 3 and a load side resistance detection part 4 via a directional coupler 1, the input frequency is inputted to a microprocessor 5. After a standing wave ratio and a phase or the like to the frequency are measured, the microprocessor 5 reads the values. After a circuit integer value of a matching circuit part 7 is calculated, the matching circuit part 7 is operated with the calculated value to conduct the signal matching function against the frequency and impedance matching is attained against a frequency change.

7. 发明专利

JPH09107296A WIRELESS MICROPHONE TRANSMITTING/RECEIVING EQUIPMENT 失效
公开(公告)号：JPH09107296A
公开(公告)日：1997-04-22
申请号：JP26272395
申请日：1995-10-11
申请人： TOSHIBA CORP
发明人： KAWANABE KAZUE
IPC分类号： H03J7/00 , H04B1/04 , H04B1/38
摘要： PROBLEM TO BE SOLVED: To considerably improve the operability of an equipment by very easily tuning the frequency of an FM signal wave used for transmission/ reception without a burden to a user. SOLUTION: A microcomputer 13 of a reception circuit controls a PLL tuning circuit 12 to automatically set the reception frequency of an FM tuner 2 to an idle frequency. A mixer 14 transmits the pilot carrier, which has the frequency slightly deviated from the set reception frequency, from an antenna 1. When a tuning circuit 10 of a transmission circuit is tuned to the vicinity of the reception frequency once by manual operation, the AFC loop for pilot carrier reception consisting of an FM tuner 18, an amplifier 19, a band pass filter 20, an FM detection circuit 21, the tuning circuit 10, a carrier oscillation circuit 9, a mixer 16, and the FM tuner 18 is formed. The carrier oscillation circuit 9 oscillates with the reception frequency based on frequency information of the pilot carrier, and a modulation circuit 8 transmits an FM transmission wave having the same frequency as the reception frequency.

8. 发明专利

JPH04229734A RECEIVER COMPOSED OF APPARATUS EVALUATING FREQUENCY TRANSITION 失效
公开(公告)号：JPH04229734A
公开(公告)日：1992-08-19
申请号：JP9245791
申请日：1991-04-23
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： BAIER ALFRED DR-ING
IPC分类号： H03D7/00 , H03J7/00 , H03J7/02 , H04B1/10 , H04B1/16 , H04B7/005 , H04B17/00 , H04L27/10
摘要： PURPOSE: To automatically control a local oscillation frequency for correcting a frequency shift by an analog or digital signal processing means by continuously monitoring the phase shift to limit adverse effects on a transmission performance of the frequency shift of a receiver. CONSTITUTION: A reception signal is converted into an intermediate frequency ZF in an HF reception part 10 and is detected by an orthogonal detector 15 to become base-band orthogonal components I and Q, and they are applied to an adaptive channel evaluator 30, an interference power evaluator 40, and an equalizer detector 50. The channel evaluator 30 evaluates a channel impulse response and is applied to the equalizer detector 50 for obtaining evaluation and an output (b) of orthogonal components. In parallel with this operation, outputs of the interference power evaluator 40 and the channel evaluator 50 are applied to a frequency shift evaluator 20. Input data is weighted there and is evaluated statistically to determined the frequency shift, and this output is applied to an IF oscillator 13 of the HF reception part 10 to control the oscillation frequency.

9. 发明专利

JPH02135910A ELECTRONIC TUNER 失效
公开(公告)号：JPH02135910A
公开(公告)日：1990-05-24
申请号：JP29088088
申请日：1988-11-17
申请人： ALPINE ELECTRONICS INC
发明人： NAMEKAWA MAKOTO
IPC分类号： H03J5/02 , H03J7/00
摘要： PURPOSE:To perform channel selection in sequence of a channel selected usually by reading out frequency data in a first memory in sequence of higher frequency in use stored in a second memory when a channel selection key is operated, and performing the channel selection based on the frequency data. CONSTITUTION:The frequency data of the channel from which music is selected is written sequentially in the first memory B1 at every operation of channel selection by a user, and also, reception frequency (for example, the time in use of the frequency data) of the channel is written sequentially on the second memory B2. When the channel selection key such as a seek key 16, etc., is operated, the frequency data is read out in sequence of higher frequency in use stored in the second memory B2, and the channel selection is performed based on read out frequency data. In such a way, it is possible to perform the channel selection in sequence of the channel selected usually.

10. 发明专利

JPH026025B2 失效
公开(公告)号：JPH026025B2
公开(公告)日：1990-02-07
申请号：JP13072280
申请日：1980-09-22
申请人： HITACHI LTD
发明人： IENAKA MASANORI
IPC分类号： H03J7/18 , G01R19/04 , H03D1/18 , H03J7/00

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