{"doi":"10.1587/elex.22.20250288","title":"Wide-operating-point DC-DC converter for sub-microwatt photovoltaic power conversion in biomedical implants","abstract":"This article presents a DC-DC converter designed for photovoltaic power conversion in biomedical implants. The design employs a differential topology for switching signal generation, enhancing signal robustness while reducing auxiliary circuit overhead. An input-supplied bootstrap circuit enables cold-start capability and prevents signal decay at low input voltage conditions. The circuit maintains optimal power conversion efficiency across a wide range of input conditions through oscillator tuning and charge pump reconfiguration. Implementation and simulation in 180 nm CMOS process demonstrate end-to-end power conversion efficiency of 50-86% across an input power range of 1.6nW-150μW. The converter remains operational from 723pW-500μW with input voltages of 128-420mV, while maintaining cold-start capability throughout this operating range.","journal":"IEICE Electronics Express","year":2025,"id":567983,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":0,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9507,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":812212,"name":"Masato Saito","orcid":"0009-0003-7436-7446","position":1,"is_corresponding":false},{"id":1472132,"name":"Yasufumi Yokoshiki","orcid":"0000-0001-6944-7298","position":2,"is_corresponding":false},{"id":1472133,"name":"Takashi Tokuda","orcid":"0000-0002-9117-2988","position":3,"is_corresponding":false},{"id":1472131,"name":"Reyhan Ramadhan","orcid":"0009-0008-5584-1823","position":0,"is_corresponding":true}],"reference_count":32,"raw_metadata":null,"created_at":"2026-07-19T02:56:48.183032Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}