Information recording and reproducing apparatus having switching

Details Information recording and reproducing apparatus having switching Information recording and reproducing apparatus having switching

1988-07-20

1990-08-28

Stephan, Steven L.

Registers

Coded record sensors

Feed mechanisms

235476, 235454, G06K 1304, G06K 1308

Patent

active

049527860

ABSTRACT:
An information recording and reproducing device includes a head for recording and reproducing information on and from a recording medium, a drive for reciprocally driving the recording medium relative to the recording and reproducing head at a faster speed in a reproducing mode than in a recording mode, a frequency signal producer for producing a frequency signal representing a drive speed of the recording medium, a first control for comparing an output signal of the frequency signal producer with a reference clock signal and feeding a phase error therebetween back to the drive, a second control for detecting the drive speed of the recording medium and feeding a signal representing an error between the detected drive speed and a target speed back to the drive and a switching device for activating at least the first control in the recording mode and deactivating the first control and activating the second control in the reproducing mode.

REFERENCES:
patent: 4167023 (1979-09-01), Bessette et al.
patent: 4330196 (1982-05-01), Yamaguchi
patent: 4390905 (1983-06-01), Tokitsu
patent: 4639649 (1987-01-01), Seto
patent: 4698703 (1987-10-01), Nishimura et al.
patent: 4815062 (1989-03-01), Suzuki
patent: 4831243 (1989-05-01), Enari et al.

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