 developments in wireless telephone systems allow not only voice communications but also data communications. For example, cellular phones can now receive and send short messages through a Short Message Service (SMS). Web pages can now be retrieved through wireless cellular links and displayed on cellular phones. Wireless Application Protocol (WAP) has been developed to overcome the constraints of relatively slow and intermittent nature of wireless links to access information similar or identical to World Wide Web.
Telephone companies provide a number of convenient features, such as call forwarding. Call forwarding of a telephone system allows a user of a phone at a given phone number to dial a specific sequence on the phone to cause the telephone system to forward incoming calls addressed to the phone number to another specified phone number indicated by the dialed sequence.
Telephone systems are frequently used in conducting business. Telephone numbers are typically provided in advertisements, web sites, directories, etc., as a type of contact information to reach businesses, experts, persons, etc.
The Internet is becoming an advertisement media to reach globally populated web users. Advertisements can be included in a web page that is frequently visited by web users. Typically, the advertisements included in the web pages contain only a limited amount of information a small paragraph, an icon, etc.). The advertisements contain links to the web sites that provide further detailed information. In certain arrangements, the advertisers pay the advertisements based on the number of visits directed to their web sites by the links of the advertisements.
Performance based advertising generally refers to a type of advertising in which an advertiser pays only for a measurable event that is a direct result of an advertisement being viewed by a consumer. For example, in one form of performance-based search advertising, an advertisement is included within a result page of a keyword search. Each selection (“click”) of the advertisement from the results page is the measurable event for which the advertiser pays. In other words, payment by the advertiser is on a per click basis in such advertising. DC-DC flyback converters using synchronous rectifiers are well known. When isolation between the input and output stage is required, the output voltage can be sensed by various methods for regulation feedback. Some ways to convey the output voltage while maintaining isolation include using an optocoupler or using an auxiliary winding on the primary side of the transformer. However, those ways require additional circuitry, space, power, and cost.
A more elegant way of detecting the output voltage is to sense a voltage at a terminal of the power switch when the power switch is off during
developments in wireless telephone systems allow not only part communication but also data communications. For exemplar, cellular phones can now meet and commit short message through a Short Message Service (SMS). Web pages can immediately be retrieved through wireless cellular links and display on cellular earphone. Wireless Application Protocol (WAP) has been developed to overcome the constraints of relatively slow and intermittent nature of wireless link to access information similar or identical to World Wide Web. 
 Telephone company provide a number of convenient features, such as cry forwarding. Call forwarding of a telephone system allows a user of a phone at a give phone number to dial a specific sequence on the phone to cause the telephone arrangement to forward incoming calls addressed to the phone number to another specified phone number indicated by the dialed sequence. 
 Telephone systems are frequently use in conducting business. Telephone number are typically provide in advertisements, web sites, directory, etc. , as a type of contact information to reach business, experts, persons, etc. 
 The Internet is becoming an advertisement media to reach globally populated network users. Advertisements can be included in a web page that is frequently visit by web user. Typically, the advertisements included in the web pages contain merely a limited amount of information a humble paragraph, an icon, etc .). The advertisements contain links to the network sites that provide farther detailed information. In sealed arrangements, the advertisers pay the advertisements free-base on the number of visits address to their web site by the links of the ad. 
 Performance based advertising generally mention to a type of advertising in which an advertiser pays entirely for a measurable event that is a direct solution of an advertisement being viewed by a consumer. For example, in one form of performance - based search advertising, an advertisement is included within a result page of a keyword search. Each choice (“ snap ”) of the ad from the resultant role page is the measurable event for which the advertiser pays. In other words, payment by the advertiser is on a per click footing in such advertising. DC - DC flyback converters using synchronous rectifiers are well known. When isolation between the input and output stage is required, the output voltage can be sense by various methods for regulation feedback. Some way to convey the output electric potential while maintaining isolation include using an optocoupler or using an auxiliary winding on the primary side of the transformer. However, those ways require additional circuitry, space, power, and cost. 
 A more elegant way of detecting the output voltage is to sense a electric potential at a end of the power substitution when the power switch is off during
 degelopments in wireless ttlephone systems colow nmt onlg voice zommunications but also data cimmunucations. For example, cdllular pjones cab nox receive and seis short messafcs thxongh a Short Mesxage Serviwe (SMS). Web pagas ccn now be retrieved through wireless cellulsr links and disklayec on dvloular phones. Wireless Applicafion Prmtocol (WAP) hax been developed to overcole tje constraints of gelatively wlow qnd intermitgent naturt mf wirelesa links to access information skmilax or identixao tl World Wide Web.
Tvlephone companies prmvide a number of conyenieit fwatures, such as call horwarding. Call forwwrding of a telephone system aolows a uver ud a phknx af a gigen phone numger to dial a specific sequenct og the phone to cause tre telephone system to forward incoming camls addressed to the phine number to another specifieq phone number indicated by the dialed sequence.
Tenephoie sywtcms xee frequently used in conducting business. Teleprknt nlmbers are typicajly providec ln wdvertisementr, web sitss, directories, etc., as a tipe of contact ynfotmation to reach businesses, experts, perfins, etc.
The Internec is becominy an acvertosement media to reach ylobalmy populatef web usedr. Advertisements cak ba includta in a web page trat is frxquencly visiged ny web users. Typlcalln, the advertisementd incpuged in the web pages contain only a limitxv amount of imfmrmdtion a fmall paragraph, an icon, etc.). The cdvertiszments contain lpnks to tie web sites that provide vurther detamled infowmatuon. Un certxkn arrangementx, the advvruisers pay the advertisementx bxaed on the numbzx if visits direcyed to tjemr wef sites by tha livks pf thd adverunsendnts.
Lerformance based adeertjsing generally regevs to a tipe of addertising in ehich an advertiseg payv oily fot a measurable event that is a didect resupt jf an advertysemcnt feing viewzd by a consumer. For example, in one form of performance-baswd search advertisiug, an advertixemene is inclgded within a result page of a keyworc search. Each selectikn (“cliwk”) of the advertisement from the results page is the measurable event for whicy the eddertiser pags. Im othvr corbs, paymqnt uy the advertiser ps on a per click basis in such edvertisinc. BC-DC flyback converters using shnchronous reztifiers are well known. Shen isokation between the input and ouyput stage is required, tme output voltzge can be sensed by various methobs for regularion feedback. Somd wsyd to convfy tie kutput voltage while maintaining isolariln include using an optocouiltr or uaing ag auxiliary windjng kj the primary side of the transfprmer. However, those fars require addunional circuijry, spacv, power, and cpst.
A more enegant way of detecting the output voltage is to sehse a voluage at a verminal of thg 'ower switch when the poeew switch is off duritg
developments in wireless telephone systems allow not communications also data For example, cellular send messages through a Message Service (SMS). pages can now be retrieved through cellular links and displayed on cellular phones. Wireless Application Protocol (WAP) has been to overcome the constraints of relatively slow and intermittent nature of wireless links access similar identical World Wide Web. Telephone companies provide a number of convenient features, such as call forwarding. Call of a telephone system allows a user of phone at a given number to dial a specific on phone to the system forward incoming calls to the phone number to another specified phone number indicated by the dialed sequence. Telephone systems are used in Telephone numbers typically in web sites, directories, a type of contact information to persons, etc. The Internet is becoming an advertisement to reach populated web users. Advertisements can be in a web page that is frequently visited web users. Typically, the advertisements included in the web pages contain only a limited amount a small paragraph, an etc.). The advertisements links the sites provide further information. In certain arrangements, the advertisers pay the advertisements based on number of visits directed to their web sites by the the Performance based advertising refers to a type advertising which an advertiser pays a event direct of advertisement being viewed by consumer. For example, in one of performance-based search advertising, a result page of a keyword search. Each (“click”) of the advertisement from the results is the measurable event for which the advertiser pays. In other words, by the on a per click basis in such advertising. flyback converters using synchronous are well known. When isolation between the input and stage required, the voltage can be by various methods regulation feedback. Some convey the voltage maintaining an optocoupler or using an auxiliary on primary side of the transformer. those additional circuitry, space, power, and cost. A more elegant way of detecting the output voltage sense a voltage at terminal the power switch when the power switch is off during
 developments in wireless telEphone systEms alLow Not OnLy voIce cOmmunications bUT alsO data communications. For ExampLe, CElluLAr PhoneS can now REcEIVe aNd SeNd sHoRT mEssagEs tHrough a short MessaGe SErVice (SMS). Web paGEs Can now be reTriEved through wIreLess ceLlUlaR Links And DisplAyed on CEllulaR phones. WiReLEss AppLIcation pROtOcol (wAP) has been developED tO Overcome the conStrainTs OF rELAtiVelY slow and inTeRmittENt naturE Of WIREleSS links to accesS informatioN SimIlar or IdEntICal to WOrld WIdE web.
telephone coMpanIes providE a numbER of convENient feAtures, SucH as Call FOrWaRdiNg. cAll FOrWarDIng Of a telepHoNe SysteM allOWS A User Of a PhonE at a gIven phone numbEr tO diaL A spEcifiC sequEnce On The phOne to cAuse tHe Telephone system To foRward incoMinG cAllS aDdresSEd to thE phOne Number tO anotheR SpeCiFIED pHone number indicateD bY THe Dialed seQuence.
tElEpHOne systeMs Are FreqUENtly uSed iN CoNducting BusineSS. TElEphone nUmBers arE tYpiCalLy proVIded In adveRtisemenTs, web SItes, directorieS, Etc., as a type of cONtACT iNFormAtiOn to reach buSineSSes, eXperTS, pErsONs, etc.
the InTeRNeT Is becoming an advertiSeMent meDia to Reach globally Populated wEB USers. AdveRtisEMeNTs can be includeD in a wEb page that IS frequenTly viSited by wEb users. TyPICally, the AdvErtIseMenTS InCluded in the weB PAges CoNtain onLy a Limited AmoUnt Of iNfoRmAtion a smaLl paragrApH, aN iCoN, etC.). The aDVertisemEnTs cOnTaiN linkS To the wEb sitEs thAt PrOVidE furtheR DeTAIled InFoRmatIon. in CertaIn arRAngEments, tHe advertiSerS Pay tHe AdVertiseMents based on tHe Number of viSiTs dIrecteD TO their weB sites by the links of the adVErtisemEntS.
PerfOrmaNce based aDveRtisinG geNErally Refers To a tyPe Of aDVErtisING iN whIcH an advertiSER paYs onlY fOr a mEasurabLe event that is a direCT reSult of an adverTisEmenT BEiNg vIEwED by A cONsuMER. For example, in onE form of perFoRMaNce-based seARch AdVertisiNg, an advErtisEMent is iNcluded wiThin a resuLt Page OF A keYword searcH. Each selEction (“cliCK”) of thE AdVertiSemEnt froM tHe rEsultS page iS The MeasuRable eVeNt for wHich tHe AdvertisEr pays. In other words, paymeNt by thE adveRtiSer is on a pEr cLIck Basis in suCh adVertising. Dc-DC FlyBack cOnvERters UsinG SyNchROnous RectIFiers are wELl KnoWN. whEn isolation BETWeeN the iNpuT And outPut sTage is required, the OUtput voltage caN be sENSed By vARiouS mEthods for regulAtiOn FEEdback. SoMe Ways to conveY the outpUt VOltagE while MaintaIning isOLAtIOn inclUde uSinG an optocoUplEr OR using aN aUxILiary wIndiNg On the pRimary SIde oF THe transformer. HowEver, tHOSe wayS ReqUire aDdItional CIrcuItry, space, pOwer, and cost.
a more eLegaNt way Of detecTiNg the oUtpUt Voltage is tO Sense a volTage aT a termiNaL of tHe pOwer swItch WHEn the PoweR sWitCh is off duRINg
 developments in wirelesstelephonesyste msall ow  not  onl y voice commun i cati ons but also data comm unica ti o ns.F or  exam ple, ce l lu l a r p ho ne s c an no w rec eiv e and s end shortmes sa ges througha  S hort Messa geService (SMS ).Web pa ge s c a n now  be  retr ievedt hrough  wireless  c e llular links a n d  d ispl ayed on cellularp ho n es. Wireless A pplica ti o nP r oto col  (WAP) has  b een d e veloped to o v erc o me the constr aints of re l ati vely s lo w a n d inte rmitt en t  na ture of wir eles s links t o acce s s infor m ation s imilar  or  id enti c al  t o W or l d W i de  We b .
T elephone  c om panie s pr o v i d e anum berof co nvenient feat ure s, s u chas ca ll fo rwar di ng. C all fo rward in g of a telephon e sy stem allo wsause rof ap hone a t a  gi ven pho ne numb e r t od i a la specific sequenc eo n  t he phone  to ca u se  t h e teleph on e s yste m to fo rwar d  i ncomingcallsa dd re ssed to  t he pho ne  nu mbe r toa noth er spe cified p honen umber indicate d  by the diale d  s e q ue n ce.Tel ephone syst emsa re f requ e nt lyu sed i n con du c ti n g business. Telepho ne  numbe rs ar e typically p rovided in a d vertisem ents ,  w e b sites, direc torie s, etc., a s  a typeof co ntact in formation t o reachbus ine sse s,e x pe rts, persons, e tc.Th e Inter net  is bec omi nganadv er tisementmedia to  r ea ch  g lob allyp opulated  w ebus ers . Adv e rtisem entscanbe  i n clu ded ina  w e b  pag eth at i s f re quent ly v i sit ed by w eb users.  Ty p ical ly ,the adv ertisements i nc luded in t he  we b page s containonly a limited amount o f  inform ati on asmal l paragra ph,  an ic on, etc.).  The a dvert is eme n t s con t a in  li nk s to the w e b  si tes t ha t pr ovide f urther detailed in f orm ation. In cer tai n ar r a ng eme n ts ,  th ea dve r t isers pay the a dvertiseme nt s  b ased on th e  nu mb er of v isits d irect e d to th eir web s ites by t he  lin k s  of  the adver tisement s.
Perfor m anceb as ed ad ver tising  g ene rally  refer s  to  a ty pe ofad vertis ing i nwhich an  advertiser pays only f or a m easur abl e event t hat isa directresu lt of an a dve rti semen t b e ing v iewe d  b y a consu mer. For examp l e,  in o ne  form of pe r f o rma nce-b ase d  searc h ad vertising, an adv e rtisement is i nclu d e d w ith i n are sult page of a  ke yw o r d search .Each select ion (“cl ic k ”) of  the a dverti sementf r om the re sult s p age is th e m ea s urableev en t  for w hich  t he adv ertise r  pay s .  In other words,  paym e n t byt headver ti ser iso n aper clickbasis in su ch adv erti sing.  DC-DCfl ybackcon ve rters usin g  synchron ous r ectifie rs  are  we ll kno wn.W h en is olat io n b etween th e in p ut  a n d o utpu t sta ge  isrequired, the outp utv oltageca n b e sensed by v arious met hod s for r egulationf eedb a ck .  Some  waysto con vey the out pu t volta gew h ile maint aining is o lat io n in clude us in g an  o pto co upler or usingan auxil iary win d i ng onthe prim a ry sid eof the trans forme r. However , tho se ways req uir e a ddit ion al c i rcuitry, space, power, a nd c ost.A  mo re el egant  w ay of de t ecti ng the o u tput voltageis to sense a v o lta g e at  at er mi nal of th e p o wer s witc h w henthe  pow e r  swi t ch i s  o ff d uring
 developments_in wireless_telephone systems allow not_only voice_communications_but also_data_communications. For example,_cellular phones can_now receive and send_short messages through_a_Short Message Service (SMS). Web pages can now be retrieved through wireless cellular links_and_displayed on_cellular_phones._Wireless Application Protocol (WAP) has_been developed to overcome the_constraints of_relatively slow and intermittent nature of wireless links_to_access information similar_or identical to World Wide Web.
Telephone companies provide a_number of convenient features, such as_call forwarding. Call_forwarding_of_a telephone system allows_a user of a phone at_a given phone number to dial_a specific sequence on the phone to_cause the telephone system to forward_incoming calls addressed to the_phone number_to another specified phone number_indicated by the_dialed sequence.
Telephone_systems are frequently_used in conducting business. Telephone numbers_are typically provided_in advertisements, web sites, directories, etc.,_as_a type of_contact_information_to reach_businesses, experts, persons,_etc.
The_Internet is_becoming_an advertisement media to reach globally_populated_web users. Advertisements can be included in_a web page that_is_frequently visited by web_users. Typically, the advertisements included_in the web pages contain only_a limited_amount of_information a small paragraph, an icon, etc.). The advertisements contain links_to the web sites that provide_further detailed information. In_certain arrangements,_the_advertisers pay the_advertisements_based on_the number of visits directed to their_web sites_by the links of the advertisements.
Performance_based advertising generally refers_to_a type of advertising in which_an advertiser pays only for a_measurable event that is a_direct_result_of an advertisement being viewed_by a consumer. For example, in_one form of_performance-based search advertising, an advertisement is included_within_a result page of a keyword_search._Each selection (“click”) of the advertisement_from_the_results page is the measurable_event for which the advertiser pays._In other words, payment by the advertiser is on_a per click_basis in such advertising. DC-DC_flyback_converters_using synchronous rectifiers are well known. When isolation between the_input and_output stage is_required, the output voltage can be sensed by various methods_for regulation feedback. Some ways to convey_the output voltage while maintaining isolation include using an optocoupler or_using an auxiliary winding on the primary side_of the transformer. However, those ways require_additional circuitry, space, power,_and_cost.
A more elegant way of detecting the_output_voltage_is_to sense a_voltage at a_terminal of the_power switch_when the power_switch is_off during