公开(公告)号：CA1270946A

公开(公告)日：1990-06-26

申请号：CA514294

申请日：1986-07-21

Applicant: SONY CORP

Inventor： NISHIMURA KAZUHISA ,  YOSHIHIRO MITSUGU ,  SAKAI MASAAKI ,  HATAOKA SEIICHI

IPC: G11B15/46 ,  G11B15/18 ,  G11B15/28 ,  G11B15/467

Abstract: A capstan servo system for a video tape recording and/or reproducing apparatus permits recording of a new video signal precisely commenced at a selected edit point. For this, the capstan servo system is provided a tape speed error dependent feedback control feature and a phase error dependent feedback control feature. Tape speed error dependent feedback control is carried out when the recording and/or reproducing apparatus operates in recording or assemble edit mode. Phase error dependent feedback control is carried out when the recording and/or reproducing apparatus operates in reproducing or playback mode.

公开(公告)号：CA1171168A

公开(公告)日：1984-07-17

申请号：CA386829

申请日：1981-09-28

Applicant: SONY CORP

Inventor： TAKANO MASAYUKI ,  SAKAI MASAAKI ,  ENOKI MASAHARU

IPC: H04N5/7826 ,  G11B27/02 ,  G11B27/028 ,  G11B27/029 ,  H04N5/78

Abstract: 38/SO1470 S81P158 Insert and assemble editing of video signals are carried out using a VTR having helically scanning rotary record/playback heads. Following the recording of a first video signal in slant tracks on the tape, the tape is stopped at an edit point where recording of a second video signal is to commence. Then the tape is run reversely while control signals associated with the locations of the tracks are reproduced. These control signals are counted and the tape is stopped when a predetermined number of such signals have been counted. Thereafter the tape is advanced to a noiseless-still-picture position, based on a counted number of oscillations associated with rotation of the tape capstan, at which an acceptably noisefree picture is obtained, notwithstanding that the head scan of the rotary heads does not completely concide with the slant tracks when the tape is stopped. After this, the tape is run at normal speed, and when the tape reaches the edit point, the VTR begins to record the second signal, which is at that time in step with the previously-recorded first video signal.

公开(公告)号：DE2516758A1

公开(公告)日：1975-10-30

申请号：DE2516758

申请日：1975-04-16

Applicant: SONY CORP

Inventor： NINOMIYA TAKESHI ,  SAKAI MASAAKI ,  SUZUKI KIYOSUKE

IPC: H02P25/04 ,  G05F1/44 ,  G05F1/445 ,  H01L21/331 ,  H01L29/00 ,  H01L29/73 ,  H02P21/05 ,  H02P23/04 ,  H02P27/02 ,  H03C1/36 ,  H03G1/00 ,  H01L29/72 ,  H02P13/28

Abstract: 1500149 Control of AC motors SONY CORP 14 April 1975 [16 April 1974] 15242/75 Heading H2J A load 14, such as an AC motor, is controlled by a bidirectional, low emitter concentration (LEC), transistor 13 of the type described and claimed in Specifications 1,455,260 and 1,460,037, the impedance of the transistor being varied to vary the amplitude of current from an A.C. source 15 in accordance with a variable current source 12, which controls the base-emitter current of transistor 13 and consists of conventional transistors 18, 21, resistors 17, 19, 20 and a variable voltage source 22. Typical examples of the transistor 13 are described, Figs. 1 and 2 (not shown) and its operation is compared with that of a conventional variable impedance transistor, Fig. 4 (not shown), it being explained how the symmetrical impedance of transistor 13, for the alternate polarities of the source 15, provides a symmetrical sine wave load current in contrast to the asymmetrical current produced by the conventional transistor. Other advantages of transistor 13 are a high uniform gain, an improved overload resistance and a reduction of motor noise compared with the known control using a diode bridge with unidirectional current through a transistor. For higher voltates of source 15, the transistor 13 is replaced by two similar LEC transistors (24, 25) connected in series and having their bases connected to the source 12 through a potentiometer (23) adjustable to balance the transistor base currents, Fig. 5 (not shown).

公开(公告)号：CA1174329A

公开(公告)日：1984-09-11

申请号：CA368392

申请日：1981-01-13

Applicant: SONY CORP

Inventor： SHINKAI MITSUTOSHI ,  SAKAI MASAAKI ,  NAKANO KENJI ,  NAKAMURA TADAHIKO

IPC: G11B5/02 ,  G11B5/09 ,  G11B27/10

Abstract: Digitally designed vertical synchronizing separator and framing circuit are disclosed in association with a digital servo LSI for a video tape recorder. These circuits are particularly designed to be noise-free system for a composite synchronizing signal reproduced from the video tape recorder and utilize a reference clock pulse with the synchronizing signal and a counter means with means to feed back the contents of the counter to control the supply of said composite synchronizing signal.

公开(公告)号：DE3122828A1

公开(公告)日：1982-06-16

申请号：DE3122828

申请日：1981-06-09

Applicant: SONY CORP

Inventor： SAKAI MASAAKI ,  YOSHIHIRO MITSUGU

IPC: C07C2/42 ,  C07C45/00 ,  C07C45/42 ,  C07C45/46 ,  C07C45/49 ,  C07C45/51 ,  C07C45/56 ,  C07C47/546 ,  C07C49/792 ,  C11B9/00 ,  H02P3/10 ,  H02P6/24 ,  H02P3/08

Abstract: A stop control circuit for a DC motor causes the motor to stop precisely by purely electrical action. A DC motor is provided with a bidirectional driving circuit, a servo circuit for controlling the driving circuit, and a rotation detector associated with the motor shaft to provide a phase signal that depends, in magnitude and polarity, on the particular rotational angle of the shaft, regardless whether the motor is turning. A stop control circuit then includes an amplifier whose output varies according to the phase signal, and a switch that normally provides the servo signal to the driving circuit, but, upon command, switches over to provide thereto the output of the amplifier as a brake signal. Alternatively the rotation detector can include two sensor elements separated by pi /2, and the stop control circuit can include an inverting amplifier, a non-inverting amplifier coupled to one of the sensor elements, and a switch circuit with inputs coupled respectively to these amplifiers. A comparator provides a switch signal to the switch circuit in dependence on the phase signal from the other sensor element. In another embodiment, a differential amplifier provides a brake signal in dependence upon both the phase signals from the two sensor elements.

公开(公告)号：AU7594081A

公开(公告)日：1982-04-08

申请号：AU7594081

申请日：1981-10-01

Applicant: SONY CORP

Inventor： TAKANO MASAYUKI ,  SAKAI MASAAKI ,  ENOKI MASAHARU

IPC: H04N5/7826 ,  G11B27/02 ,  G11B27/028 ,  G11B27/029 ,  G11B15/20

Abstract: Insert and assemble editing of video signals are carried out using a VTR having helically scanning rotary record/playback heads. Following the recording of a first video signal in slant tracks on the tape, the tape is stopped at an edit point where recording of a second video signal is to commence. Then the tape is run reversely while control signals associated with the locations of the tracks are reproduced. These control signals are counted and the tape is stopped when a predetermined number of such signals have been counted. Thereafter the tape is advanced to a noiseless-still-picture position, based on a counted number of oscillations associated with rotation of the tape capstan, at which an acceptably noise-free picture is obtained, notwithstanding that the head scan of the rotary heads does not completely coincide with the slant tracks when the tape is stopped. After this, the tape is run at normal speed, and when the tape reaches the edit point, the VTR begins to record the second signal, which is at that time in step with the previously-recorded first video signal.

公开(公告)号：DE3048539A1

公开(公告)日：1981-09-17

申请号：DE3048539

申请日：1980-12-22

Applicant: SONY CORP

Inventor： SHINKAI MITSUTOSHI ,  SAKAI MASAAKI ,  NAKANO KENJI ,  NAKAMURA TADAHIKO

IPC: G11B15/60 ,  G11B27/024 ,  H04N5/10 ,  H04N5/782

公开(公告)号：CA1069442A

公开(公告)日：1980-01-08

申请号：CA270716

申请日：1977-01-31

Applicant: SONY CORP

Inventor： SATO TORU ,  TOKUMITSU SHUNJI ,  SAKAI MASAAKI ,  KAWASAKI KAZUHIKO ,  KAIMORI KENICHIRO ,  OSAWA MITSUO

IPC: G11B3/095 ,  G11B19/20 ,  G11B3/08 ,  G11B17/06

Abstract: A record player having single lever presetting control for manual and repeat operation. The record player has tonearm locking when a final repeat cycle has been terminated. A repeat designating lever and an operating member for operating the designating lever per repeat cycle, while the operating lever engages the repeat designating lever only for a given period of time. A feed member is urged in one direction under the action of a spring, is secured to a repeat feed level reciprocable in response to one cycle of notation of a drive gear driven in association with rotation of a turn-table, while the feed member is so designed as to engage a tooth cam of a repeat feed plate which stores a repeat cycle commensurate with an extent of its displacement, before the completion of one cycle of rotation of the drive gear, thereby causing a given extent of displacement of the saw tooth cam, with the result that the number of parts may be reduced and the count-down of a repeat memory may be readily accomplished by an arbitrary operation of a single modeshifting rod.

公开(公告)号：FR2472893B1

公开(公告)日：1986-06-20

申请号：FR8027356

申请日：1980-12-23

Applicant: SONY CORP

Inventor： SHINKAI MITSUTOSHI ,  SAKAI MASAAKI ,  NAKANO KENJI ,  NAKAMURA TADAHIKO

IPC: G11B15/60 ,  G11B27/024 ,  H04N5/10 ,  H04N5/91

公开(公告)号：DE3030861A1

公开(公告)日：1981-03-26

申请号：DE3030861

申请日：1980-08-14

Applicant: SONY CORP

Inventor： ASAGI OSAMU ,  SAKAI MASAAKI

IPC: G11B15/18 ,  H02M7/48 ,  H02P5/68 ,  H02P7/68

Abstract: Two DC motors are driven by switching pulse drive circuits, and the switching on times of drive pulses are made to be out of phase with each other at the two switching pulse drive circuits. One of the two DC motors rotates rotary video heads, and the other drives a capstan of a video tape recording and/or reproducing apparatus. The drive pulses are preferably synchronized with horizontal synchronizing pulses of a video signal to be handled by the video tape recording and/or reproducing apparatus in order to avoid pulse noises.