Prosecution Insights
Last updated: May 29, 2026
Application No. 18/185,042

VARIATION-AWARE ANALOG CIRCUIT SIZING WITH CLASSIFIER CHAINS

Non-Final OA §102
Filed
Mar 16, 2023
Priority
Mar 17, 2022 — provisional 63/320,774
Examiner
TAT, BINH C
Art Unit
2851
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Drexel University
OA Round
1 (Non-Final)
87%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 87% — above average
87%
Career Allowance Rate
1055 granted / 1208 resolved
+19.3% vs TC avg
Moderate +14% lift
Without
With
+14.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
22 currently pending
Career history
1234
Total Applications
across all art units

Statute-Specific Performance

§101
5.8%
-34.2% vs TC avg
§103
1.9%
-38.1% vs TC avg
§102
87.7%
+47.7% vs TC avg
§112
0.1%
-39.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1208 resolved cases

Office Action

§102
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. DETAILED ACTION This office action is in response to response to application 18/185042 filed on 03/16/23. Summary of claims Claims 1-9 are pending. Claims 1-9 are rejected. Oath/Declaration The oath/declaration filed on March 16th, 2023 is acceptable. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claims 1-9 rejected under 35 U.S.C. 102(a)(1) as being anticipated by Ishander et al. (US Pub. 2016/0171136). As to claims 1 the prior art teaches a method for generating optimal sizing solutions for devices of an analog circuit (see fig 1) that satisfy the design specifications on circuit performance parameters and robustness parameters, wherein at each iteration of determining the optimal sizing solution, prediction models are trained and optimization is executed on the prediction models, and the iteration stops when a qualified solution is found or a preset maximum number of iterations is reached, wherein an ensemble of classifier chain models is trained to predict each target circuit performance parameter based on device sizes by training on circuit data (see fig 1 -8 paragraph 0020-0035 and 0129-0140). As to claims 2, the prior art teaches wherein a multi-objective genetic algorithm is executed on m ensembles of the classifier chain to simultaneously maximize a probability that each of m performance specifications are satisfied (see fig 8-12 and 0302-0326). As to claims 3 the prior art teaches wherein the performance specifications of an analog circuit are generated with a SPICE solver that randomly generates combinations of transistor sizes; then binary labels are assigned with a classification with an algorithm that adaptively sets labeling thresholds (see fig 8-13 and 0326-0344). As to claims 4 the prior art teaches wherein classification is performed while using the algorithm, wherein a threshold is specified on a percentile of data values of a performance parameter to resolve lass imbalance in a sampled dataset; wherein if the percentile value exceeds a specification value of the performance parameter, the threshold is set to a specification value (see fig 8-14 paragraph 0341-0366). As to claim 5 the prior art teaches wherein binary labels are assigned as reference to the threshold (see fig 8-16 paragraph 0380-0412). As to claims 6 the prior art teaches wherein 1 is assigned for qualified data points and 0 is assigned for unqualified data points (see fig 8-16 paragraph 0414-0437). As to claims 7 the prior art teaches wherein one ensemble model is comprised of a number of decision-tree classifiers and a final prediction of the ensemble is calculated as an average of the predictions of all the classifiers (see fig 1 -8 paragraph 0020-0035 and 0145-0165). As to claims 8 the prior art teaches wherein to account for effects of circuit variations on circuit performance, standard deviations are calculated on evaluations of a performance parameter at all process, voltage, and temperature corners considered in an application of a set of transistor sizes (see fig 1 -8 paragraph 0160-0180). As to claim 9 the prior art teaches a method for sizing analog circuit components using a simulation-based optimization framework using classifier chains that represent relationships among output parameters to improve framework accuracy, wherein when considering effects of design variations on circuit performance, simulations for each design point are acquired at each corner of interest and the standard deviations of the performance variations across all of the corners for each design point are then calculated, wherein design points with performance fluctuations that fall below a set threshold T thre of the standard deviation are assigned with positive labels, while all other points are assigned negative labels (see fig 1 -9 paragraph 0020-0037 and 0141-0154). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to BINH C TAT whose telephone number is 571 272-1908. The examiner can normally be reached on flex 7:00Am-8PM. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Jack Chiang can be reached on 571 272-7483. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /BINH C TAT/Primary Examiner, Art Unit 2851
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Prosecution Timeline

Mar 16, 2023
Application Filed
Jan 02, 2026
Non-Final Rejection mailed — §102
Apr 28, 2026
Response Filed

Precedent Cases

Applications granted by this same examiner with similar technology

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
87%
Grant Probability
99%
With Interview (+14.1%)
2y 6m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1208 resolved cases by this examiner. Grant probability derived from career allowance rate.

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