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 35 U.S.C. 112(d):
(d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers.
The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph:
Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers.
Claim 10 is rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends.
Claim 10 fails to further limit the AC current sensor of claim 1 from which claim 10 depends. Claim 10 claims a wireless charging chip which in itself would not require the specifics of the AC current sensor of claim 1 for patentability.
Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements.
Allowable Subject Matter
Claims 1-9 are allowed.
The following is a statement of reasons for the indication of allowable subject matter: the prior art of record fails to teach or fairly suggest either alone or in combination thereof:
Regarding claim 1,
an AC current sensor, comprising:
an integrator circuit, configured to receive a first inductor voltage through a first input terminal of the integrator circuit, and perform integration on the first inductor voltage to generate a second inductor voltage, wherein the first inductor voltage is a voltage obtained by performing filtering processing on a voltage across an inductor in a TX coil, and the integrator circuit comprises a first adjustable resistor;
a differentiator circuit, configured to receive a first capacitor voltage through a first input terminal of the differentiator circuit, and perform differentiation on the first capacitor voltage to generate a second capacitor voltage, wherein the first capacitor voltage is a voltage obtained by performing filtering processing on a voltage across a capacitor in the TX coil, and the differentiator circuit comprises a second adjustable resistor; and
a calibration circuit, configured to generate a clock signal based on the first capacitor voltage, simultaneously adjust resistance values of the first adjustable resistor and the second adjustable resistor according to the clock signal, and compare a third inductor voltage with a third capacitor voltage in a real-time manner until the third inductor voltage is equal to the third capacitor voltage to complete calibration,
wherein the third inductor voltage is obtained by performing peak sampling on the second inductor voltage, and the third capacitor voltage is obtained by performing peak sampling on the second capacitor voltage, wherein after the calibration is completed, the second capacitor voltage output from the differentiator circuit is used to be converted into a current flowing through the TX coil according to a preset conversion relationship.
Conclusion
The prior art made of record and not relied upon is considered pertinent to applicant's disclosure.
Kim et al. (US 2025/0246944 teach an integrated circuit, wireless power transmission device, and operating method of wireless power transmission device.
Any inquiry concerning this communication or earlier communications from the examiner should be directed to JAMARA ALZAIDA FRANKLIN whose telephone number is (571)272-2389. The examiner can normally be reached Monday-Friday, 8:00am-4:30pm.
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, Thomas Pham can be reached at 571-272-3689. 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.
June 18, 2026
/JAMARA A FRANKLIN/Primary Examiner, Art Unit 2876
Prosecution Insights