The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1993
Filed:
May. 23, 1991
Yoshio Nakajima, Higashimurayama, JP;
Akira Shirai, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A reloadable optical recording/reproducing apparatus for reloading data continuously from a recording area of a recording medium, onto which data has been recorded at the preceding recording operation, in accordance with the same modulating rule, the reloadable optical recording/reproducing apparatus comprising: a VFO circuit in which a reading VFO signal is obtained from a read signal obtained from a fact that an optical head scans an optical card; a demodulating circuit for demodulating the read signal and outputting demodulated data; a terminal recognizing device for detecting a synchronizing pattern of the terminal of the recording area, onto which data has been recorded at the preceding recording operation, from the demodulated data and outputting a terminal signal; a delay compensating device for proceeding the phase of the reading VFO signal at the timing defined in accordance with the terminal signal so as to output it as a writing VFO signal; a modulating device for modulating data to be reloaded in accordance with the writing VFO signal; and a laser diode drive circuit for performing reloading by driving the optical head in accordance with the output from the modulating circuit.