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Class Information
Number: 360/77.17
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track centering > Elongated web carrier (i.e., tape) > Transverse scan path > Having head deflection drive (e.g., piezoelectric bimorph) > Dithering
Description: Subject matter in which a low amplitude A.C. signal is applied to the transducer head deflection drive.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7064913 |
Enhanced read margining using dither enhanced write marginalization for mass data storage applications |
Jun. 20, 2006 |
| 7019931 |
Tape drive apparatus |
Mar. 28, 2006 |
| 6507449 |
Digital servo demodulator with synchronous dithering and method |
Jan. 14, 2003 |
| 5654842 |
Head displacement measuring method and apparatus and data recording/reproducing method and apparatus |
Aug. 5, 1997 |
| 5602690 |
Clock signal generating device and clock signal generating method |
Feb. 11, 1997 |
| 5566378 |
Movable head position controlling device for magnetic recording and reproducing apparatuses |
Oct. 15, 1996 |
| 5463506 |
Head drum apparatus |
Oct. 31, 1995 |
| 5448367 |
Apparatus for automatically controlling generation of a head switching signal |
Sep. 5, 1995 |
| 5331480 |
Dynamic tracking reproduction apparatus |
Jul. 19, 1994 |
| 5157563 |
Magnetic recording and reproducing apparatus using an electromagnetic actuator for automatic tracking |
Oct. 20, 1992 |
| 4970611 |
Variable tape speed head-carrier drum control apparatus |
Nov. 13, 1990 |
| 4935827 |
Dynamic head position tracking control for a magnetic tape playback system |
Jun. 19, 1990 |
| 4918546 |
Tracking control devices for video tape recorders |
Apr. 17, 1990 |
| 4760471 |
System and method to improve picture quality during shuttling of video tapes |
Jul. 26, 1988 |
| 4663555 |
Method and apparatus for controlling a bimorph leaf which supports a deflectable head |
May. 5, 1987 |
| 4595960 |
Phase-reversed dithered automatic scan tracking system |
Jun. 17, 1986 |
| 4550351 |
Adaptive automatic scan tracking system |
Oct. 29, 1985 |
| 4549234 |
Method and apparatus for tracking control |
Oct. 22, 1985 |
| 4544967 |
Automatic scan tracking servo system |
Oct. 1, 1985 |
| 4539603 |
Video signal reproducing device |
Sep. 3, 1985 |
| 4494153 |
Method of operating a signal reproduction apparatus for effecting synchronous reproduction of recorded signals |
Jan. 15, 1985 |
| 4486796 |
Apparatus and method for controlling the position of a rotary head |
Dec. 4, 1984 |
| 4471392 |
Automatic scan tracking with ringing control |
Sep. 11, 1984 |
| 4445146 |
Digital tracking control system for video tape reproducing apparatus |
Apr. 24, 1984 |
| 4420778 |
Head tracking control system for a helical scan VTR |
Dec. 13, 1983 |
| 4404605 |
Head tracking control system |
Sep. 13, 1983 |
| 4402022 |
Tracking control system in a magnetic reproducing apparatus |
Aug. 30, 1983 |
| 4389686 |
Tracking apparatus for use in a video tape recorder |
Jun. 21, 1983 |
| 4370685 |
Head tracking control system for a helical scan VTR |
Jan. 25, 1983 |
| 4361857 |
Automatic head tracking system |
Nov. 30, 1982 |
| 4327384 |
Rotary head type magnetic tape recording reproducing apparatus |
Apr. 27, 1982 |
| 4319289 |
Movable head automatic position acquisition circuit and method |
Mar. 9, 1982 |
| 4318142 |
Automatically compensated movable head servo circuit and method |
Mar. 2, 1982 |
| 4287538 |
Magnetic head tracking control system |
Sep. 1, 1981 |
| 4285017 |
Stripe following in a helical scan device |
Aug. 18, 1981 |
| 4255771 |
Video signal reproducing apparatus |
Mar. 10, 1981 |
| 4255768 |
Tracking control apparatus for a rotary head, variable speed signal reproducing system |
Mar. 10, 1981 |
| 4251838 |
Auto-tracking control system for use in apparatus for reproducing a video signal recorded in successive parallel tracks on a recording medium |
Feb. 17, 1981 |
| 4229773 |
Video signal recording system with automatic head positioning |
Oct. 21, 1980 |
| 4223358 |
Method and apparatus for cancelling the remanent deflection in a _piezoceramic head support means of a video recorder |
Sep. 16, 1980 |
| 4215362 |
Track selection method and apparatus |
Jul. 29, 1980 |
| 4197564 |
Automatically calibrated RF envelope detector circuit |
Apr. 8, 1980 |
| 4172265 |
Automatic head tracking system |
Oct. 23, 1979 |
| 4163994 |
Automatic head tracking system utilizing transducer deflecting means and synchronous demodulation of the envelope signal |
Aug. 7, 1979 |
| 4151570 |
Automatic scan tracking using a magnetic head supported by a piezoelectric bender element |
Apr. 24, 1979 |
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