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Offset-canceling (OC) write operation sensing circuits for sensing switching in a magneto-resistive random access memory (MRAM) bit cell in an MRAM for a write operation
Offset-canceling (OC) write operation sensing circuits for sensing switching in a magneto-resistive random access memory (MRAM) bit cell in an MRAM for a write operation
Aspects disclosed in the detailed description include offset-canceling (OC) write operation sensing circuits for sensing switching in a magneto-resistive random access memory (MRAM) bit cell in an MRAM for a write operation. The OC write operation sensing circuit is configured to sense when MTJ switching occurs in MRAM bit cell. In an example, the OC write operation sensing circuit includes a voltage sensing circuit and a sense amplifier. The voltage sensing circuit employs a capacitive-coupling effect so that the output voltage drops in response to MTJ switching for both logic ‘0’ and logic ‘1’ write operations. The sense amplifier has a single input and a single output node with an output voltage indicating when MTJ switching has occurred in the MRAM bit cell. A single input transistor and pull-up transistor are provided in the sense amplifier in one example to provide an offset-canceling effect.
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