G - Physics – 06 – F
Patent
G - Physics
06
F
354/105, 354/227
G06F 11/00 (2006.01) G08C 25/00 (2006.01) H04L 1/08 (2006.01)
Patent
CA 1084625
s ABSTRACT OF THE DISCLOSURE The system includes an encloding transmitting unit for converting parallel data words into timing pulse synchronized serial data words which are supplied to a transmission channel, and further includes a decoding receiving unit receiving the transmitted serial data words from the transmission channel. The encoding unit comprises a clock-pulse generator and a control circuit connected to a shift register receiving the parallel data words and having a feedback, through an inverter, from a serial work output to an additional input which is a serial work input for the inverted output signal. The shift register transmits a first pulse train representing the serial data work followed by a second pulse train representing the inverted serial data word. The decoding receiving unit includes a second shift register having a serial data work input receiving the two pulse trains from the transmission channels and having a serial data word output. An inverting exclusive OR gate has one input connected to the serial work output of this register and another input receiving the transmitted pulse trains from the transmission channel. This OR gate monitors the non-equivalence of the first and second pulse trains, to detect transmission errors and trans- fer the errors, as error signals, to a flip-flop acting as an error signal storage. A receiving register is connected to the shift register of the receiving unit and is operable to evaluate the transmitted data. The error signal storage, upon receipt of an error signal, prevents such evaluation of the transmitted data in the receiving register. The shift registers of the transmitting and receiving units are syn- chronized by timing pulses. The system may be simplified by using a pulse modulation and may also be used for a pulse duration modulated signal. In the latter case, a synchroni- zation bit is transmitted before each data word. An out- standing feature of the system is that it may be used with a single simple transmission channel. 1a.
244070
J. Eberspacher Gmbh & Co.
Rolston George A.
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