| 摘要 |
The digital electronic circuit ( 1 ) includes a logic cell ( 2 ) for processing data ( 82 ) , a flip-flop ( 3 ) for storing data ( 83 ) processed in the logic cell ( 2 ), a power supply ( 4 ), and a clock ( 5 ) for triggering the flip-flop ( 3 ) . The logic cell ( 2 ) is disconnected from the power supply ( 4 ) when the clock ( 5 ) is not active, as it is not needed for memorizing of the flip-flop states, and connected with the power supply ( 4 ) when the clock ( 5 ) is enabled. For switching the power supply, a switch ( 7 ) switched by the clock enable ( 6 ) is arranged between the logic cell ( 2 ) and the power supply ( 4 ). Such a simple additional switch ( 7 ) occupies only a relatively small area on the chip, but permits a drastic reduction by about 90% of the leakage currents. The circuit ( 1 ) is especially design and may be used for instance in mobile telecommunication devices.
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