Semiconductor integrated circuit for generating an internal power source voltage with reduced potential changes
First Claim
1. A semiconductor integrated circuit device comprising:
- an integrated circuit section;
converting means for converting a first potential, which causes changes in potential levels, into a second potential which has a substantially constant potential range in which potential changes are reduced by regulating the first potential to a predetermined potential level; and
generating means driven by the second potential as a power source, for generating a third potential used as an operating power source for at least a part of circuits in the integrated circuit section.
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Accused Products
Abstract
A semiconductor integrated circuit device is provided that can restrict changes in the internal power source potential when an externally applied power source potential changes. The semiconductor integrated circuit device comprises an integrated circuit section, a voltage regulator for limiting an externally applied potential which causes changes in potential levels to a certain potential level to obtain a regulated potential, and a boost circuit driven by the regulated potential as a power source, for boosting the regulated potential to a boosted potential used as a operating power source for the integrated circuit section. The boost circuit is driven by the regulated potential limited to a certain potential level. Even when the level of the potential VCC changes, operation of the boost circuit does not substantially change. Due to the structure in which the boosted potential is generated from the regulated potential, the constant potential range of the boosted potential is enlarged so that operating margins of the device are enlarged.
55 Citations
28 Claims
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1. A semiconductor integrated circuit device comprising:
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an integrated circuit section; converting means for converting a first potential, which causes changes in potential levels, into a second potential which has a substantially constant potential range in which potential changes are reduced by regulating the first potential to a predetermined potential level; and generating means driven by the second potential as a power source, for generating a third potential used as an operating power source for at least a part of circuits in the integrated circuit section. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor integrated circuit device comprising:
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an integrated circuit section; first converting means for converting a first potential which causes changes in potential levels into a second potential which has a substantially constant potential range in which potential changes are reduced by regulating the first potential to a predetermined potential level; generating means driven by the second potential as a power source, for generating a third potential which is higher than the second potential and is used as an operating power source for at least a part of a first circuit block in the integrated circuit section; and second converting means using the third potential, for generating a fourth potential which is lower than the third potential and is used as an operating power source for at least a part of a second circuit block in the integrated circuit section. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A semiconductor integrated circuit device comprising:
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an integrated circuit section; first converting means for converting a first potential which causes changes in potential levels into a second potential which has a substantially constant potential range in which potential changes are reduced by regulating the first potential to a predetermined potential level; first generating means driven by the second potential as a power source, for generating a third potential which is higher than the second potential; second converting means for regulating the first potential by using the third potential as a control signal, and for generating a fourth potential which is used as an operating power source for at least a part of a first circuit block in the integrated circuit section; and second generating means using the second potential for generating a fifth potential used as an operating power source for at least a second circuit block in the integrated circuit section. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A semiconductor integrated circuit device comprising:
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an integrated circuit section; first generating means, having a constant potential range in which a potential variation is smaller than a potential variation of a first potential, for generating a second potential which is higher than the first potential; a first circuit block in which the second potential is used as an operating power source; second generating means, having a constant potential range in which a potential variation is smaller than the first potential, for generating a third potential which is higher than the first potential; third generating means for generating a fourth potential, lower than the first potential, by using the third potential; and a second circuit block in which the fourth potential is used as an operating power source, wherein the third generating means is a source follower type voltage regulator circuit including an insulated gate FET, the insulated gate FET having a drain to which the first potential is applied, a source from which the fourth potential is output, and a gate to which the third potential is applied. - View Dependent Claims (22)
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23. A semiconductor integrated circuit device comprising:
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an integrated circuit section; first converting means for converting a first potential which causes changes in potential levels into a second potential which has a substantially constant potential range in which potential changes are reduced by regulating the first potential to a predetermined potential level; generating means driven by the second potential as a power source, for generating third and fourth potentials which are higher than the second potential, the third potential being used as an operating power source for at least a part of a first circuit block in the integrated circuit section; and second converting means using the fourth potential, for generating a fifth potential which is lower than the fourth potential, the fifth potential being used as an operating power source for at least a part of a second circuit block in the integrated circuit section. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification