{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-10530385","patent":{"patent_number":"US-10530385","title":"Sigma-delta modulator","assignee":null,"inventors":[],"filing_date":"2017-06-22T00:00:00.000Z","publication_date":"2020-01-07T00:00:00.000Z","cpc_codes":["H04B","H04B"],"num_claims":20,"abstract":"A Sigma-Delta (ΣΔ) modulator for converting an analog input signal having a frequency bandwidth around a variable center frequency f0 to a digital output signal at a sampling frequency fs. The ΣΔ modulator comprises a quantizer (420) for generating the digital output signal and a loop filter for shaping the quantization noise. The loop filter comprises at least one subfilter (430, 410) centered around a frequency f0 and constant noise shaping coefficients (451, 452, 453). The ΣΔ modulator further comprises a tunable delay element (455), a frequency adjuster (480) for adjusting the sampling frequency fs such that the normalized center frequency f0/fs is constant, and a delay adjuster (490) for adjusting the loop delay td implemented by the quantizer and the tunable delay element (455), such that the normalized loop delay td/Ts falls in a predetermined range [tmin, tmax], where Ts=1/fs."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Sigma-delta modulator","description":"A Sigma-Delta (ΣΔ) modulator for converting an analog input signal having a frequency bandwidth around a variable center frequency f0 to a digital output signal at a sampling frequency fs. The ΣΔ modu","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-10530385","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-10530385","citation_suggestion":"Patentable. \"Sigma-delta modulator\" (US-10530385). https://patentable.app/patents/US-10530385","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-10530385","json":"https://patentable.app/api/llm-context/US-10530385","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T07:01:13.232Z"}