PATENT CLAIM ANALYSIS

Application Number: 15939923
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-10
Patent Classification: ["365", "158000"]

Abstract:
Magneto-resistive random access memory (MRAM) employing an integrated physically unclonable function (PUF) memory. The MRAM includes an MRAM array comprising an MRAM data array of data MRAM bit cells and an MRAM PUF array comprising PUF MRAM bit cells to form an integrated MRAM PUF array in the MRAM array. A resistance sensed from the PUF MRAM bit cells is compared to a reference resistance between the reference MRAM bit cells in the accessed MRAM bit cell row circuit in response to a read operation to cancel or mitigate the effect of process variations on MRAM bit cell resistance. The difference in sensed resistance and reference resistance is used to generate a random PUF output. By integrating the MRAM PUF array into an MRAM array containing an MRAM data array, access circuitry can be shared to control access to the MRAM data array and MRAM PUF, thus saving memory area.

Claim (Index 13):
The method of  claim 11 , wherein:\n generating a first reference write signal comprises:\n generating a first, second reference write signal to program a first reference MRAM bit cell in a first reference MRAM bit cell column circuit; and \n generating a second, second reference write signal to program a second reference MRAM bit cell in a second reference MRAM bit cell column circuit; and \n receiving the reference signal comprises:\n receiving a first reference signal representing a resistance of the first reference MRAM bit cell in the first reference MRAM bit cell column circuit; and \n receiving a second reference signal representing a resistance of the second reference MRAM bit cell in the second reference MRAM bit cell column circuit for the selected MRAM bit cell row circuit for the PUF read operation; \n further comprising averaging the first reference signal and the second reference signal to generate an average reference signal; and wherein:\n comparing the PUF data signal comprises comparing the PUF data signal to the average reference signal; and \n generating the PUF output comprises generating the PUF output based on a difference between the PUF data signal and the average reference signal.

Metadata:
- Claim Count in Document: 42.0
- Percentile: 90.0
- Lexical Diversity: 2.36765
- Patent Class: 365.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15639099', '15849863', '15676957', '15414855', '15078182']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7937204898076583
- 35 USC 102 Novelty (BERT): 0.5251981136591453
- Combined Prediction Score: 0.7668682521928071
- Mean Citation Score: 314.784094
- Max Citation Score: 347.02042
- Similarity Product: 240.9726180216527

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test