| Patent Number |
Title Of Patent |
Date Issued |
| 5406425 |
ISO/IEC compatible digital audio tape digital data storage system with increased data transfer r |
April 11, 1995 |
| The present invention provides a complete digital data storage (DDS) magnetic tape system for utilization with a host unit. The invention comprises a host device interface for interfacing the host unit with the DDS system, a controller/formatter for encoding and decoding data from and |
| 5398140 |
Digital data tape storage automatic track follower system |
March 14, 1995 |
| An automatic track follower (ATF) system for accurately positioning the read/write head on the tracks of a magnetic tape comprises a pilot signal generator for generating pilot signals from tape pilot marks; a sample-and-hold circuit for sampling the pilot signals from the tracks imm |
| 5359468 |
Digital data storage tape formatter |
October 25, 1994 |
| In a digital data storage audio tape system having a host device interface unit, a main data buffer manager, a main data buffer, a processor, a data separator, a tape drive unit, and a read/write channel, this invention comprises a formatter providing track construction, encoding and dec |
| 5309300 |
Beginning/end of tape detection system |
May 3, 1994 |
| This invention is a beginning-of-tape/end-of-tape detection apparatus and method for use in a tape drive system having supply reel, take-up reel, and capstan motion sensors. The invention comprises monitoring means for monitoring each of the angular position signals and processor means f |
| 5287478 |
Digital data tape storage system utilizing plurality of read/write heads with system diagnostic |
February 15, 1994 |
| A complete digital data storage magnetic tape system for utilization with a host unit comprising a host device, an interface for interfacing the host unit with the DDS system, a controller for encoding and decoding data to and from the magnetic tape, an automatic track follower for perfo |
| 5287233 |
Digital data storage magnetic tape system comprising a single chip processor to control a tape t |
February 15, 1994 |
| This invention is an improved digital data storage magnetic tape transport servo-control system comprising a tape supply reel and supply reel motor, a tension transducer, a head drum having at least one read/write head secured thereto and coupled to a head drum motor, a capstan and a cap |
| 5243473 |
Automatic helical scan head drum calibration and track timing generation |
September 7, 1993 |
| This invention is a method and apparatus for the automatic calibration of the magnetic head offset angles in a helical scan rotating head drum and the generation of idealized track timing for recording and reading magnetic tape. A calibration tape is used to provide calibration marks and |
| 5177417 |
Method and apparatus for commutation of a brushless dc motor |
January 5, 1993 |
| An apparatus and method for the commutation of a brushless dc motor having a rotor and a plurality of coils, and an encoder generating quadrature signals responsive to the rotation of the rotor. The commutation apparatus comprises a commutation control device, coupled to the encoder, for |
| 5173817 |
Tape engagement mechanism for magnetic cassette tape incorporating a bi-directional over running |
December 22, 1992 |
| A mechanism for registering the tape contained within a cassette around a helical-scan head drum mechanism includes a sensor for sensing the presence of the tape cassette in a proper position for beginning the process of engagement of the tape in the cassette with the head assembly i |
| 5025333 |
Tape engagement mechanism for magnetic cassette tape |
June 18, 1991 |
| A mechanism for registering the tape contained within a cassette around a hellical-scan head drum mechanism includes means for sensing the presence of the tape cassette in a proper position for beginning the process of engagement of the tape in the cassette with the head assembly in the |
