Offset trimming for differential amplifier
AssigneeSanDisk Technologies LLC
InventorsDeep Saxena, Saurabh Singh
Life of this patent
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Abstract
Apparatuses, systems, and methods are disclosed for offset trimming for differential amplifiers. An apparatus includes a differential amplifier. A differential amplifier includes a non-inverting input, an inverting input, and an output coupled to the inverting input via a voltage divider. A first variable current source is coupled to a non-inverting input, so that increasing a current from the first variable current source increases a voltage at the non-inverting input. A second variable current source is coupled to an inverting input, and to an output via a voltage divider, so that increasing a current from the second variable current source decreases a voltage at the output.
Claims20
An apparatus comprising:
- a differential amplifier comprising a non-inverting input, an inverting input, and an output coupled to the inverting input via a voltage divider;
- a first variable current source coupled to the non-inverting input, such that increasing a current from the first variable current source increases a voltage at the non-inverting input;
- and
- a second variable current source coupled to the inverting input, and to the output via the voltage divider, such that increasing a current from the second variable current source decreases a voltage at the output.
A system comprising:
- one or more memory die, the memory die comprising:
- an array of non-volatile memory cells coupled to a plurality of word lines;
- a plurality of differential amplifiers coupled to the word lines to produce word line voltages, the differential amplifiers comprising non-inverting inputs, inverting inputs, and outputs coupled to the inverting inputs via voltage dividers;
- a plurality of first variable current sources coupled to the non-inverting inputs of the differential amplifiers, such that increasing a current from one of the first variable current sources increases a voltage at a corresponding non-inverting input;
- and
- a plurality of second variable current sources coupled to the inverting inputs of the differential amplifiers, and to the outputs via the voltage dividers, such that increasing a current from one of the second variable current sources decreases a voltage at a corresponding output.
An apparatus comprising:
- means for amplification of an input voltage to drive a word line voltage for a non-volatile memory array;
- means for providing a first current, the means for providing the first current coupled to a non-inverting input of the means for amplification, and coupled to ground via a load resistance, such that increasing the first current increases the word line voltage;
- and
- means for providing a second current, the means for providing the second current coupled to an inverting input of the means for amplification, coupled to an output of the means for amplification via a top resistor of a voltage divider, and coupled to ground via a bottom resistor of the voltage divider, such that increasing the second current decreases the word line voltage.
Dependencies are inferred from the claim text.