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US 9,000,837 B1Granted
Adjustable reference voltage generator for single-ended DRAM sensing devices
AssigneeInternational Business Machines Corporation
InventorJohn A. Fifield
Life of this patent
Estimating the term…
Abstract
Methods, systems, and structures for generating a target reference voltage are provided. A circuit includes a voltage adjuster, a switch, and a current source. The switch selectively connects the current source to circuit paths in the voltage adjuster. A first of the circuit paths incrementally decreases the target reference voltage with respect to the input voltage. A second of the circuit paths incrementally increases the target voltage with respect to the input voltage.
Claims20
A circuit for generating a target reference voltage, comprising:
- a voltage adjuster;
- a switch;
- and
- a current source,
- wherein:
- the switch selectively connects the current source to one of a plurality of circuit paths in the voltage adjuster;
- a first circuit path of the plurality of circuit paths incrementally decreases the target reference voltage with respect to an input voltage;
- and
- a second circuit path of the plurality of circuit paths incrementally increases the target reference voltage with respect to the input voltage.
6 more elements
A circuit for a DRAM comprising:
- one or more devices configured to increase and decrease an output reference voltage provided to a single-ended sense device of a memory cell array,
- wherein:
- the one or more devices include an operational amplifier coupled to a current source having a plurality of selectable current increments;
- and
- the operational amplifier increases or decreases the output reference voltage based on which of the plurality of current increments are selected.
2 more elements
A method comprising:
- determining a difference between a switch-point voltage and an input voltage of a single-ended sense device;
- determining a voltage increment for the input voltage based on the difference;
- and
- adjusting the input voltage based on the voltage increment.
1 more element
Dependencies are inferred from the claim text.