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. 10, 1982
Filed:
Mar. 05, 1980
Youji Sugiura, Gifu, JP;
Satoshi Nishimura, Kagamihara, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A circuit for demodulating either an MFM (modified frequency modulated) or an FM (frequency modulated) self-clocking-information signal is adapted to measure a time period corresponding to a signal reversion period and quantize the measured time period, whereby the quantized output determines a signal reversion period. Pulses of the number corresponding to the quantized output are generated and clock pulses for demodulating the original data are regenerated based on the above described pulses. In the case where the self-clocking-information signal is MFM, the original data is demodulated by reading the data regenerated based on the said pulses of the number corresponding to the quantized output based on the regenerated clock pulses. In the case where the self-clocking-information signal is FM, the original data is demodulated by reading the specified quantized output based on the above described regenerated clock pulses.