Watch system having asynchronous counters implemented by D and inverted D flip-flops

摘要

An electronic timekeeping system is implemented in bipolar integrated circuit technology for displaying time by way of a digital display. The bipolar circuitry is implemented utilizing integrated injection logic with asynchronous counters having outputs synchronized with the clock before coupling to the succeeding counter function, such as between the seconds and minutes counters. "D" flip-flops are utilized such that a D input is provided instead of a D input.