H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/74
H04L 7/00 (2006.01) G11B 20/10 (2006.01) G11B 20/14 (2006.01)
Patent
CA 1186766
ABSTRACT OF THE DISCLOSURE A data reading apparatus for data transmission, for reading digital data from a digital signal series obtained by comparing the level of an incoming transmission signal obtained through a transmission path with a reference level at a detector, comprises a reference clock pulse generator for generating a reference clock pulse having a period equal to substantially 1/M (M is an integer greater than or equal to two) of a transmission digit period of the digital signal series, a detecting circuit supplied with the digital signal series and the reference clock pulse generated by the reference clock pulse generator, for generating a level variation detection pulse in phase synchronism with level varying points corresponding to rising edges and/or falling edges of the digital signal series, a frequency dividing circuit reset by the level variation detection pulse from the detecting circuit, for generating a data reading timing clock pulse with a period substantially equal to the digit period of the digital signal series and with a phase delayed with respect to the level variation detection pulse by frequency-dividing the reference clock pulse from the reference clock pulse generator, and a data reading circuit for obtaining a data reading output signal by latching the digital signal series by the data reading timing clock pulse obtained from the frequency dividing circuit.
407380
Marks & Clerk
Victor Company Of Japan Ltd.
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