Prosecution Insights
Last updated: October 02, 2026
Application No. 19/048,402

FLAT SPOT SUPPRESSION IN SIGMA DELTA CONVERTERS

Non-Final OA §102§112
Filed
Feb 07, 2025
Examiner
MAI, LAM T
Art Unit
2845
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Infineon Technologies AG
OA Round
1 (Non-Final)
96%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
97%
With Interview

Examiner Intelligence

Grants 96% — above average
96%
Career Allowance Rate
987 granted / 1027 resolved
+28.1% vs TC avg
Minimal +1% lift
Without
With
+0.9%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 6m
Avg Prosecution
15 currently pending
Career history
1038
Total Applications
across all art units

Statute-Specific Performance

§101
16.3%
-23.7% vs TC avg
§103
18.8%
-21.2% vs TC avg
§102
32.9%
-7.1% vs TC avg
§112
7.9%
-32.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1027 resolved cases

Office Action

§102 §112
DETAILED ACTION 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 . Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claim 1 is rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the enablement requirement. The claim 1 contains subject matter which was not described in the specification in such a way as to enable one skilled in the art to which it pertains, or with which it is most nearly connected, to make and/or use the invention. On line 4 of claim 1, claims a modulation capacitor in series with the sampling capacitor which is not supported in the specification (none of drawings in the specifications show that the modulator capacitor is in series with the sampling capacitor). Claims 2-11 are rejected under 112(a) as well as being depended on based rejected claim 1. 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 – 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. Claim 1 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by Kim et al. (US 2020/0358454). Regarding claim 1, Kim et al. discloses an delta sigma ADC architecture in figure 6 that teaches: a sampling stage (3002) comprising a sampling capacitor (3121, 3122); and a modulation stage (1001, 1002) comprising: a modulation capacitor (1102, 1102) in series with the sampling capacitor (3121, 3122), a reference capacitor (3111, 3112), and a unit gain buffer (3101) (when RST 3142, 3141) closed 3101 become unit gain buffer, which means input and output is the same) having a non-inverting input terminal (-), an inverting input terminal (+) and an output terminal (N31,N32), wherein the non-inverting input terminal (-) is connectable to the reference capacitor (3112) and the modulation capacitor (1102), and the output terminal (N31, N32) is connected to the inverting input terminal (see descriptions of figure 6). Allowable Subject Matter Claims 2-11 are objected to as being dependent upon a rejected base claim, but they would be considered for allowable if they are rewritten in independent form including all of the limitations of the base claim and any intervening claims. The closest prior art of record, considered individually or in combination, fails to fairly teach or suggest objected features, which is: wherein the sampling capacitor is in series with a first switching device; the modulation capacitor is in series with the first switching device and a second switching device disposed between the modulation capacitor and the first switching device; the non-inverting input terminal is connectable to the reference capacitor through a third switching device, the inverting input terminal is in series with a fourth switching device and a fifth switching device, the output terminal is connectable to a node between the third switching device and the reference capacitor through a sixth switching device, and the reference capacitor is connected to a node between the fourth switching device and the fifth switching device. Claims 12-20 are allowable. The following is an examiner’s statement of reasons for allowance: Claim 12 is allowed over the closest prior art of record. The closest prior art of record, considered individually or in combination, fails to fairly teach or suggest invented features, which is “a unit gain buffer having a non-inverting input terminal, an inverting input terminal and an output terminal, wherein the non-inverting input terminal is connectable to the reference capacitor through a third switching device, the inverting input terminal is in series with a fourth switching device and a fifth switching device, the output terminal is connected to the inverting input terminal and connectable to a node between the third switching device and the reference capacitor through a sixth switching device, and the reference capacitor is connected to a node between the fourth switching device and the fifth switching device”, structurally and functionally interconnected with other limitations in the manner as cited in the claim and dependent claims. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Cited References The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Cited references are related to instant application subject matters. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to LAM T MAI whose telephone number is (571)272-1807. The examiner can normally be reached Monday-Friday 6am-2pm eastern time. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Dameon Levi can be reached at 571 272-2105. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /LAM T MAI/Primary Examiner, Art Unit 2845
Read full office action

Prosecution Timeline

Feb 07, 2025
Application Filed
Aug 24, 2026
Non-Final Rejection mailed — §102, §112 (current)

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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
96%
Grant Probability
97%
With Interview (+0.9%)
1y 6m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1027 resolved cases by this examiner. Grant probability derived from career allowance rate.

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