Operating-power reduction control system

Abstract

Abstract PURPOSE:To reduce the power consumption of a circuit part by increasing the dividing ratio of clocks applied to a timing generating circuit while lowering the frequency of a timing signal applied to the circuit part by dringing a divider circuit under the control of a stand-by operation circuit. CONSTITUTION:Synchronizing with clocks from clock generating circuit 2, timing generating circuit 4 generates a timing signal and a circuit part is provided which operates at the timing according to the timing signal from circuit 4. Here, divider circuit 3 is provided between circuits 2 and 4 and stand-by operation circuit 5 exercises control over circuit 3 to increase the dividing ratio of clocks applied to circuit 4 in stand-by operation mode while lowering the frequency of the timing signal applied to the circuit part. Consequently, the power consumption of the circuit part can be reduced.

Inventors

• 👤 Kensaku Wada
• 👤 Koichi Fujita
• 👤 Masaharu Kimura

Bibliographic Details