公开(公告)号：US4121285A

公开(公告)日：1978-10-17

申请号：US783868

申请日：1977-04-01

Applicant: Frank K. Chen

Inventor： Frank K. Chen

IPC: G06F13/20 ,  G06F9/18

CPC classification number: G06F13/20

Abstract: An automatic alternator for a priority circuit comprises one or more flip-flop circuits connected to the channels of the priority circuit by a plurality of AND gate means which are responsive to outputs of the flip-flop circuits and of the priority circuit channels to alternate the servicing of successive simultaneous signals at two or more requesting ports. The flip-flop circuit input is connected to the requesting ports through an AND gate and changes its operating state in response to the presence of two simultaneous signals at the requesting ports and to a cyclically occurring clock input to the flip-flop circuit. When the operating state of the flip-flop circuit is changed to the alternating mode, the signal at the requesting port served by the priority circuit channel during the preceding cycle is blocked from that channel and another request signal appearing simultaneously at the remaining port or ports is applied to the other channel or channels. For a priority circuit having three or more channels, the automatic alternator circuit permits random or "free race" alternating servicing of simultaneous requests or alternatively may provide servicing of those requests in a predetermined sequence in the manner of a commutator.

Abstract translation: 用于优先电路的自动交流发电机包括一个或多个触发电路，其通过多个与门装置连接到优先电路的通道，触发器电路和优先电路通道的输出响应 在两个或更多个请求端口处对连续的同时信号进行服务。 触发器电路输入通过与门连接到请求端口，并且响应于在请求端口处存在两个同时的信号和向触发器电路的循环发生的时钟输入而改变其工作状态。 当触发器电路的操作状态改变为交替模式时，在前一周期期间由优先电路信道服务的请求端口处的信号被阻塞，并且在剩余端口或同一端口同时出现另一个请求信号 应用于其他频道或频道。 对于具有三个或更多个通道的优先电路，自动交流发电机允许对同时请求进行随机或“自由竞争”交替维修，或者可以以换向器的方式以预定顺序提供对这些请求的服务。