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US 11,056,164 B2Granted
Circuits to control output signal variability
AssigneeArm Limited
InventorsAkshay Kumar, El Mehdi Boujamaa, Cyrille Nicolas Dray
Life of this patent
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Abstract
Briefly, embodiments of claimed subject matter relate to circuits and methods for providing signals, such as signals to bring about writing of binary logic values to magnetic random-access memory (MRAM) cells. In particular embodiments, such circuits may operate to control output signal variability over an operating temperature range.
Claims20
A circuit, comprising:
- a first circuit to generate a first signal that exhibits a first characteristic that is proportional to ambient temperature (PTAT);
- a second circuit to generate a second signal that exhibits a second characteristic that is complementary to ambient temperature (CTAT);
- and
- a third circuit to receive the first and second signals at a same time and generate a combined signal by summation of the first signal and the second signal, wherein the combined signal exhibits a combined characteristic that is in alignment with a signal-versus-temperature limit of a resistive memory cell.
1 more element
A circuit, comprising:
- a summing circuit to obtain:
- a first input signal from a first circuit that generates an electric current that varies proportionally to ambient temperature, and
- a second input signal from a second circuit that generates an electric current that varies complementary to ambient temperature,
- wherein the summing circuit:
- generates a write signal to a memory cell based on a combination of the first and second input signals, and
- applies a weighting function to control a proportionate impact of the first signal with respect to the second signal on the generation of the write signal.
3 more elements
A method of fabricating a circuit, comprising:
- forming a first circuit to generate a first signal that exhibits a first characteristic that is proportional to ambient temperature (PTAT);
- forming a second circuit to generate a second signal that exhibits a second characteristic that is complementary to ambient temperature (CTAT);
- and
- forming a third circuit to receive the first and second signals at a same time and generate a combined signal by summation of the first signal and the second signal, wherein the combined signal exhibits a combined characteristic that is substantially invariant over an ambient temperature range.
1 more element
Dependencies are inferred from the claim text.