High Performance Output Drivers and Anti-Reflection Circuits
First Claim
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1. A high performance partial voltage interface circuit in a microprocessor comprises an integrated circuit output driver that drives one or a pair of partial voltage interface signal line(s), said output driver comprising:
- a first voltage supply source;
a second voltage supply source having a lower potential than said first voltage supply source;
one or more n-channel pull up transistors that couple the partial voltage interface signal line(s) to the first voltage supply source, and provide the majority of driving force to pull the electrical line toward the voltage of the first voltage supply source when the one or more n-channel pull up transistors are on; and
one or more p-channel pull down transistors that couple the partial voltage interface signal line(s) to the second voltage supply source, and provide the majority of driving force to drive the electrical line toward the voltage of the second voltage supply source when the one or more p-channel pull down transistors are on.
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Abstract
Long existing performance, noise, and power consumption problems of known output drivers are solved by using n-channel transistors as pull up transistors and/or p-channel transistors as pull down transistors for high performance output drivers. On-die termination-circuit-branches provide effective anti-reflection functions for multiple chips connected to the same transmission line(s).
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Citations
20 Claims
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1. A high performance partial voltage interface circuit in a microprocessor comprises an integrated circuit output driver that drives one or a pair of partial voltage interface signal line(s), said output driver comprising:
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a first voltage supply source; a second voltage supply source having a lower potential than said first voltage supply source; one or more n-channel pull up transistors that couple the partial voltage interface signal line(s) to the first voltage supply source, and provide the majority of driving force to pull the electrical line toward the voltage of the first voltage supply source when the one or more n-channel pull up transistors are on; and one or more p-channel pull down transistors that couple the partial voltage interface signal line(s) to the second voltage supply source, and provide the majority of driving force to drive the electrical line toward the voltage of the second voltage supply source when the one or more p-channel pull down transistors are on. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method to implement a high performance partial voltage interface circuit in a microprocessor comprising the steps of:
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providing an integrated circuit output driver comprising one or more n-channel pull up transistors and one or more p-channel pull down transistors; connecting the output of said integrated output driver to one or a pair of partial voltage interface signal line(s); providing a first voltage supply source having a first potential coupled to said integrated circuit output driver; providing a second voltage supply source having a second potential that is lower than the potential of the first voltage supply source; wherein said one or more n-channel pull up transistors provide the majority of driving force to drive said partial voltage interface signal line(s) towards the first potential when said one or more n-channel pull up transistors are on; and
said one or more p-channel pull down transistors provide the majority of the driving force to drive said partial voltage interface signal line(s) towards the second potential when said one or more p-channel pull down transistors are on. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification