Method and apparatus for voltage regulation
First Claim
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1. A voltage regulator, comprising:
- a first amplifier comprising;
a first input electrically connected to a first node;
a second input electrically connected to a third node;
a first output;
a second amplifier comprising;
a first input electrically connected to a fourth node;
a second input electrically connected to a second node;
a second output;
an offset generator comprising;
a first input electrically connected to the first output from the first amplifier;
a second input electrically connected to the second output from the second amplifier;
a third input electrically connected to a reference voltage;
an offset output associated with an offset reference voltage and connected to an offset output node;
a compensation amplifier comprising;
a first input electrically connected to the first node; and
a second input electrically connected to the offset output node;
wherein the compensation amplifier is operative to drive a voltage at the first node to match the offset reference voltage.
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Abstract
An apparatus and method for regulating a voltage to a load to compensate for one or more parasitic impedances. A first amplifier measures the voltage drop due to a first parasitic impedance, and a second amplifier measures the voltage drop due to a second parasitic impedance. An offset generator sums the first and second voltage drops with a reference voltage, and drives a DC-to-DC converter to produce an input voltage matching the summed voltages. Accordingly, the voltage at a load between the parasitic impedances matches the reference voltage. The load may be, for example, a computer microprocessor or central processing unit.
116 Citations
33 Claims
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1. A voltage regulator, comprising:
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a first amplifier comprising;
a first input electrically connected to a first node;
a second input electrically connected to a third node;
a first output;
a second amplifier comprising;
a first input electrically connected to a fourth node;
a second input electrically connected to a second node;
a second output;
an offset generator comprising;
a first input electrically connected to the first output from the first amplifier;
a second input electrically connected to the second output from the second amplifier;
a third input electrically connected to a reference voltage;
an offset output associated with an offset reference voltage and connected to an offset output node;
a compensation amplifier comprising;
a first input electrically connected to the first node; and
a second input electrically connected to the offset output node;
whereinthe compensation amplifier is operative to drive a voltage at the first node to match the offset reference voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for regulating a voltage, comprising the operations:
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measuring a first voltage between a first node and a second node;
measuring a second voltage between a third node and a fourth node;
determining a first voltage loss from a first parasitic impedance between the first node and third node;
determining a second voltage loss from a second parasitic impedance between the second node and fourth node; and
adjusting the first voltage to compensate for the first and second voltage losses. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification