Kodi Flat Coil Inductor ndi chiyani? Upangiri Woyamba Kuti Mumvetsetse Udindo Wake
Kodi Flat Coil Inductor ndi chiyani?
Tanthauzo ndi Ntchito Yoyambira
Flat coil inductor ndi mtundu wa zinthu zamagetsi zomwe zimasungidwa kuti zisunge mphamvu mu mphamvu ya maginito pamene magetsi akudutsamo. Mosiyana ndi ma inductors a mabala a mawaya, ma coil inductors amapangidwa pogwiritsa ntchito ma kondakitala athyathyathya, owoneka ngati ozungulira, omwe nthawi zambiri amakhazikika kapena kusindikizidwa pagawo laling'ono. Mapangidwe apaderawa amawathandiza kuti azikhala ndi malo ochepa pamene akugwira ntchito bwino.

Ntchito yayikulu ya coil inductor yathyathyathya ndikukana kusintha kwapano, ndikupangitsa kuti ikhale gawo lofunikira pakusefa, kusungirako mphamvu, ndi kugwiritsa ntchito ma siginecha. Zimagwira ntchito popanga mphamvu ya maginito yofanana ndi yomwe ikuyenda pakali pano, yomwe imatsutsana ndi kusintha kwadzidzidzi pakali pano. Katunduyu, yemwe amadziwika kuti inductance, amayezedwa ndi henries (H).
Flat coil inductors amayamikiridwa makamaka chifukwa cha kukula kwawo kophatikizika, mawonekedwe otsika, komanso magwiridwe antchito apamwamba, kuwapangitsa kukhala abwino pamagetsi amakono pomwe malo ndi magwiridwe antchito ndizofunikira.
Momwe Zimasiyanirana ndi Traditional Inductors
Ma coil inductors amasiyana kwambiri ndi ma inductors azikhalidwe zamawaya pamapangidwe ndi magwiridwe antchito. Pansipa pali tebulo lofananiza lomwe likuwonetsa kusiyana kwakukulu:
| Mbali | Flat Coil Inductor | Traditional Wire-Wound Inductor |
| Kupanga | Makondakitala athyathyathya, owoneka ngati ozungulira | Waya wozungulira pakati |
| Kukula | Zochepa komanso zotsika | Bulker ndi wamtali |
| Kupanga | Zokhazikika kapena zosindikizidwa pagawo | Kuvulala pamanja kapena ndi makina |
| Kuchita bwino | Kuchita bwino kwambiri pama frequency apamwamba | Ndikwabwino pamapulogalamu ocheperako |
| Mapulogalamu | Zamagetsi zamakono, zida zazing'ono | Zida zamagetsi, zamagetsi zakale |
Flat coil inductors amapambana pamagwiritsidwe apamwamba kwambiri chifukwa cha kuchepa kwawo kwa parasitic capacitance ndi kukana. Mapangidwe awo athyathyathya amachepetsanso kusokoneza kwa electromagnetic (EMI), kuwapangitsa kukhala oyenera mayendedwe odzaza. Mosiyana ndi izi, ma inductors achikhalidwe nthawi zambiri amakhala ochulukirapo komanso oyenerera kugwiritsa ntchito ma frequency otsika kapena amphamvu kwambiri.
Pogwiritsa ntchito njira zapamwamba zopangira, ma coil inductors osalala amapereka yankho lamakono pazida zamakono zamakono komanso zogwira ntchito kwambiri.
Zomwe Zimagwiritsidwa Ntchito Pazida Zamasiku Onse
Flat coil inductors amagwiritsidwa ntchito kwambiri pazida zosiyanasiyana zamagetsi chifukwa chakukula kwawo komanso kuchita bwino. M'munsimu muli mndandanda wazomwe mungagwiritse ntchito:
- Ma Smartphones ndi Ma Tablet: Amagwiritsidwa ntchito m'mabwalo oyang'anira mphamvu ndi ma module a RF kuti atsimikizire kugwira ntchito mokhazikika.
- Zida Zovala: Ndioyenera kwa tracker zolimbitsa thupi ndi ma smartwatches chifukwa chakuchepa kwawo.
- Zamagetsi Zagalimoto: Amapezeka m'masensa, ma infotainment systems, ndi ma driver-assistance systems (ADAS).
- Zida za IoT: Zofunikira pama module olumikizirana komanso mapangidwe osagwiritsa ntchito mphamvu.
- Zida Zachipatala: Amagwiritsidwa ntchito pazida zodziwira matenda komanso zida zolumikizidwa kuti zigwire ntchito yodalirika.
Nayi tebulo lofotokozera mwachidule ntchito yawo m'mafakitale osiyanasiyana:
| Makampani | Ntchito Chitsanzo | Udindo wa Flat Coil Inductor |
| Consumer Electronics | Mafoni am'manja | Kuwongolera mphamvu, kusefa chizindikiro |
| Zagalimoto | Machitidwe a ADAS | Phokoso kupondereza, chizindikiro kukhulupirika |
| Chisamaliro chamoyo | Zida zamankhwala zonyamula | Kusungirako mphamvu, ntchito yokhazikika |
| IoT | Zida zanzeru zakunyumba | Kuwongolera mphamvu moyenera |
Mapulogalamuwa amawunikira kusinthasintha komanso kufunikira kwa ma coil inductors muukadaulo wamakono. Pomwe zida zikupitilira kukula kwinaku zikufuna kuchita bwino kwambiri, ma coil inductors a Naheng Electronics amapereka mayankho odalirika kwa mainjiniya ndi opanga padziko lonse lapansi.
Momwe Flat Coil Inductors Amagwirira Ntchito
Sayansi Pambuyo pa Inductance
Inductance ndi katundu wa kondakitala wamagetsi omwe amatsutsana ndi kusintha kwa kayendedwe kamakono. Ma coil inductors amatengera mfundo imeneyi pogwiritsa ntchito waya wophimbidwa kapena kusaka kuti apange mphamvu ya maginito ikadutsa. Mphamvu ya maginito imeneyi imasunga mphamvu, yomwe imatulutsidwa m'derali pamene magetsi akusintha.
Mtengo wa inductance (woyesedwa mu henries) umatengera zinthu zingapo, kuphatikiza kuchuluka kwa ma koyilo, mawonekedwe a koyilo, ndi zinthu zapakati. Ma coil inductors amapangidwa ndi pulani, kutanthauza kuti koyiloyo imavulazidwa mozungulira, mozungulira m'malo mokhala ndi mawonekedwe amtundu wa cylindrical. Kapangidwe kameneka kamachepetsa malo kwinaku akusunga ma inductance apamwamba, kuwapangitsa kukhala abwino pazida zamagetsi zamagetsi.
Nayi kufananitsa kwachangu kwa ma coil inductors ophatikizika ndi ma cylindrical inductors achikhalidwe:
| Mbali | Flat Coil Inductor | Cylindrical Inductor |
| Maonekedwe | Lathyathyathya, planar | Cylindrical |
| Kuchita Mwachangu | Wapamwamba | Wapakati |
| Mtundu wa inductance | Zotsika mpaka zolimbitsa | Zosiyanasiyana |
| Mapulogalamu | Zida zamagetsi, ma PCB | Zozungulira zazikulu |
Kumvetsetsa sayansi ya inductance kumathandizira kufotokoza chifukwa chake ma coil inductors amakondedwa pamagetsi amakono, pomwe malo ndi magwiridwe antchito ndizofunikira.
Zigawo Zofunika Kwambiri Pamapangidwe a Flat Coil
Ma coil inductors amakhala ndi zinthu zingapo zofunika zomwe zimagwirira ntchito limodzi kuti zigwire bwino ntchito. Izi zikuphatikizapo:
- Ma Coil Windings: Kondakitala wathyathyathya, wooneka ngati wozungulira yemwe amapanga mphamvu ya maginito. Kuchuluka kwa matembenuzidwe ndi kusiyana pakati pawo kumakhudza mwachindunji inductance.
- Zofunika Kwambiri: Nthawi zambiri amapangidwa ndi ferrite kapena mpweya, pachimake kumawonjezera maginito a inductor. Ferrite cores imawonjezera inductance, pomwe ma cores a mpweya amachepetsa kutayika pama frequency apamwamba.
- Gawo lapansi: Zida zoyambira (nthawi zambiri PCB) pomwe coil imayikidwa. Amapereka chithandizo chamagulu ndikuonetsetsa kuti bata.
- Pokwerera: Malo olumikizira omwe amalola kuti inductor agwirizane ndi dera.
Pansipa pali tsatanetsatane wa momwe zigawozi zimathandizira kuti inductor igwire ntchito:
| Chigawo | Udindo | Impact pa Magwiridwe |
| Ma Coil Windings | Amapanga maginito | Imatsimikizira mtengo wa inductance |
| Zofunika Kwambiri | Imawonjezera maginito | Imakhudza magwiridwe antchito komanso kuyankha pafupipafupi |
| Gawo lapansi | Amapereka chithandizo chamankhwala | Zimatsimikizira kukhazikika ndi kukhazikika |
| Pokwerera | Zimagwirizana ndi dera | Imathandizira kuphatikiza |
Mwa kukhathamiritsa zida izi, Naheng Electronics imawonetsetsa kuti ma coil inductors awo akukwaniritsa zofunikira zamagetsi amakono.
Zomwe Zimakhudza Magwiridwe Antchito
Zinthu zingapo zimakhudza magwiridwe antchito a ma coil inductors, zomwe zimapangitsa kuti pakhale kofunika kusankha kapangidwe koyenera kagwiritsidwe ntchito kapadera. Zinthu izi zikuphatikizapo:
- Nthawi zambiri: Ma coil inductors amayenda mosiyanasiyana pama frequency osiyanasiyana. Kugwiritsa ntchito pafupipafupi kumafunikira zida zotayika pang'ono ngati ma air cores, pomwe zocheperako zimapindula ndi ma ferrite cores.
- Kutentha Kukhazikika: Inductance imatha kusiyana ndi kusintha kwa kutentha. Zipangizo zokhala ndi kukhazikika kwamafuta ambiri zimatsimikizira kugwira ntchito mosasinthasintha pamikhalidwe yogwirira ntchito.
- Zolepheretsa Kukula: Maonekedwe ophatikizika a ma coil inductors amawapangitsa kukhala abwino pazida zing'onozing'ono, koma opanga amayenera kulinganiza kukula ndi zomwe amafunikira.
- Kugwiritsa Ntchito Mphamvu: The inductor ayenera kusamalira chofunika panopa popanda kutenthedwa kapena kutaya mphamvu.
Nachi chidule cha momwe zinthu izi zimakhudzira magwiridwe antchito:
| Factor | Impact pa Magwiridwe | Kuganizira Mapangidwe |
| Nthawi zambiri | Imasankha chinthu chofunikira kwambiri | Gwiritsani ntchito ma air cores pama frequency apamwamba |
| Kutentha | Zimakhudza kukhazikika kwa inductance | Sankhani zida zokhazikika zotenthetsera |
| Kukula | Imakhudza inductance ndi kugwiritsa ntchito malo | Konzani kutembenuka kwa koyilo ndi katalikirana |
| Kugwiritsa Ntchito Mphamvu | Zimatsimikizira kudalirika pansi pa katundu | Sankhani mawaya oyenera |
Poganizira mosamala zinthuzi, mainjiniya amatha kukulitsa luso komanso kudalirika kwa ma coil inductors pakupanga kwawo. Naheng Electronics imapereka mayankho oyenerera kuthana ndi zovutazi, kuwonetsetsa kuti magwiridwe antchito azigwira bwino ntchito zosiyanasiyana.
Ubwino wa Flat Coil Inductors
Compact ndi Space-Saving Design
Flat coil inductors amapangidwa ndi mawonekedwe otsika, opangidwa ndi pulani, kuwapangitsa kukhala abwino kwa mapulogalamu omwe malo amakhala okwera mtengo. Mosiyana ndi ma inductors ovala mabala a waya, omwe amatha kukhala ochulukirapo, ma coil inductors amapangidwa kuti agwirizane bwino ndi zida zamagetsi zamagetsi monga mafoni a m'manja, zovala, ndi zida za IoT.

Gome ili m'munsili likuwonetsa kusiyana kwakukulu pakati pa ma coil inductors ndi ma inductors achikhalidwe amawaya:
| Mbali | Flat Coil Inductor | Traditional Wire-Wound Inductor |
| Mbiri Yapamwamba | Zochepa kwambiri | Zambiri |
| Kuchita Mwachangu | Wapamwamba | Zochepa |
| Kulemera | Wopepuka | Cholemera |
| Mapulogalamu | Zida zolimba | Kachitidwe kokulirapo |
Mapangidwe opulumutsa malowa samangowonjezera kusuntha kwa zida komanso amalola mainjiniya kukhathamiritsa masanjidwe a board ozungulira, zomwe zimapangitsa kuti pakhale mapangidwe abwino komanso osavuta.
Kuchita Bwino Kwambiri ndi Kasamalidwe ka Matenthedwe
Flat coil inductors amadziwika chifukwa chakuchita bwino kwambiri komanso kutentha kwambiri. Mapulani awo amachepetsa kutayika kwa mphamvu, kuwonetsetsa kuti mphamvu zambiri zimaperekedwa ku chipangizocho osati kutayika ngati kutentha. Izi zimawapangitsa kukhala oyenera kwambiri pakugwiritsa ntchito pafupipafupi, pomwe mphamvu zamagetsi ndizofunikira kwambiri.
Kuphatikiza apo, mawonekedwe a coil osalala amapereka kutentha kwabwinoko poyerekeza ndi ma inductors achikhalidwe. Tebulo ili m'munsiyi likufanizira kutenthedwa kwa ma coil inductors ndi njira zina zamabala a waya:
| Parameter | Flat Coil Inductor | Traditional Wire-Wound Inductor |
| Kutentha Kutentha | Zabwino kwambiri | Wapakati |
| Kutaya Mphamvu | Zochepa | Zapamwamba |
| Maulendo Ogwira Ntchito | Wapamwamba | Zochepa |
Pochepetsa kuchuluka kwa kutentha komanso kuwongolera mphamvu zamagetsi, ma coil inductors amathandizira kuti zida zizikhala ndi moyo wautali komanso kudalirika, ngakhale m'malo ovuta.
Kusinthasintha mu Zamagetsi Zamakono
Chimodzi mwazinthu zodziwika bwino za flat coil inductors ndi kusinthasintha kwawo. Amagwiritsidwa ntchito m'mafakitale osiyanasiyana, kuyambira pamagetsi ogula mpaka makina amagalimoto ndi mayankho amphamvu zongowonjezwdwa. Kuthekera kwawo kugwira ntchito bwino pama frequency apamwamba kumawapangitsa kukhala abwino pamagetsi, ma circuits a RF, ndi makina ochapira opanda zingwe.
Pansipa pali mndandanda wamagwiritsidwe omwe nthawi zambiri ma coil inductors amapambana:
- Consumer Electronics: Mafoni am'manja, mapiritsi, zovala
- Zagalimoto: Magalimoto amagetsi, machitidwe a infotainment
- Industrial: Zosintha zamagetsi, zoyendetsa zamagalimoto
- Mphamvu Zongowonjezwdwa: Ma inverter a dzuwa, ma turbine amphepo
Kusintha kwawo kumadera osiyanasiyana ndi zofunikira kumatsimikizira kufunika kwawo mumagetsi amakono. Kaya ikupangitsa kuti magalimoto azitha kuthamangitsidwa opanda zingwe kapena kuwongolera magwiridwe antchito agalimoto yamagetsi, ma coil inductors ndi omwe ali patsogolo pazaukadaulo.
Kusankha Choyimitsa Coil Choyenera
Zofunika Kuziganizira
Mukasankha chowongolera chowongolera, kumvetsetsa zofunikira zake ndikofunikira kuti muwonetsetse kuti mukugwiritsa ntchito bwino ntchito yanu. Pansipa pali zinthu zofunika kuziwunika:

| Kufotokozera | Kufotokozera | Chifukwa Chake Kuli Kofunika? |
| Mtengo wa Inductance | Kuyesedwa mu Henrys (H), kumatsimikizira kuthekera kwa inductor kusunga mphamvu. | Imawonetsetsa kuti ikugwirizana ndi zofunikira zadera ndikuletsa kusakwanira. |
| Mawerengedwe Apano | Pakali pano inductor angathe kugwira popanda kutenthedwa. | Zimalepheretsa kuwonongeka ndikuwonetsetsa kudalirika pansi pa katundu. |
| DC Resistance (DCR) | Kukaniza koyilo pamene DC yapano ikuyenda modutsamo. | Lower DCR imachepetsa kutaya mphamvu komanso imapangitsa kuti ntchito zitheke. |
| Maulendo Ogwira Ntchito | Kusiyanasiyana kwa ma frequency omwe inductor adapangidwa kuti azigwira ntchito mkati mwake. | Imawonetsetsa kugwira ntchito mokhazikika pamapulogalamu apamwamba kwambiri ngati mabwalo a RF. |
| Kukula ndi Fomu Factor | Miyeso yakuthupi ndi mawonekedwe a inductor. | Zofunikira pamapangidwe opanda malo, monga zamagetsi zam'manja. |
Poyang'ana mosamala izi, ogwiritsa ntchito amatha kusankha chowongolera chathyathyathya chomwe chimakwaniritsa zosowa zawo ndikupewa zovuta zomwe zingachitike monga kutentha kwambiri kapena kusagwira ntchito bwino.
Kufananiza Ma Inductors ku Mapulogalamu Enaake
Flat coil inductors ndi zinthu zosiyanasiyana zomwe zimagwiritsidwa ntchito pazinthu zosiyanasiyana. Kufananiza inductor yoyenera ndi yomwe mukufuna kugwiritsa ntchito ndikofunikira kuti mukwaniritse zomwe mukufuna. Pansipa pali kufananiza kwa mapulogalamu omwe wamba komanso zofunikira zofananira za inductor:
| Kugwiritsa ntchito | Zofunika Kwambiri | Zofunikira za Inductor |
| Zida Zamagetsi | Kuwongolera kwamakono, kutsika kwa DCR, komanso kukhazikika kokhazikika. | Flat coil inductors okhala ndi zomangamanga zolimba komanso kukhazikika kwamafuta. |
| Zozungulira za RF | Kugwiritsa ntchito pafupipafupi komanso kutayika kwazizindikiro kochepa. | Ma inductors okhala ndi mphamvu yotsika ya parasitic komanso high Q-factor. |
| Zamagetsi Zagalimoto | Kukhalitsa, kutentha kwakukulu, ndi kukana kugwedezeka. | Ma inductors olimba omwe ali ndi kudalirika kwakukulu komanso nthawi yayitali yogwirira ntchito. |
| Consumer Electronics | Kukula kochepa, kupepuka, komanso kugwiritsa ntchito mphamvu. | Miniaturized flat coil inductors okhala ndi mphamvu zochepa zotayika komanso mawonekedwe ophatikizika. |
Kusankha inductor yoyenera pa ntchito inayake kumatsimikizira kugwira ntchito bwino komanso moyo wautali, ndikupangitsa kukhala gawo lofunika kwambiri pakupanga mapangidwe.
Malangizo Othandizira Kusamalira ndi Moyo Wautali
Kusamalira bwino ndi kusamalira ma coil inductors athyathyathya kumatha kukulitsa moyo wawo ndikuwonetsetsa kuti akugwira ntchito mosasinthasintha. Nawa malangizo othandiza:
- Pewani Kuchulukitsitsa: Onetsetsani kuti inductor ikugwira ntchito mkati mwa malire ake omwe adavotera pano komanso ma voltage kuti ateteze kutenthedwa kapena kulephera.
- Monitor Kutentha: Sungani inductor mkati mwa kutentha kwake komwe kwatchulidwa kuti mupewe kuwonongeka kwa kutentha.
- Yenderani Nthawi Zonse: Yang'anani kuwonongeka kwakuthupi, monga ming'alu kapena zopindika, zomwe zingakhudze magwiridwe antchito.
- Gwiritsani Ntchito Kukwera Moyenera: Tetezani inductor mwamphamvu kuti mupewe kugwedezeka kapena kupsinjika kwamakina komwe kungayambitse kuwonongeka.
- Sambani Mosamala: Gwiritsani ntchito zotsuka zopanda ma conductive kuti muchotse fumbi kapena zinyalala popanda kusokoneza kukhulupirika kwa woyendetsa.
Potsatira malangizowa, ogwiritsa ntchito amatha kukulitsa nthawi ya moyo wa ma coil inductors awo ndikusunga magwiridwe antchito pakapita nthawi.
FAQ
1.Kodi coil inductor yosalala ndi chiyani ndipo imasiyana bwanji ndi ma inductors achikhalidwe?
Flat coil inductor ndi chinthu chamagetsi chomwe chimasunga mphamvu mu mphamvu ya maginito pamene mphamvu ikuyenda modutsamo. Mosiyana ndi ma inductors a mabala a mawaya, omwe amagwiritsa ntchito mawaya ophimbidwa mozungulira pakati, ma coil inductors amakhala athyathyathya, owoneka ngati ozungulira okhazikika kapena osindikizidwa pagawo. Mapangidwe awa amawapangitsa kukhala ophatikizika, ogwira mtima, komanso oyenera kugwiritsa ntchito ma frequency apamwamba, pomwe ma inductors achikhalidwe amakhala ochulukirapo komanso abwino kugwiritsa ntchito ma frequency otsika kapena okwera kwambiri.
2.Kodi zabwino zazikulu za ma coil inductors ndi ati?
Ma coil inductors a Flat coil amapereka zabwino zingapo, kuphatikiza kapangidwe kake kocheperako komanso kopulumutsa malo, kuchita bwino, komanso kasamalidwe kabwino ka kutentha. Mapangidwe awo otsika amawapangitsa kukhala abwino kwa zamagetsi zamakono monga mafoni a m'manja ndi zovala. Amachepetsanso kutaya mphamvu ndikupereka kutentha kwabwino kwambiri, kuwapangitsa kukhala ogwira mtima kwambiri komanso odalirika pamagwiritsidwe apamwamba kwambiri.
3.Kodi ma inductors a flat coil amagwiritsidwa ntchito bwanji?
Ma coil inductors amagwiritsidwa ntchito kwambiri pamagetsi ogula (mwachitsanzo, mafoni a m'manja, mapiritsi), zida zovala, makina amagalimoto (monga ADAS, infotainment), zida za IoT, ndi zida zamankhwala. Kukula kwawo kophatikizika komanso kuchita bwino kwambiri kumawapangitsa kukhala ofunikira pakuwongolera mphamvu, kusefa ma siginecha, ndi kusungirako mphamvu pazogwiritsa ntchito izi.
4.Kodi ndi zinthu ziti zomwe zimakhudza magwiridwe antchito a ma coil inductors?
Kachitidwe ka ma coil inductors amatengera zinthu monga kuchuluka kwa ma frequency, kukhazikika kwa kutentha, zopinga za kukula, ndi kagwiridwe ka mphamvu. Kugwiritsa ntchito pafupipafupi kumafunikira zida zotayika pang'ono ngati ma air cores, pomwe ma frequency otsika amapindula ndi ma ferrite cores. Kukhazikika kwa kutentha kumatsimikizira kuti inductance imasinthasintha, ndipo kukula koyenera ndi kugwiritsira ntchito mphamvu kumateteza kutenthedwa ndi kusagwira ntchito bwino.
5.Kodi ndingasankhire bwanji choyiziritsa chalathyathyathya choyenera kuti ndigwiritse ntchito?
Mukasankha cholumikizira chathyathyathya cha coil, lingalirani zofunikira zazikulu monga mtengo wa inductance, mlingo wapano, DC resistance (DCR), ma frequency ogwiritsira ntchito, ndi kukula kwake. Fananizani izi ndi zomwe mukufuna kugwiritsa ntchito, mwachitsanzo, kugwiritsa ntchito magetsi kwanthawi yayitali kapena kutsika kwa ma parasitic capacitance pamabwalo a RF. Kukonzekera koyenera, monga kupeŵa kulemetsa ndi kuyang'anira kutentha, kumatsimikiziranso moyo wautali ndi ntchito yabwino.
Source Links
● Zipinda Zogona | IEEE Journals & Magazini
● Ubale wa Inductance-geometry mu Flat Concentric Coils
● Compensation Topology kwa Flat Spiral Coil
● Plasma Ionization Mechanism ya Radio Frequency Ion Thruster yokhala ndi Flat Coil Inductor
● Ubwino wa Flat Wire Inductors for High Frequency, High Current Designs
● Flat Spiral Coil Antenna Design for Wireless Power Transfer Applications
● Kupanga ndi Kusanthula kwa Flat Spiral Inductors pa Ntchito za RF
● Kuchita Kwapamwamba Kwambiri kwa Flat Spiral Inductors pa Silicon Substrates
● Kukhathamiritsa kwa Flat Spiral Inductors for Low-Loss Wireless Power Transfer
● Kupanga ndi Makhalidwe a Flat Spiral Inductors for Integrated Circuits












