Integrated circuit with separate supply voltage for memory that is different from logic circuit supply voltage
First Claim
1. An integrated circuit comprising:
- at least one logic circuit supplied by a first supply voltage during use, wherein a first voltage domain corresponds to the first supply voltage; and
at least one memory circuit coupled to the logic circuit and supplied by a second supply voltage during use, wherein a second voltage domain corresponds to the second supply voltage, and wherein the memory circuit comprises one or more circuits that interface with the logic circuit, and wherein the one or more circuits are configured to level shift at least one signal between the first voltage domain and the second voltage domain, and wherein a magnitude of the first supply voltage is less than a magnitude of the second supply voltage at least a portion of the time during use, and wherein the logic circuit is configured to read and write the memory circuit.
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1 Petition
Accused Products
Abstract
In one embodiment, an integrated circuit includes at least one logic circuit supplied by a first supply voltage and at least one memory circuit coupled to the logic circuit and supplied by a second supply voltage. The memory circuit is configured to be read and written responsive to the logic circuit even if the first supply voltage is less than the second supply voltage during use. In another embodiment, a method includes a logic circuit reading a memory cell, the logic circuit supplied by a first supply voltage; and the memory cell responding to the read using signals that are referenced to the first supply voltage, wherein the memory cell is supplied with a second supply voltage that is greater than the first supply voltage during use.
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Citations
23 Claims
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1. An integrated circuit comprising:
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at least one logic circuit supplied by a first supply voltage during use, wherein a first voltage domain corresponds to the first supply voltage; and at least one memory circuit coupled to the logic circuit and supplied by a second supply voltage during use, wherein a second voltage domain corresponds to the second supply voltage, and wherein the memory circuit comprises one or more circuits that interface with the logic circuit, and wherein the one or more circuits are configured to level shift at least one signal between the first voltage domain and the second voltage domain, and wherein a magnitude of the first supply voltage is less than a magnitude of the second supply voltage at least a portion of the time during use, and wherein the logic circuit is configured to read and write the memory circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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supplying a logic circuit with a first supply voltage; supplying a memory circuit with a second supply voltage having a magnitude that is greater than a magnitude of the first supply voltage; the logic circuit generating a read to the memory circuit; the memory circuit responding to the read using signals that are referenced to the first supply voltage; and the memory circuit level shifting at least one of a plurality of signals generated by the logic circuit to perform the read, the level shifting from a first voltage domain corresponding to the first supply voltage to a second voltage domain corresponding to the second supply voltage. - View Dependent Claims (16, 17, 18, 19)
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20. An integrated circuit comprising:
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at least one logic circuit supplied by a first supply voltage during use, wherein a first voltage domain corresponds to the first supply voltage; and at least one memory circuit coupled to the logic circuit and supplied by a second supply voltage during use, wherein a second voltage domain corresponds to the second supply voltage, and wherein the memory circuit comprises one or more circuits that interface with the logic circuit, and wherein the one or more circuits are configured to level shift at least one signal between the first voltage domain and the second voltage domain, and wherein a magnitude of the first supply voltage is less than a magnitude of the second supply voltage at least a portion of the time during use, and wherein the logic circuit is configured to read and write the memory circuit, and wherein the memory circuit is further supplied by the first supply voltage in addition to the second supply voltage during use, wherein at least one of the one or more circuits is powered by the first power supply voltage during use. - View Dependent Claims (21, 22)
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23. An integrated circuit comprising:
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at least one logic circuit supplied by a first supply voltage during use, wherein a first voltage domain corresponds to the first supply voltage; and at least one memory circuit coupled to the logic circuit and supplied by a second supply voltage during use, wherein a second voltage domain corresponds to the second supply voltage, and wherein the memory circuit comprises one or more circuits that interface with the logic circuit, and wherein the one or more circuits are configured to level shift at least one signal between the first voltage domain and the second voltage domain, and wherein a magnitude of the first supply voltage is less than a magnitude of the second supply voltage at least a portion of the time during use, and wherein the logic circuit is configured to read and write the memory circuit, wherein the memory circuit comprises a plurality of precharge circuits configured to precharge lines in the memory circuit, and wherein the plurality of precharge circuits are supplied by the first supply voltage.
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Specification