Speed controller for recording and playback apparatus
US4943907A · kind A · utility
16Cited by
13References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1987 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | May 8, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0673
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for controlling the operational speed of a peripheral multispeed record/playback device so that the device and a connected computer can communicate at a compatible data rate. When a speed control operation is initiated, the device generates index pulses at a rapid rate. The computer generates a series of n test pulses in response to the generation of the first index pulse. The computer then times how long the n test pulses take to be generated. The peripheral device is then told to run at the data rate represented by how long it took to generate the n test pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.