System for displaying at a remote station data generated at a central station and for powering the remote station from the central station

摘要

A system for displaying at a remote station data generated at a central station and for powering the remote station from the central station. A power signal is generated at the central station and time multiplexed with the data and then transmitted to the remote station. An energy storage device at the remote station is responsive to the transmitted power signal to provide energizing power for the circuits at the remote station during the time interval data is being transmitted to the remote station. Typically, the data is time of day information and the remote station effects remote display of the time. Energizing power for the circuits at the remote station is provided by the power signal itself during the time this signal is transmitted. Preferably the energy storage device is a capacitor which is charged by the power signal during the time the power is transmitted and is slightly discharged during the time the data is transmitted to energize the circuits at the remote station. The transmitted time of day data is pulse width modulated and decoder circuitry at the remote station is responsive to the transmitted data to effect decoding thereof.