Voltage conversion and integrated circuits with stacked voltage domains
First Claim
1. An integrated circuit (IC) system, comprising:
- a plurality of ICs configured in a stacked voltage domain arrangement with respect to an external power supply voltage such that a low side supply rail of at least one of the plurality of ICs is common with a high side supply rail of at least another of the plurality of the ICs;
a reversible voltage converter coupled to power rails of each of the plurality of ICs, the voltage converter configured for stabilizing individual voltage domains corresponding to each IC; and
one or more data voltage level shifters configured to facilitate data communication between ICs operating in different voltage domains, wherein an input signal of a given logic state corresponding to one voltage in a first voltage domain is shifted to an output signal of the same logic state at another voltage in a second voltage domain;
wherein the one or more data voltage level shifters further comprise;
an inverter operating in the first voltage domain that receives the input signal of a given logic state;
a cross-coupled latch device operating in the second voltage domain that produces the output signal of the same logic state; and
a capacitor that dynamically couples an inverted value of the input signal to a first node of the latch device, such that a second, complementary node of the latch device corresponds to shifted output data for use in the second voltage domain.
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Accused Products
Abstract
An integrated circuit (IC) system includes a plurality of ICs configured in a stacked voltage domain arrangement such that a low side supply rail of at least one of ICs is common with a high side supply rail of at least another of the ICs; a reversible voltage converter coupled to power rails of each of the plurality of ICs, the reversible voltage converter configured for stabilizing individual voltage domains corresponding to each IC; and one or more data voltage level shifters configured to facilitate data communication between ICs operating in different voltage domains, wherein an input signal of a given logic state corresponding to one voltage in a first voltage domain is shifted to an output signal of the same logic state at another voltage in a second voltage domain.
68 Citations
17 Claims
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1. An integrated circuit (IC) system, comprising:
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a plurality of ICs configured in a stacked voltage domain arrangement with respect to an external power supply voltage such that a low side supply rail of at least one of the plurality of ICs is common with a high side supply rail of at least another of the plurality of the ICs; a reversible voltage converter coupled to power rails of each of the plurality of ICs, the voltage converter configured for stabilizing individual voltage domains corresponding to each IC; and one or more data voltage level shifters configured to facilitate data communication between ICs operating in different voltage domains, wherein an input signal of a given logic state corresponding to one voltage in a first voltage domain is shifted to an output signal of the same logic state at another voltage in a second voltage domain; wherein the one or more data voltage level shifters further comprise; an inverter operating in the first voltage domain that receives the input signal of a given logic state; a cross-coupled latch device operating in the second voltage domain that produces the output signal of the same logic state; and a capacitor that dynamically couples an inverted value of the input signal to a first node of the latch device, such that a second, complementary node of the latch device corresponds to shifted output data for use in the second voltage domain. - View Dependent Claims (2, 3, 5, 6, 8)
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4. An integrated circuit (IC) system, comprising:
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a plurality of ICs configured in a stacked voltage domain arrangement with respect to an external power supply voltage such that a low side supply rail of at least one of the plurality of ICs is common with a high side supply rail of at least another of the plurality of the ICs; a reversible voltage converter coupled to power rails of each of the plurality of ICs, the voltage converter configured for stabilizing individual voltage domains corresponding to each IC; and one or more data voltage level shifters configured to facilitate data communication between ICs operating in different voltage domains, wherein an input signal of a given logic state corresponding to one voltage in a first voltage domain is shifted to an output signal of the same logic state at another voltage in a second voltage domain; wherein the reversible voltage converter is configured to selectively operate in at least;
a first power mode in which each of the plurality of ICs utilize substantially the same current, a second power mode in which each of the plurality of ICs operate at substantially the same voltage, and a third power mode in which the plurality of ICs dissipate substantially the same amount of power.
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7. An integrated circuit (IC) system, comprising:
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a plurality of ICs configured in a stacked voltage domain arrangement with respect to an external power supply voltage such that a low side supply rail of at least one of the plurality of ICs is common with a high side supply rail of at least another of the plurality of the ICs; a reversible voltage converter coupled to power rails of each of the plurality of ICs, the voltage converter configured for stabilizing individual voltage domains corresponding to each IC; and one or more data voltage level shifters configured to facilitate data communication between ICs operating in different voltage domains, wherein an input signal of a given logic state corresponding to one voltage in a first voltage domain is shifted to an output signal of the same logic state at another voltage in a second voltage domain; wherein the plurality of ICs are disposed on a common chip comprising one of silicon-on-insulator (SOI) technology and triple well bulk technology.
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9. A reversible, switched capacitor voltage conversion apparatus, comprising:
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a plurality of individual unit cells coupled to one another in stages, with each unit cell comprising multiple sets of inverter devices arranged in a stacked configuration, such that each set of inverter devices operates in separate voltage domains wherein outputs of inverter devices in adjacent voltage domains are capacitively coupled to one another; and wherein outputs of at least one of the plurality of individual unit cells serve as corresponding inputs for at least another one of the plurality of individual unit cells; and wherein outputs of a last of the plurality of individual unit cells comprise inputs to a first of the plurality of individual unit cells in a ring oscillator type structure. - View Dependent Claims (10, 11, 12, 13)
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14. A method of regulating current, power and voltage levels of an integrated circuit (IC) system, the method comprising:
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configuring a plurality of ICs in a stacked voltage domain arrangement with respect to an external power supply voltage such that a low side supply rail of at least one of the plurality of ICs is common with a high side supply rail of at least another of the plurality of the ICs; coupling a reversible voltage converter to power rails of each of the plurality of ICs, the voltage converter configured for stabilizing individual voltage domains corresponding to each IC; and setting a clock frequency of the reversible voltage converter so as to selectively operate in the IC system in at least, other than a first power mode in which each of the plurality of ICs utilize substantially the same current;
a second power mode in which each of the plurality of ICs operate at substantially the same voltage, and a third power mode in which the plurality of ICs dissipate substantially the same amount of power. - View Dependent Claims (15, 16, 17)
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Specification