Receiver for simultaneously transmitted clock and auxiliary sign

Details Receiver for simultaneously transmitted clock and auxiliary sign Receiver for simultaneously transmitted clock and auxiliary sign

1979-05-25

1981-06-30

Atkinson, Charles E.

Excavating

340508, 371 68, G06F 1118

Patent

active

042766451

ABSTRACT:
A receiver for simultaneously transmitted clock signals of frequency F (HC) and auxiliary signals of frequency f (HS), F=kf, k=2, 3, 4, . . . , said clock and auxiliary signals being transmitted as a modified clock signal (HM) wherein one clock pulse is omitted every k clock pulses. The modified clock signal is simultaneously transmitted over three, nominally identical, transmission circuits (e.g. as HM1, HM2, & HM3). The receiver comprises the combination of a selection circuit (1) for generating a normal modified clock signal (H), even if one of the three received modified clock signals should be absent, and a signal separation circuit (2) for reconstituting both the clock signals (HC) and the auxiliary signals (HS). The receiver further includes an alarm circuit promptly detects transmission failures or impairments, even though the main portion of the circuit continues to operate properly.

REFERENCES:
patent: 3226569 (1965-12-01), James
patent: 3356837 (1967-12-01), Raymond
patent: 3526837 (1970-09-01), Zegers et al.
patent: 3665173 (1972-05-01), Bouricius et al.
patent: 3848116 (1974-11-01), Moder et al.
patent: 3859513 (1975-01-01), Chuang et al.
patent: 4015246 (1977-03-01), Hopkins, Jr. et al.
patent: 4081790 (1978-03-01), Yamamoto et al.

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