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Serial Data Transmission Disclosure Number: IPCOM000065426D
Original Publication Date: 1985-Dec-01
Included in the Prior Art Database: 2005-Feb-19

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Fredericks, KJ Skarshinski, L Wiegand, MR [+details]


This method of transmitting serial data, converts true serial data into serial data with periodic transitions, thus allowing the extraction of a stable clock signal. This clock with the same frequency as the master clock is necessary to transmit the serial data over a parallel interface. The serial data must have periodic transitions in order to generate the required clock. This is accomplished by converting the true serial data to bi-frequency serial data utilizing a system master clock with a frequency twice that of the desired data rate. The circuitry used is shown in Fig. 1 where gate A, acting as a toggle flip-flop, generates a clock signal with a frequency one-half that of the system master clock.