Charge recycling differential logic (CRDL) circuit and devices using the same
First Claim
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1. A logic circuit operating under a clock signal of first and second levels, comprising:
- first and second nodes;
means for pulling-up said first node to a first potential when the clock signal transits from the first level to said second level;
means for pulling-down said second node to a second potential when the clock signal transits from the first level to the second level; and
means for equalizing said first and second nodes to a third potential between said first and second potentials when the clock signal transits from the second level to the first level.
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Abstract
A novel logic family, called Charge Recycling Differential Logic (CRDL) circuit, reduces power consumption by utilizing a charge recycling technique and has a speed comparable to those of conventional dynamic logic circuits. The CRDL circuit also has improved noise margin due to inherently static operation. An 8-bit Manchester carry chains and full adders were fabricated using a 0.8 μm single-poly double-metal n-well CMOS technology. The measurement results indicate about 16-48% improvements in power-delay product are obtained compared with Differential Cascode Voltage Switch (DCVS) circuit.
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Citations
33 Claims
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1. A logic circuit operating under a clock signal of first and second levels, comprising:
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first and second nodes; means for pulling-up said first node to a first potential when the clock signal transits from the first level to said second level; means for pulling-down said second node to a second potential when the clock signal transits from the first level to the second level; and means for equalizing said first and second nodes to a third potential between said first and second potentials when the clock signal transits from the second level to the first level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A logic circuit comprising:
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first and second nodes; a pair of cross-coupled first and second transistors coupled to said first and second output nodes; a third transistor coupled to said first and second transistors, said third transistor equalizing said first and second nodes to potentials which are about equal to one another; and a logic network coupled to said first and second nodes for implementing a predetermined logic function, wherein each of said first, second and third transistors includes a first electrode, a second electrode and a control electrode, said control electrodes of said first and second transistors coupled to said first and second electrodes, respectively, of said third transistor and said control electrodes of said first and second transistors coupled to said second and first nodes, respectively, and second electrodes of said first and second transistors coupled to said first and second nodes, respectively, and the first electrode of said first and second transistors coupled for receiving a first predetermined source potential. - View Dependent Claims (19, 20, 21, 22)
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23. A method for recycling charges stored in first and second parasitic capacitors of first and second nodes, repectively, comprising the steps of:
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pulling-up the first node to a first potential when a clock signal transits from a first level to a second level; pulling-down the second node to a second potential when the clock signal transits from the first level to the second level; and equalizing the first and second nodes to a third potential between said first and second potentials when the clock signal transits from the second level to the first level. - View Dependent Claims (24)
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25. A logic circuit comprising:
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first and second nodes; a pair of cross-coupled first and second transistors coupled to said first and second output nodes; a third transistor coupled to said first and second transistors, said third transistor equalizing said first and second nodes to potentials which are about equal to one another; a logic network coupled to said first and second nodes for implementing a predetermined logic function; and at least one of a sense amplifier to accelerate a potential pull-down transition of said first and second nodes, and means for generating an output signal. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A logic circuit comprising:
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first and second nodes; a pair of cross-coupled first and second transistors coupled to said first and second output nodes; a third transistor coupled to said first and second transistors, said third transistor equalizing said first and second nodes to potentials which are about equal to one another; and a logic network coupled to said first and second nodes for implementing a predetermined logic function, wherein said first and second transistors are pMOS transistors, and said third transistor is an nMOS transistor. - View Dependent Claims (33)
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Specification