公开(公告)号：DE19881344T1

公开(公告)日：1999-09-09

申请号：DE19881344

申请日：1998-08-14

Applicant: SONY CORP

Inventor： OBATA KATSUYUKU ,  ISHIDA MASAOMI

IPC: G11B25/04 ,  G11B31/00 ,  G11B33/08 ,  G11B33/02 ,  G11B33/12

Abstract: An electronic apparatus for use in recording and/or playing back audio or video signals includes a six-sided housing of which at least a pair of opposite sides are arranged not parallel to each other, and a signal processor unit mounted in the housing and including at least a circuit board which has a degree of rigidity. The circuit board is arranged with its main side facing the non-parallelly arranged, paired opposite sides of the housing. This prevents the generation of resonance between the housing and the circuit board caused by a stress of vibration introduced to the housing and the circuit board, thus hardly allowing the audio or video signals to deteriorate their recording and/or playback properties.

公开(公告)号：JP2002158542A

公开(公告)日：2002-05-31

申请号：JP2000349793

申请日：2000-11-16

Applicant: SONY CORP

Inventor： ISHIDA MASAOMI

IPC: H04R3/00 ,  H03F1/00 ,  H03F3/217 ,  H03K17/08 ,  H03K17/687

Abstract: PROBLEM TO BE SOLVED: To protect an output circuit from an over current without using connection switches. SOLUTION: In the output circuit, which has a serial circuit of first and second switching elements 2a and 2b, a serial circuit of third and fourth switching elements 2c and 2d and a load 6 connected between the connecting midpoint of these first and second switching elements 2a and 2b and the connecting midpoint of these third and fourth switching elements 2c and 2d and drives this load 6 by turning on and off these first, second, third and fourth switching elements 2a, 2b, 2c and 2d, current detecting means 21a, 21b, 21c, 21d and 22 are provided for detecting the respective currents of these first, second, third and fourth switching elements 2a, 2b, 2c and 2d; and when an abnormal current is detected by these current detecting means 21a, 21b, 21c, 21d and 22, all the first, second, third and fourth switching elements 2a, 2b, 2c and 2d are turned off.

公开(公告)号：JPH11265568A

公开(公告)日：1999-09-28

申请号：JP6522298

申请日：1998-03-16

Applicant: SONY CORP

Inventor： MORIOKA SUSUMU ,  MATSUOKA SHOICHIRO ,  OBATA KATSUYUKI ,  ISHIDA MASAOMI

IPC: G11B33/02

Abstract: PROBLEM TO BE SOLVED: To prevent the loss of a disk pressing member by securing a disk pressing member housing place in the casing of a disk recording/reproducing device. SOLUTION: This device is provided with a disk table 4 arranged in a loading part 3 for loading a disk 6 and rotated by a motor 5, a disk pressing member 7 for holding the disk 6 with the disk table 4 to press the same, a recording/ reproducing part for recording/reproducing an information signal or performing both for the disk 6, and a housing part 12 formed in the casing 2 of the disk recording/reproducing device 1 for housing the disk pressing member.

公开(公告)号：JP2000285465A

公开(公告)日：2000-10-13

申请号：JP9356999

申请日：1999-03-31

Applicant: SONY CORP

Inventor： KANAI TAKASHI ,  ISHIDA MASAOMI ,  MATSUTANI KAZUHIRO

IPC: G11B11/10 ,  G11B7/00 ,  G11B7/005

Abstract: PROBLEM TO BE SOLVED: To restrict the deterioration of quality of reproduced data because of magnetization during the reproduction by setting a magnetic field application means for applying a magnetic field to an optical disk in a disk apparatus which can reproduce information recorded on the optical disk. SOLUTION: A coil 22 is set on the side of a record face of an optical disk 1, and arranged adjacently to be opposite to the optical disk 1 and separated from an optical pickup 3 via a rotation center of the optical disk 1. When a switch 24 is turned on, an a.c. is supplied to the coil 22, whereby an alternating field is generated from the coil 22. The alternating field penetrates the optical disk 1. Since the intense alternating field generated from the coil 22 penetrates the optical disk 1 at an area of the optical disk 1 where the coil 22 is set, a degree of magnetization greatly changes in a positive-negative direction, and the optical disk is magnetized to a magnetic saturation point or higher and an effect by a fringing field from the optical pickup 3 or the like can be eliminated.