{"id":"https://openalex.org/W2136825932","doi":"https://doi.org/10.1109/iscas.2008.4541865","title":"A piezoelectric actuator driver circuit for automatic focusing of mobile phone cameras","display_name":"A piezoelectric actuator driver circuit for automatic focusing of mobile phone cameras","publication_year":2008,"publication_date":"2008-05-01","ids":{"openalex":"https://openalex.org/W2136825932","doi":"https://doi.org/10.1109/iscas.2008.4541865","mag":"2136825932"},"language":"en","primary_location":{"id":"doi:10.1109/iscas.2008.4541865","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iscas.2008.4541865","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2008 IEEE International Symposium on Circuits and Systems (ISCAS)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5047369937","display_name":"Sangduk Yu","orcid":null},"institutions":[{"id":"https://openalex.org/I139264467","display_name":"Seoul National University","ror":"https://ror.org/04h9pn542","country_code":"KR","type":"education","lineage":["https://openalex.org/I139264467"]},{"id":"https://openalex.org/I124633538","display_name":"University of Seoul","ror":"https://ror.org/05en5nh73","country_code":"KR","type":"education","lineage":["https://openalex.org/I124633538"]}],"countries":["KR"],"is_corresponding":true,"raw_author_name":"Sangduk Yu","raw_affiliation_strings":["University of Seoul, Korea","University of Seoul, Seoul,"],"affiliations":[{"raw_affiliation_string":"University of Seoul, Korea","institution_ids":["https://openalex.org/I124633538"]},{"raw_affiliation_string":"University of Seoul, Seoul,","institution_ids":["https://openalex.org/I139264467"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5080665105","display_name":"Kichang Jang","orcid":"https://orcid.org/0000-0002-0941-9639"},"institutions":[{"id":"https://openalex.org/I124633538","display_name":"University of Seoul","ror":"https://ror.org/05en5nh73","country_code":"KR","type":"education","lineage":["https://openalex.org/I124633538"]},{"id":"https://openalex.org/I139264467","display_name":"Seoul National University","ror":"https://ror.org/04h9pn542","country_code":"KR","type":"education","lineage":["https://openalex.org/I139264467"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Kichang Jang","raw_affiliation_strings":["University of Seoul, Korea","University of Seoul, Seoul,"],"affiliations":[{"raw_affiliation_string":"University of Seoul, Korea","institution_ids":["https://openalex.org/I124633538"]},{"raw_affiliation_string":"University of Seoul, Seoul,","institution_ids":["https://openalex.org/I139264467"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110388767","display_name":"Sanghyun Cha","orcid":null},"institutions":[{"id":"https://openalex.org/I2250650973","display_name":"Samsung (South Korea)","ror":"https://ror.org/04w3jy968","country_code":"KR","type":"company","lineage":["https://openalex.org/I2250650973"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Sanghyun Cha","raw_affiliation_strings":["Samsung Electro-Mechanics, Kyounggi-do, Korea"],"affiliations":[{"raw_affiliation_string":"Samsung Electro-Mechanics, Kyounggi-do, Korea","institution_ids":["https://openalex.org/I2250650973"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5037336105","display_name":"Y.J. Lee","orcid":"https://orcid.org/0009-0005-3044-5478"},"institutions":[{"id":"https://openalex.org/I2250650973","display_name":"Samsung (South Korea)","ror":"https://ror.org/04w3jy968","country_code":"KR","type":"company","lineage":["https://openalex.org/I2250650973"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Yeonjung Lee","raw_affiliation_strings":["Samsung Electro-Mechanics, Kyounggi-do, Korea"],"affiliations":[{"raw_affiliation_string":"Samsung Electro-Mechanics, Kyounggi-do, Korea","institution_ids":["https://openalex.org/I2250650973"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5111502276","display_name":"Ohjo Kwon","orcid":null},"institutions":[{"id":"https://openalex.org/I2250650973","display_name":"Samsung (South Korea)","ror":"https://ror.org/04w3jy968","country_code":"KR","type":"company","lineage":["https://openalex.org/I2250650973"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Ohjo Kwon","raw_affiliation_strings":["Samsung Electro-Mechanics, Kyounggi-do, Korea"],"affiliations":[{"raw_affiliation_string":"Samsung Electro-Mechanics, Kyounggi-do, Korea","institution_ids":["https://openalex.org/I2250650973"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5052707197","display_name":"Kee-Won Kwon","orcid":"https://orcid.org/0000-0003-4513-8532"},"institutions":[{"id":"https://openalex.org/I2250650973","display_name":"Samsung (South Korea)","ror":"https://ror.org/04w3jy968","country_code":"KR","type":"company","lineage":["https://openalex.org/I2250650973"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Kyougsoo Kwon","raw_affiliation_strings":["Samsung Electro-Mechanics, Kyounggi-do, Korea"],"affiliations":[{"raw_affiliation_string":"Samsung Electro-Mechanics, Kyounggi-do, Korea","institution_ids":["https://openalex.org/I2250650973"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100899132","display_name":"Joongho Choi","orcid":null},"institutions":[{"id":"https://openalex.org/I124633538","display_name":"University of Seoul","ror":"https://ror.org/05en5nh73","country_code":"KR","type":"education","lineage":["https://openalex.org/I124633538"]},{"id":"https://openalex.org/I139264467","display_name":"Seoul National University","ror":"https://ror.org/04h9pn542","country_code":"KR","type":"education","lineage":["https://openalex.org/I139264467"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Joongho Choi","raw_affiliation_strings":["University of Seoul, Korea","[University of Seoul, Korea]"],"affiliations":[{"raw_affiliation_string":"University of Seoul, Korea","institution_ids":["https://openalex.org/I124633538"]},{"raw_affiliation_string":"[University of Seoul, Korea]","institution_ids":["https://openalex.org/I139264467"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5047369937"],"corresponding_institution_ids":["https://openalex.org/I124633538","https://openalex.org/I139264467"],"apc_list":null,"apc_paid":null,"fwci":0.8225,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.79900687,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":"2","issue":null,"first_page":"2106","last_page":"2109"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11525","display_name":"Piezoelectric Actuators and Control","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11525","display_name":"Piezoelectric Actuators and Control","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13114","display_name":"Image Processing Techniques and Applications","score":0.9994000196456909,"subfield":{"id":"https://openalex.org/subfields/2214","display_name":"Media Technology"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10923","display_name":"Force Microscopy Techniques and Applications","score":0.9965000152587891,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/actuator","display_name":"Actuator","score":0.5631827712059021},{"id":"https://openalex.org/keywords/cmos","display_name":"CMOS","score":0.5212008357048035},{"id":"https://openalex.org/keywords/chip","display_name":"Chip","score":0.5018205642700195},{"id":"https://openalex.org/keywords/electrical-engineering","display_name":"Electrical engineering","score":0.49127763509750366},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4707534909248352},{"id":"https://openalex.org/keywords/voltage","display_name":"Voltage","score":0.4593648314476013},{"id":"https://openalex.org/keywords/signal","display_name":"SIGNAL (programming language)","score":0.43918636441230774},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.43487703800201416},{"id":"https://openalex.org/keywords/resistor","display_name":"Resistor","score":0.43013638257980347},{"id":"https://openalex.org/keywords/driver-circuit","display_name":"Driver circuit","score":0.42569291591644287},{"id":"https://openalex.org/keywords/mobile-phone","display_name":"Mobile phone","score":0.42246949672698975},{"id":"https://openalex.org/keywords/signal-generator","display_name":"Signal generator","score":0.4203377068042755},{"id":"https://openalex.org/keywords/analog-front-end","display_name":"Analog front-end","score":0.4117177724838257},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.3284511864185333},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.14057263731956482}],"concepts":[{"id":"https://openalex.org/C172707124","wikidata":"https://www.wikidata.org/wiki/Q423488","display_name":"Actuator","level":2,"score":0.5631827712059021},{"id":"https://openalex.org/C46362747","wikidata":"https://www.wikidata.org/wiki/Q173431","display_name":"CMOS","level":2,"score":0.5212008357048035},{"id":"https://openalex.org/C165005293","wikidata":"https://www.wikidata.org/wiki/Q1074500","display_name":"Chip","level":2,"score":0.5018205642700195},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.49127763509750366},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4707534909248352},{"id":"https://openalex.org/C165801399","wikidata":"https://www.wikidata.org/wiki/Q25428","display_name":"Voltage","level":2,"score":0.4593648314476013},{"id":"https://openalex.org/C2779843651","wikidata":"https://www.wikidata.org/wiki/Q7390335","display_name":"SIGNAL (programming language)","level":2,"score":0.43918636441230774},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.43487703800201416},{"id":"https://openalex.org/C137488568","wikidata":"https://www.wikidata.org/wiki/Q5321","display_name":"Resistor","level":3,"score":0.43013638257980347},{"id":"https://openalex.org/C183848499","wikidata":"https://www.wikidata.org/wiki/Q4167572","display_name":"Driver circuit","level":3,"score":0.42569291591644287},{"id":"https://openalex.org/C2777421447","wikidata":"https://www.wikidata.org/wiki/Q17517","display_name":"Mobile phone","level":2,"score":0.42246949672698975},{"id":"https://openalex.org/C207912722","wikidata":"https://www.wikidata.org/wiki/Q1259123","display_name":"Signal generator","level":3,"score":0.4203377068042755},{"id":"https://openalex.org/C2778870119","wikidata":"https://www.wikidata.org/wiki/Q16002927","display_name":"Analog front-end","level":3,"score":0.4117177724838257},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.3284511864185333},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.14057263731956482},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/iscas.2008.4541865","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iscas.2008.4541865","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2008 IEEE International Symposium on Circuits and Systems (ISCAS)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.8399999737739563,"display_name":"Affordable and clean energy","id":"https://metadata.un.org/sdg/7"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":10,"referenced_works":["https://openalex.org/W1566916904","https://openalex.org/W1995911701","https://openalex.org/W2083259895","https://openalex.org/W2147286873","https://openalex.org/W2162658193","https://openalex.org/W2163501505","https://openalex.org/W2533816651","https://openalex.org/W2548131371","https://openalex.org/W6683761732","https://openalex.org/W6728021102"],"related_works":["https://openalex.org/W3200817179","https://openalex.org/W1960166976","https://openalex.org/W2380067098","https://openalex.org/W1992708211","https://openalex.org/W2543503210","https://openalex.org/W1548152478","https://openalex.org/W2137172615","https://openalex.org/W2112564789","https://openalex.org/W2106247205","https://openalex.org/W2531567634"],"abstract_inverted_index":{"The":[0,89],"analog":[1],"front":[2],"end":[3],"(AFE)":[4],"chip":[5,91],"is":[6,68,92],"presented":[7],"to":[8,25,84],"perform":[9],"precise":[10],"automatic":[11],"focus":[12],"operations":[13],"with":[14],"a":[15,32,38,71,95],"piezoelectric":[16,33],"actuator":[17],"for":[18,70],"mobile":[19],"phone":[20],"camera":[21],"applications.":[22],"In":[23],"order":[24],"achieve":[26],"the":[27,35,49,53,64,85,104],"desired":[28],"frequency":[29,36,50,58,76],"response":[30],"of":[31,37,55,108],"actuator,":[34],"multi-vibrator":[39],"oscillator":[40],"can":[41,77],"be":[42,78],"swept":[43,80],"in":[44,94],"various":[45],"manners":[46],"such":[47],"as":[48],"step":[51],"and":[52,81,101],"number":[54],"transitions":[56],"between":[57],"changes.":[59],"A":[60],"novel":[61],"method":[62],"using":[63],"resistor":[65],"ladder":[66],"circuit":[67],"incorporated":[69],"bridge-driving":[72],"signal":[73],"generator":[74],"whose":[75],"linearly":[79],"controlled":[82],"according":[83],"input":[86],"digital":[87],"code.":[88],"AFE":[90],"implemented":[93],"0.35-\u03bcm":[96],"1-poly":[97],"4-metal":[98],"CMOS":[99],"technology":[100],"runs":[102],"at":[103],"single":[105],"supply":[106],"voltage":[107],"2.8V.":[109]},"counts_by_year":[{"year":2018,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}