Power supply control device

Abstract

Abstract PURPOSE:To suppress current consumption in accordance with the operation/non- operation of a computer by outputting each control signal to be a large current or a small current from a signal adjusting circuit and controlling a current obtained from a power supply and flowing into a transistor (TR). CONSTITUTION:A backup control signal which is turned to an 'H' level signal in the operation mode of a CPU 1 or turning to an 'L' level signal in the non-operation mode is outputted from the CPU 1 to a control signal adjusting circuit 4. In the non-operation mode of the CPU 1, the 'L' level signal is inputted to a TR Tr3 in the circuit 4, the input signal is turned to a cut-off state and a current from a power supply is attenuated by a resistor R41 having a large resistance value and outputted as a small current control signal. In the operating mode of the CPU 1, an 'H' level backup control signal is outputted, the TR Tr3 is turned on, a current flowing through the resistor R41 is combined with a current flowing through the resistor R42 to form a large current signal.

Inventors

• 👤 Toshiyuki Hayashi
• 👤 利之 林
• 👤 Minoru Motohashi
• 👤 本橋　実
• 👤 Naoki Mato
• 👤 間藤　直樹
• 👤 Ryoji Nishigaki
• 👤 西垣　良二

Bibliographic Details