Abstract: A paging receiver as part of an analog wristwatch. A received paging message is displayed using an analog watch mechanism which includes hands that are independently controllable. Around the perimeter of the watch face or on the watch bezel are marks representing paging messages, such as "Call Home,", "Call Office", etc. Paging messages are displayed by using one of the hands which normally is used to indicate time to point to one of the marks or messages on the perimeter of the watch. Optional features include using the watch hands not used to point to a mark representing a received paging message to point to a predetermined location to alert the user that a message has been received and using an LED can be used to indicate that a message has been received or that a message is pending. Other analog mechanisms, such as disks, drums, and sliding bars visible through respective apertures in the watch face can be used to display information concerning paging messages.

Abstract: Digital frequency demodulation is accomplished by monitoring similar transitions in an FM radio signal to determine frequency. Time intervals between similar transitions in the FM signal are established by selecting anticipated transition times and accumulating error values relative to actual transition times. Accumulated error values provide a basis for further selecting anticipated transition times in such manner that a reported sequence of anticipated transition times provides a basis for inferring signal frequency. In one illustrated embodiment, the chosen transition times are positive transitions in the FM signal and the anticipated times of transition are taken from a set of two time periods, an early transition and a late transition relative to a valid transition window.