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1. 发明专利

JP2002074868A DEVICE FOR POSITIONING MAGNETIC HEAD 失效
公开(公告)号：JP2002074868A
公开(公告)日：2002-03-15
申请号：JP2000259913
申请日：2000-08-29
申请人： SONY TEKTRONIX CORP
发明人： MUROOKA RIKICHI
IPC分类号： G11B21/10 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To position the magnetic head to a magnetic disk having a blank servo signal or the like with an inexpensive configuration in inspection of the magnetic disk or the magnetic head. SOLUTION: A blank magnetic disk 16 on which no signal is written is fixed attachably and detachably on a spindle 12. A magnetic disk 14 for servo is a magnetic disk of a data surface servo method on which a known servo signal is written, and is also fixed on the spindle 12. The spindle 12 is rotated by a motor 10. Two heads, a magnetic head 22 to access the blank magnetic disk 16 and a magnetic head 20 for servo to access the magnetic disk 14 for servo, are fixed on a head driving device 18. A control circuit 26 controls the motor 10 and the head driving device 18 according to the servo signal read by the magnetic head 20 for servos accessing the magnetic disk 14 for servo, and thereby, controls the position of the magnetic head 22 to the blank magnetic disk 16. An inexpensive magnetic disk equivalent to a marketed one can basically be used for the magnetic disk 14 for servo.

2. 发明专利

JP2002016577A COMMUNICATION METHOD AND COMMUNICATION UNIT 失效
公开(公告)号：JP2002016577A
公开(公告)日：2002-01-18
申请号：JP2000194715
申请日：2000-06-28
申请人： SONY CORP , SONY TEKTRONIX CORP
发明人： HONDA MAKOTO , FUKUDA KUNIO
IPC分类号： H03M13/41 , H04J11/00
摘要： PROBLEM TO BE SOLVED: To provide a communication unit that can prevent increase in bit errors and to save on required transmission power. SOLUTION: A digital modulation system and a coding rate of an error correction code of a modulation section 102 are varied adaptively with setting information, extracted by a slot decomposition section 116 and set by each subcarrier or each segment. A demodulation section 115 uses the metric value of a Viterbi decoder to decide the modulation system and the coding rate, gives the setting information to a slot synthesis section 101, where a slot is formed with a modulation data bit and the result is given to the modulation section 102. On the basis of time fluctuations of the metric value and its integrated value, an optimum coding rate and an optimum modulation system can be set, while being adapted to a state of a propagation path corresponding to each subcarrier or each segment.

3. 发明专利

JP2001229632A DATA CONVERSION METHOD FOR SWING ARM TYPE HEAD POSITIONING MECHANISM 失效
公开(公告)号：JP2001229632A
公开(公告)日：2001-08-24
申请号：JP2000037491
申请日：2000-02-16
申请人： SONY TEKTRONIX CORP
发明人： WATANABE HIROTO , SUGAYA IKUO
IPC分类号： G11B21/08
摘要： PROBLEM TO BE SOLVED: To specify the position on a disk medium 33 by a radius (d) and a sector number S even when a swing arm type positioning mechanism is used. SOLUTION: The disk medium 33 is rotated and the swing arm 29 is oscillated, by which a head 31 is made to collect the actually measured position data on the dust, defect, etc., on the disk medium 33. The correction rate meeting the radius of the disk medium 33 is applied to this declination data of the actually measured position data, by which the data is converted into the corrected radius data. The correction rate of this time is calculated by applying the cosine theorem relating to the triangle determined by three points; the revolving shaft 10 of the swing arm 29, the center O of the disk medium 33 and the head 31.

4. 发明专利

JP2000182728A COAXIAL MALE CONNECTOR 失效
公开(公告)号：JP2000182728A
公开(公告)日：2000-06-30
申请号：JP35339898
申请日：1998-12-11
申请人： SONY TEKTRONIX CORP
发明人： AOKI KAZUNORI
IPC分类号： H01R24/02
摘要： PROBLEM TO BE SOLVED: To maintain well electric connection of a coaxial male connector and a coaxial female connector 14 even if attachment and detachment are repeated. SOLUTION: In a coaxial connector 12, a central conductor pin 20 is extended and contracted. If the tip of the central conductor pin 20 is brought into contact with the bottom part 28 of a central contact 22 when the coaxial connector 12 is connected to a coaxial female connector 14, a slide pin 20b is compressed while applying contact pressure to the bottom part 28 by resiliency of an inner spring of a central conductor pin main body 20a. Therefore, the tip of the slide pin 20b is brought into pressure-contact with the bottom part 28 of the central contact 22.

5. 发明专利

JP2000171406A DEVICE FOR INSPECTING SURFACE OF DISK AND DEVICE FOR REMOVING PROTRUSION THEREOF 失效
公开(公告)号：JP2000171406A
公开(公告)日：2000-06-23
申请号：JP34759598
申请日：1998-12-07
申请人： SONY TEKTRONIX CORP
发明人： ONISHI YOSHINORI
IPC分类号： B23K26/00 , G01N21/88 , G01N21/95
摘要： PROBLEM TO BE SOLVED: To remove a fine protrusion on the surface of a disk incapable of being removed by a conventional device. SOLUTION: The shape of the surface of a disk 10 is captured as an image due to interference by using a differential interference microscope constituted of an optical detection head 16 and an analyser 22 and this image is converted to an electric signal by a photodiode 28. The position of the protrusion on the surface of the disk 10 is calculated and specified from the output electric signal of the photodiode 28 by an operational control means and the specified protrusion is irradiated with the ultraviolet laser beam from an ultraviolet laser device 42 by using an optical processing head 32 to remove the unnecessary protrusion.

6. 发明专利

JP2000137046A WIDE BAND SIGNAL ANALYZER 失效
公开(公告)号：JP2000137046A
公开(公告)日：2000-05-16
申请号：JP22612399
申请日：1999-08-10
申请人： SONY TEKTRONIX CORP
发明人： NARA AKIRA
IPC分类号： G01R23/16 , G01R23/173
摘要： PROBLEM TO BE SOLVED: To allow the formation of a wide band-ranging at a low cost while restraining the deterioration of a characteristic to the minimum, and to realize an event trigger function. SOLUTION: A FIFO memory 28 stores the second digital signal and reduces its transfer speed. A multiplexer(MPX) 30 outputs selectively either of the first digital signal or an output signal of the memory 28. A DSP 18 FFT-operates an output signal of the MPX 30. A memory 20 stores an operated result of the DSP 18. A trigger detector 32 compares an operated result of the first digital signal by the DSP 18 with a prescribed trigger condition data to generate a trigger signal when a trigger condition is satisfied. A memory controller 34 controls a storing operation for the FIFO memory 28 in response to the trigger signal. A data to be remained in the FIFO memory 28 out of data generated by a wide band signal processing means is thus controlled in response to a trigger function.

7. 发明专利

JP2000027859A LINEAR DRIVING MECHANISM AND ROTARY STAGE DRIVING MECHANISM 失效
公开(公告)号：JP2000027859A
公开(公告)日：2000-01-25
申请号：JP19220998
申请日：1998-07-08
申请人： SONY TEKTRONIX CORP
发明人： YANAGIBASHI SHUNJI
IPC分类号： F16H25/22 , F16C29/02
摘要： PROBLEM TO BE SOLVED: To provide a linear driving mechanism for enabling extremely precise linear moving control with simple constitution. SOLUTION: A linear driving mechanism has a rotary driving means 2, a feed screw 6, a connecting means 20 arranged between the rotary driving means 2 and one end of the feed screw 6, a linear moving nut 12 screwing on the feed screw 6 and swinging holding means 22, 24, 26 for swingably holding the linear moving nut 12. The swinging holding means is composed of a holding means 22, an elastic member 24, and a swingable support member 26.

8. 发明专利

JPH11314184A OPTICAL DEVICE MACHINING APPARATUS 失效
公开(公告)号：JPH11314184A
公开(公告)日：1999-11-16
申请号：JP12091398
申请日：1998-04-30
申请人： NARUKKUSU KK , SONY TEKTRONIX CORP
发明人： TOKUMURA KEIU , JITSUNO TAKAHISA , TAMAMURA HISASHI
IPC分类号： G01B11/24 , B23K26/00 , G01J9/00 , G02B3/00 , H01S3/00
摘要： PROBLEM TO BE SOLVED: To enable easy and highly accurate machining for the surface to be worked even if the optical device has a large wave aberration. SOLUTION: This apparatus is equipped with a laser generator 3, which machines the surface 2 of a workpiece 1 by irradiating it with an ultraviolet laser L of a short wave length, and a shack hartmann wave front instrument 4 which has a lens array with a large number of micro lenses arranged to make the reference beam of a desired characteristic enter the lens array, and which thereby measures the wave front from a difference between the image- forming position of a reference beam emitted from each micro lens by making the reference beam of a desired characteristic enter the lens array and the image-forming position of a measured beam emitted from each micro lens by making the measured beam enter the lens array through the surface 2 to be worked. Then, the irradiation of the ultraviolet laser L is optimally controlled, on the basis of the deviation of the image-forming position of the measured beam, using as a reference the image-forming position of the reference beam obtained from the shack hartmann wave front instrument 4; and, simultaneously, controlled positionally by a controller 6 is the driving mechanism 5 that relatively moves the ultraviolet laser L and the workpiece 1.

9. 发明专利

JPH11304873A TRANSISTOR UNIT CHARACTERISTIC MEASURING METHOD AND DEVICE THEREOF 失效
公开(公告)号：JPH11304873A
公开(公告)日：1999-11-05
申请号：JP11450398
申请日：1998-04-24
申请人： SONY TEKTRONIX CORP
发明人： KATO KATSUHISA
IPC分类号： G01R31/26
摘要： PROBLEM TO BE SOLVED: To actually measure switching characteristics of transistors and translo cation characteristics of diodes in a semiconductor package. SOLUTION: In a first measuring mode, when a second terminal 26 of LU 24 is electrically connected to a second power supply terminal 20 by a switch 27, transistor Tr1 is changed from an on-state into off-state while keeping transistor Tr2 OFF for measuring characteristics of transistor Tr1 and diode D2. In a second measuring mode, transistor Tr2 is changed from on into off- state, while keeping transistor Tr1 off in the condition where the second terminal 26 of LU 24 is connected electrically to a first power supply terminal through the switch 27.

10. 发明专利

JPH11160363A METHOD FOR EDITING WAVEFORM 失效
公开(公告)号：JPH11160363A
公开(公告)日：1999-06-18
申请号：JP33930697
申请日：1997-11-25
申请人： SONY TEKTRONIX CORP
发明人： TAKAI TORU
IPC分类号： G01D9/00 , G01R13/20 , G06G7/30
摘要： PROBLEM TO BE SOLVED: To provide a method for editing waveforms whereby errors in conventional methods for edition of waveforms are eliminated and edited correct waveform data can be generated automatically. SOLUTION: According to a waveform edition method, edited partial waveform data (A-B) are stored in consecutive addresses where partial original waveform data of selected consecutive points among an original waveform data of a plurality of points stored consecutively in order of address in a memory are shifted in a fixed direction. A data value of each address value of a smoothing area of a predetermined range consecutive outward from one end of the edited partial waveform data is obtained. Data of a smoothing edited waveform 60 smoothly connecting a curve of the original waveform data and a curve of the edited partial waveform data is generated accordingly.

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