Patent ID: 6018802
Filing Date: 2000-01-25
Classification: G06F,H04N

Abstract:
A communication apparatus comprising:a main power supply for supplying a power to respective units of the apparatus;a central control unit powered from said main power supply for controlling the entire apparatus;a rewritable data memory unit;a main power supply control unit for controlling an operation of said main power supply;a secondary battery charged by said main power supply for supplying a power to said main power supply control unit and said memory unit; andmeans for supplying the power from said secondary battery to said memory unit during the stop of said main power supply and supplying the power from said main power supply to said memory unit during the operation of said main power supply,wherein said main power supply control unit includes timer means and starts said main power supply when the power is not supplied from said main power supply for a predetermined time period and causes said main power supply to supply the power to said main power supply control unit and said secondary battery to start a stand-by charge mode.