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US 6,008,673 AGranted
High speed, low power, current mode comparator
AssigneeIntel Corporation
InventorsKevin W. Glass, Waleed Khalil, Bart R. McDaniel
Life of this patent
Estimating the term…
Abstract
A current regenerative comparator. A pair of cross coupled inverters are coupled to an equalizing transistor, an input current mirror and a reference current mirror, such that current flowing in the input current mirror is compared to the current flowing in the reference current mirror.
Claims7
An apparatus comprising:
- a pair of cross-coupled inverters;
- an equalizing transistor coupled between a first source of a first n-transistor of a first inverter and a second source of a second n-transistor of a second inverter;
- the equalizing transistor, an input current mirror and a reference current mirror coupled to the pair of cross-coupled inverters wherein the current flow in the input current mirror is compared to the current flow in the reference current mirror in response to an enable signal.
A circuit comprising:
- a pair of cross-coupled inverters having complimentary outputs indicative of a comparison of two input currents;
- equalizing means for equalizing a voltage at a first output node of a first transistor of a first inverter and a second output node of a second transistor of a second inverter in response to an enable signal being deasserted;
- and
- a first current mirror and a second current mirror coupled to the first output node and the second output node, respectively, to reflect the input currents into the inverters.
1 more element
Dependencies are inferred from the claim text.