| 摘要 |
1,042,423. Transistor pulse circuits. W. J. MORLEY, and R. M. GARRETT. Feb. 12, 1964 [March 4, 1963], No. 5826/64. Heading H3T. [Also in Division G4] Transmitter and receiver portions of a system for communication along a pair of lines are decoupled, and the receiver portion incorporates redundancy. Referring to Fig. 6 (not shown), a negative input pulse at X is sent through a series of transistor amplifying stages 205 to 209 to a transmission line 15n, and also through transistor amplifying stages 205, 215, 225 to 228 to a transmission line 15p. The emitters of transistors 209, 228, besides being connected to lines 15n, 15p respectively, are connected to earth through respective diodes 272, 274 in series with resistors. Pulses received on the transmission lines 15n, 15p pass through transistors 233, 235 in cascade thus pulsing an output D via transistors 239, 241 and an output E via transistor 247. The outputs D and E are "OR-ed " together. The transmitted pulses do riot pass through transistors 233, 235 in the receiver because the current path is shunted by the diodes 272, 274. Full and dashed arrows indicate direction of electron flow during transmission and reception respectively. |
