Patent
1995-07-17
1997-11-25
Auve, Glenn A.
395556, G06F 132
Patent
active
056922019
ABSTRACT:
A semiconductor device, microcomputer, or electronic equipment capable of switching internal power voltages in order to suppress the power consumption thereof can prevent erroneous operation of the internal circuitry by switching the level of the internal power voltage in a stepwise manner. A constant-voltage circuit that causes the generation of power voltages is capable of generating voltages of at least three levels. During the switching of the power voltages, a control circuit implements stepwise switching of the power voltages by causing the sequential output of the voltages in increasing or decreasing order of absolute value. Immediately after a switch of power voltage, the level of the signal on the signal line is determined to be at the same level as that before the switching even if a potential change in a signal line is delayed by more than a change in the threshold voltage of a digital circuit, and thus erroneous recognition of data, or rather data inversion, is prevented. This improves the reliability of the device.
REFERENCES:
patent: 5126695 (1992-06-01), Abe
patent: 5325074 (1994-06-01), Suenaga
patent: 5426755 (1995-06-01), Yokouchi et al.
patent: 5576737 (1996-11-01), Isozaki
Auve Glenn A.
Seiko Epson Corporation
LandOfFree
Electric power consumption reduction device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric power consumption reduction device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric power consumption reduction device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2116537