Circuits for determining the resistive states of resistive change elements
First Claim
1. A circuit for determining a resistive state of a resistive change element, said circuit comprising:
- a current source having an output terminal, wherein said current source is configured to supply a set amount of current to said output terminal, and wherein said set amount of current is the same amount for different resistive states of a resistive change element; and
a sense circuit, wherein said sense circuit comprises;
a field effect transistor dimensioned for determining a resistive state of a resistive change element, said field effect transistor having a gate terminal, a source terminal, and a drain terminal, wherein said drain terminal of said field effect transistor is electrically connected to said output terminal of said current source; and
a differential amplifier having a non-inverting input terminal, an inverting input terminal, and an output terminal, wherein said inverting input terminal is electrically connected to said source terminal of said field effect transistor, and wherein said output terminal is electrically connected to said gate terminal of said field effect transistor.
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Accused Products
Abstract
Devices and methods for determining resistive states of resistive change elements in resistive change element arrays are disclosed. According to some aspects of the present disclosure the devices and methods for determining resistive states of resistive change elements can determine resistive states of resistive change elements by sensing current flow. According to some aspects of the present disclosure the devices and methods for determining resistive states of resistive change elements can determine resistive states of resistive change elements without the need for in situ selection devices or other current controlling devices. According to some aspects of the present disclosure the devices and methods for determining resistive states of resistive change elements can reduce the impact of sneak current when determining resistive states of resistive change elements.
102 Citations
16 Claims
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1. A circuit for determining a resistive state of a resistive change element, said circuit comprising:
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a current source having an output terminal, wherein said current source is configured to supply a set amount of current to said output terminal, and wherein said set amount of current is the same amount for different resistive states of a resistive change element; and a sense circuit, wherein said sense circuit comprises; a field effect transistor dimensioned for determining a resistive state of a resistive change element, said field effect transistor having a gate terminal, a source terminal, and a drain terminal, wherein said drain terminal of said field effect transistor is electrically connected to said output terminal of said current source; and a differential amplifier having a non-inverting input terminal, an inverting input terminal, and an output terminal, wherein said inverting input terminal is electrically connected to said source terminal of said field effect transistor, and wherein said output terminal is electrically connected to said gate terminal of said field effect transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A circuit for determining a resistive state of a resistive change element, said circuit comprising:
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a current source having an output terminal, wherein said current source is configured to supply a set amount of current to said output terminal, and wherein said set amount of current is the same amount for different resistive states of a resistive change element; and a sense circuit, wherein said sense circuit comprises; a field effect transistor dimensioned for determining a resistive state of a resistive change element, said field effect transistor having a gate terminal, a source terminal, and a drain terminal, wherein said source terminal of said field effect transistor is electrically connected to said output terminal of said current source; and a differential amplifier having a non-inverting input terminal, an inverting input terminal, and an output terminal, wherein said non-inverting input terminal is electrically connected to said drain terminal of said field effect transistor, and wherein said output terminal is electrically connected to said gate terminal of said field effect transistor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification