MIL-STD-1553 buffer/driver

摘要

A bus buffer conditions and amplifies bi-directional electrical signals on a line carrying MIL-STD 1553 bi-polar signals. The device includes a receiver with a threshold detector, a signal conditioner including a retiming circuit and an amplifying transmitter. The signal conditioner receives filtered bi-polar signal output from the receiver and transforms the signal into separate uni-polar digital outputs. The signal conditioner includes means for increasing the positive voltage state period of each uni-polar output voltage state until the beginning of the next output voltage state to eliminate an effective null bus period during a signal transmission. A timing circuit includes a clock and logic circuitry which retimes and combines the uni-polar signals to create a bi-polar digital output having retimed zero-crossing points which is then transmitted out to a second bus. Two bus buffers are connected between the first and second buses in reverse orientation to provide bidirectional capability. An arbitrator circuit sequences signals arriving at the device from both directions based on detection of a null bus period at either bus.