Stanley H Frimet

US Patent:

43822681, May 3, 1983

Filed:

Oct 20, 1980

Appl. No.:

6/198936

Inventors:

Stanley H. Frimet - Englewood CO

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G11B 1546

US Classification:

360 73

Abstract:

A tape transport speed control uses a speed controller supplied with packing density or digital bits per inch of recording medium and data rate or digital bits per second to compute the speed of the tape which would conform to these selected parameters by the speed being equal to the data rate divided by the packing density. The speed controller uses a combination of digital and analog circuits to produce a reference signal and a speed select signal for the tape transport speed control operation using a comparison between the reference signal and a tachometer signal to control the tape transport about the basic selected tape speed.

US Patent:

44096283, Oct 11, 1983

Filed:

Nov 16, 1981

Appl. No.:

6/321365

Inventors:

Stanley H. Frimet - Englewood CO
Leighton A. Meeks - Littleton CO

Assignee:

Honeywell, Inc. - Minneapolis MN

International Classification:

G11B 1552

US Classification:

360 73

Abstract:

A tape transport speed control uses a synthesized clock signal primarily derived from playback data signals in a preselected primary data track. Data signal drop-out in the primary data track used to produce the synthesized clock signal is monitored by a digital logic circuitry which is effective to borrow secondary derived clock signals from an adjacent data track on the same tape. The borrowed secondary synthesized clock signals are used during the drop-out interval on the primary data. The handover of the borrowed clock signals from the adjacent track and the return to the clock signals derived from the primary track is performed automatically by a sensing of the start and end of the drop-out.