Pulse or digital communications – Repeaters – Testing
Patent
1980-07-28
1982-11-30
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
329 50, 375 94, 360 44, H04J 306, H04L 700
Patent
active
043618952
ABSTRACT:
A decoder for Manchester encoded data. Each mid-bit transition of the Manchester encoded data is detected and used to activate a counter which counts pulses from a local clock having a pulse rate eight times the data bit rate. The sixth pulse thus occurs at a point one-fourth of a data bit interval after the start of the next data bit interval. At that point the Manchester encoded data is sampled. Since the clock utilized to produce the Manchester encoded data is at a logic level zero at the sampling time, the sampled logic level of the Manchester data is the same as the logic level of the original data. The sampled logic level is used to recreate the original data level, and so the recreated pulse waveform is of the same wave shape as the original data pulse waveform but lags the original by one-fourth a data bit interval.
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patent: 3402264 (1968-09-01), Ellis
patent: 3967061 (1976-06-01), Dobias
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patent: 3980825 (1976-09-01), Morrien
patent: 4080572 (1978-03-01), Hastings et al.
patent: 4112383 (1978-09-01), Burgert
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D. J. Morris, `Code Your Fiber-Optic Data for Speed without Losing Circuit Simplicity`, Oct. 25, 1978, Electronic Design, vol. 27, No. 5, pp. 110-116.
Norton, J. J., `Drop Your Costs, but not Your Bit with Manchester-Data Decoder`, Jul. 19, 1979, Electronic Design, vol. 27, No. 15, pp. 110-116.
Chin Stephen
Ontel Corporation
Safourek Benedict V.
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