DENSHISHIKIDEJITARUHYOJIUDEDOKEIYOKEISUSOCHI

摘要

A circuit for electronic watches to enable selection between a 12 hour clock display and a 24 hour clock display. The circuit is driven by the hours counter of a watch and includes a control input for selecting the mode of operation and a logic network having outputs for controlling the display of the tens of hours and, for a 12 hour clock system, for controlling an AM or PM display.