Speed controller for recording and playback apparatus

Details Speed controller for recording and playback apparatus Speed controller for recording and playback apparatus

1987-05-08

1990-07-24

Shaw, Gareth D.

Boots, shoes, and leggings

3642384, 3642481, 3642706, G06F 100

Patent

active

049439073

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.

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patent: 4527236 (1985-07-01), Ermolovich
patent: 4591933 (1986-05-01), Quackenbush

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