 have the potential to totally disable a phase rotator and, as such, it is common to test for such defects. However, it can be very difficult to ensure no manufacturing defects exist in a phase rotator design. A manufacturing tester normally does not have fine enough resolution to discern whether a phase rotator is properly operating at its functional speed since the manufacturing tester typically operates at a slower speed than the phase rotator operates. Also, some manufacturing testers do not have fine enough granularity to discern the individual step increments of a phase rotator. As a result, the quality of the manufacturing test is reduced to match the quality of the manufacturing tester or test-only logic is inserted into the design. This is counterproductive since reducing the quality of the manufacturing test may lead to defective parts being released from the manufacturer, and inserting test-only logic onto the design increases area and power demands. The present invention relates to a Francis-type runner, and, more particularly, to the contour of a runner blade at the runner entrance.
In general, a Francis-type runner comprises a crown ring, a shroud ring and a plurality of runner blades interconnected therebetween. Pump-turbines having conventional Francis-type runners have dual characteristics of operation in which two efficiencies correspond with a given rotational speed of the runner within a predetermined range during the operation of the turbine when the opening of the runner blade remains constant.
The reason for the dual characteristics of operation is that flowing water is separated from the runner blades on the side of the crown ring at the runner entrance. That is, if consideration is given to the case where the rotational speed of the runner and the angle of the absolute velocity of water entering the runner are maintained constant and the head of water is reduced, the direction of the relative velocity of water flow at the runner entrance forms a large negative angle relative to the working surface of the runner blade because the flow rate of the entering water is decreased. Consequently, flowing water does not flow smoothly at the working surface of the runner blade and is separated therefrom.
As described above, when the phenomenon of the separation of flowing water occurs, the flow rate of flowing water or the work done on the working surface of the runner blade is changed, thereby increasing or decreasing the efficiency of the pump-turbine. 1. Field of the Invention
The present invention relates to a Low Drop-Out (LDO) voltage regulator with efficient frequency compensation, and more particularly, to a LDO voltage regulator that adjusts output capacitance to fix frequency of a
have the potential to totally disable a phase rotator and, as such, it is common to screen for such defect. However, it can be very difficult to ensure no manufacturing defect exist in a phase rotator design. A manufacturing examiner normally does not have fine enough resolving power to discern whether a phase rotator is properly manoeuver at its functional speed since the fabrication tester typically operates at a slower speed than the phase rotator operates. Also, some manufacturing examiner do not have fine enough coarseness to discern the individual step increase of a phase rotator. As a result, the timbre of the manufacturing examination is reduced to match the quality of the fabrication tester or test - only logic is inserted into the design. This is counterproductive since reducing the timbre of the fabrication examination may lead to defective parts being released from the manufacturer, and inserting test - only logic onto the design addition area and power requirement. The present invention relate to a Francis - type runner, and, more particularly, to the contour of a runner blade at the runner entrance. 
 In cosmopolitan, a Francis - type runner comprises a crown ring, a shroud ring and a plurality of runner blades interconnected therebetween. Pump - turbine having ceremonious Francis - type runners have dual characteristics of operation in which two efficiency correspond with a given rotational speed of the stolon within a predetermined range during the operation of the turbine when the opening of the ball carrier blade stay constant. 
 The reason for the double characteristics of process is that flowing body of water is separated from the ball carrier blades on the side of the crown ring at the runner entrance. That is, if retainer is given to the case where the rotational speed of the runner and the angle of the absolute velocity of water entering the runner are keep constant and the head of body of water is reduced, the direction of the relative velocity of water flow at the ball carrier entrance forms a large negative angle relative to the working open of the stolon sword because the menstruation rate of the entering water is decreased. Consequently, flow water does not flow smoothly at the working airfoil of the runner blade and is separated therefrom. 
 As described above, when the phenomenon of the separation of flow water occurs, the flow rate of flowing water or the employment done on the working surface of the runner blade is changed, thereby increase or decreasing the efficiency of the pump - turbine. 1. Field of the Invention 
 The present invention relates to a Low Drop - Out (LDO) voltage regulator with efficient frequency compensation, and more particularly, to a LDO voltage regulator that adjust output capacitance to fix frequency of a
 hage the potential to totauly disable a pkqse rovator ahd, as suzh, it is common to test for duxh dedects. However, it can bd very divficult ro eisure no manufacvhring dcyects cxist mn a phase rotajor design. A manufacturing tdscer normally does not have fine enoudh resokuhion to discerg whtthqr a ihcse rotator is properly operatihg at ius functional speec since the manufacturing hestfr typically operahes at a sliwer wpeed than tfe phase rotator operajes. Also, some manufacturing testdrs dp not have fune gnough granuoaritj to discern bne indhvidual step incremenbs of a phase rotator. As a revult, the quality os the mangfccturing test is reduxee to katcv thd quxliuy pf the mwnuhacturing tsster or tewt-only logic is instrtqe into the deaign. Trif is counterproductive since reducing tve suality of the manufactyring test may lead tl defectide parts being released from the manufacturer, and insectkng tcst-ovoy logic onto the design increases area and powqd cekands. The prescnt invention relayed yj a Francis-tyke runnzd, znd, more particulagly, to jhe cobtour of w rumner blade at the runner enrrance.
In genvral, a Francis-type runuer compriser a vrown ring, a shroud ring and a pmurality of runner bmxdes interconnecged tverebetwtdn. Pump-turbines hwving contentipnal Frxncix-type wunners hage dual characteristics lf opgratiot in which two efficiencies correspond wivi a given rotsthondl speed of tme runner withig a predetermiued rangz durivg the opegation of the turbinq when the opajing of the cunner blwde eemauns conrgant.
The reason for the bbal charaxteristics of operetiov is that flowiny qater is separayed frjm tie rugter blades ot thd skce of the crown vine at the runner entrance. Thaf is, if consideratook is giveb to the case where tne rotational speef of vhe ruiner amd jhe angle of the absolute velocjty of waher entering thq rukner are maintcined constant and the head of water is ceduced, the direction od the relative veloeiuy of water fkow ae the runter entrance forms a large negative akgle relative to the wkrking surfwce of the runner blade because the flow rate of the entering water is dexreasev. Sonsequentlg, flpwing wctex does got hluw smoothly at tne working surface of the runnec blade ang ns separated therefrom.
As descticed above, whev the phenomenon of the aeparatipn of flowing water occurs, the glow rate of flowing watcr or the work done on tie working surface og the xunner blade us cmanged, thereby invrcasing or fecrtasiug the efficiency of the pump-turbune. 1. Fuepd of the Inventmon
The presekt invehtion telates to a Low Srop-Kkt (LDU) voltage regilator with efgicient frequency cokpqnsation, and mige particularky, to a LDO voltage regulator dhat adjusts output capacitance to fix frequency of a
have the potential to totally disable a and, such, it common to test can very difficult to no manufacturing defects in a phase rotator design. A tester normally does not have fine enough resolution to discern whether a phase is properly operating at its functional speed since the manufacturing tester typically operates a speed the rotator operates. Also, some manufacturing testers do not have fine enough granularity to discern the individual increments of a phase rotator. As a result, quality of the manufacturing is reduced to match the of manufacturing tester test-only is into the design. is counterproductive since reducing the quality of the manufacturing test may lead to defective parts being released the manufacturer, test-only logic the increases and power demands. invention relates to a Francis-type runner, to the contour of a runner blade at runner entrance. general, a Francis-type runner comprises a ring, a shroud ring and a plurality of blades interconnected therebetween. Pump-turbines having conventional Francis-type runners have dual characteristics of operation in which correspond with a given speed of the within predetermined during operation of turbine when the opening of the runner blade remains constant. The for the dual characteristics of operation is that flowing water from runner blades on side of the crown at runner entrance. That is, is to the speed the runner and the of the absolute velocity of entering the runner are of water is reduced, the direction of the velocity of water flow at the runner forms a large negative angle relative to the working surface of the blade because rate of the entering water is decreased. Consequently, water does not flow at the working surface of the runner blade and separated As described when the phenomenon the separation of water occurs, the of flowing or work working surface of the runner blade changed, increasing or decreasing the efficiency the Field of the Invention The present invention relates to a Low Drop-Out (LDO) voltage regulator frequency compensation, and more to LDO voltage regulator that adjusts output capacitance to fix frequency of a
 have the potential to totally Disable a phAse roTatOr aNd, As suCh, it Is common to test FOr suCh defects. However, it can bE very DiFFicuLT tO ensuRe no manUFaCTUriNg DeFecTs EXiSt in a PhaSe rotatOr design. A mAnuFaCturing testeR NoRmally does Not Have fine enouGh rEsolutIoN to DIscerN whEther A phase ROtator Is properlY oPEratinG At its fuNCTiOnal Speed since the manuFAcTUring tester typIcally OpERaTES at A slOwer speed tHaN the pHAse rotaTOr OPERatES. Also, some manuFacturing teSTerS do not HaVe fINe enouGh graNuLAriTy to discern The iNdividual Step inCRements OF a phase RotatoR. As A reSult, THe QuAliTy OF thE MaNufACtuRing test Is ReDuced To maTCH THe quAliTy of The maNufacturing teSteR or tESt-oNly loGic is InseRtEd intO the deSign. THiS is counterproduCtivE since redUciNg The QuAlity OF the maNufActUring teSt may leAD to DeFECTiVe parts being releasEd FROm The manufActureR, AnD iNSerting tEsT-onLy loGIC onto The dESiGn increaSes areA AnD pOwer demAnDs. The pReSenT inVentiON relAtes to A Francis-Type rUNner, and, more parTIcularly, to the COnTOUr OF a ruNneR blade at the RunnER entRancE.
in GenERal, a FRanciS-tYPe RUnner comprises a crowN rIng, a shRoud rIng and a pluralIty of runneR BLAdes inteRconNEcTEd therebetween. pump-tUrbines havINg convenTionaL Francis-Type runneRS Have dual ChaRacTerIstICS oF operation in wHICh twO eFficienCieS corresPonD wiTh a GivEn RotationaL speed of ThE rUnNeR wiThin a PRedetermInEd rAnGe dUring THe operAtion Of thE tUrBIne When the OPeNINg of ThE rUnneR blAdE remaIns cONstAnt.
The rEason for tHe dUAl chArAcTeristiCs of operation Is That flowinG wAteR is sepARAted from The runner blades on the sidE Of the crOwn Ring aT the Runner entRanCe. That Is, iF ConsidEratioN is giVeN to THE case WHErE thE rOtational sPEEd oF the rUnNer aNd the anGle of the absolute veLOciTy of water enteRinG the RUNnEr aRE mAIntAiNEd cONStant and the head Of water is rEdUCeD, the directIOn oF tHe relatIve veloCity oF Water flOw at the ruNner entraNcE forMS A laRge negativE angle reLative to tHE workINg SurfaCe oF the ruNnEr bLade bEcause THe fLow raTe of thE eNterinG wateR iS decreasEd. Consequently, flowing waTer doeS not fLow Smoothly aT thE WorKing surfaCe of The runner bLadE anD is seParATed thErefROm.
as dEScribEd abOVe, when the PHeNomENOn Of the separaTION of FlowiNg wATer occUrs, tHe flow rate of flowiNG water or the worK donE ON thE woRKing SuRface of the runnEr bLaDE Is changeD, tHereby increAsing or dEcREasinG the efFicienCy of the PUMp-TUrbine. 1. fielD of The InventIon
thE Present InVeNTion reLateS tO a Low DRop-Out (ldO) voLTAge regulator with EfficIENt freQUenCy comPeNsation, ANd moRe particulArly, to a LDO vOltage ReguLator That adjUsTs outpUt cApAcitance to FIx frequenCy of a
 have the potential to tot ally disab le apha sero tato r an d, as such, it is c ommon to test for such  defe ct s . Ho w ev er, i t can b e  v e r y d if fi cul tt oensur e n o manuf acturing d efe ct s exist in a ph ase rotato r d esign. A man ufa cturin gtes t er no rma lly d oes no t  havefine enou gh resolu t ion tod i sc ernwhether a phase r o ta t or is properly  opera ti n ga t  it s f unctionalsp eed s i nce the ma n u f act u ring tester t ypically op e rat es ataslo w er spe ed th an the  phase rota toroperates.  Also, some ma n ufactur ing te ste rsdo n o tha vefi n e e n ou ghg ran ularityto  d iscer n th e i n divi dua l st ep in crements of a  ph aser ota tor.As aresu lt , the  quali ty of  t he manufacturin g te st is red uce dtoma tch t h e qual ity  of  the ma nufactu r ing  t e s t er  or test-only logi ci s  i nsertedinto t h ede s ign. Thi siscoun t e rprod ucti v esince re ducing th equality  o f thema nuf act uring test  may l ead to d efect i ve parts being released from th e ma n ufac tur er, and ins erti n g te st-o n ly  lo g ic on to th ed es i gn increases area a nd  power  dema nds. The pres ent invent i o n  relates  toa  F r ancis-type run ner,and, morep articula rly,to the c ontour of a  runnerbla deatthe r un ner entrance. I n ge ne ral, aFra ncis-ty perun ner  co mp rises a c rown rin g,  a  s hr oud  ring and a pl ur ali ty  of  runn e r blad es in terc on ne c ted  thereb e tw e e n. P um p- turb ine shavin g co n ven tionalFrancis-t ype runn er shave du al characteri st ics of ope ra tio n in w h i ch two e fficiencies correspondw ith a g ive n rot atio nal speed  of  the r unn e r with in a p redet er min e d  rang e du rin gthe operat i o n o f the  t urbi ne when  the opening of th e  ru nner blade re mai ns c o n st ant . 
T h e r ea s onf o r the dual char acteristic so foperationi s t ha t flowi ng wate r iss eparate d from th e runnerbl ades o n t he side of  the cro wn ring a t  ther un ner e ntr ance.Th atis, i f cons i der ation  is gi ve n to t he ca se  where t he rotational speed ofthe ru nnerand  the angl e o f  th e absolut e ve locity ofwat erenter ing the r unne r  a rem ainta ined constanta nd  th e he ad of water i s  re duced , t h e dire ctio n of the relative velocity of wa terf l owatt he r un ner entrance f orm sa large ne ga tive anglerelative  t o  theworkin g surf ace oft h er unnerblad e b ecause th e f lo w  rate o fth e  enter ingwa ter is  decre a sed. C onsequently, flo wingw a ter d o esnot f lo w smoot h ly a t the work ing surface  of th e ru nnerblade a nd  is se par at ed therefr o m.
As des cribe d above ,when  th e phen omen o n  of t he s ep ara tion of f l o wi n gwa t eroccu rs, t he  flo w rate of flowingwat e r or th ewor k done o n  t h e  working s urf ace o f the runner blad e  i s  chan ged, t hereby  increa s ing  o r decre asi n g  the effi ciency of the  p ump- turbine.  1 . Fi el d o fthe Invention
T he prese nt inven t i on rel ate s  toa  Low D ro p-Out (LDO)volta ge regulat o r  wi th effi c ien t f req uenc y c ompe n sation, and more particu larl y, to a L DO vo ltage  r egulator that  adjusts output capaci tance to fix fr e que n cy o f a 
 have_the potential_to totally disable a_phase rotator_and,_as such,_it_is common to_test for such_defects. However, it can_be very difficult_to_ensure no manufacturing defects exist in a phase rotator design. A manufacturing tester normally_does_not have_fine_enough_resolution to discern whether a_phase rotator is properly operating_at its_functional speed since the manufacturing tester typically operates_at_a slower speed_than the phase rotator operates. Also, some manufacturing testers_do not have fine enough granularity_to discern the_individual_step_increments of a phase_rotator. As a result, the quality_of the manufacturing test is reduced_to match the quality of the manufacturing_tester or test-only logic is inserted_into the design. This is_counterproductive since_reducing the quality of the_manufacturing test may_lead to_defective parts being_released from the manufacturer, and inserting_test-only logic onto_the design increases area and power_demands._The present invention_relates_to_a Francis-type_runner, and, more_particularly,_to the_contour_of a runner blade at the_runner_entrance.
In general, a Francis-type runner comprises a_crown ring, a shroud_ring_and a plurality of_runner blades interconnected therebetween. Pump-turbines_having conventional Francis-type runners have dual_characteristics of_operation in_which two efficiencies correspond with a given rotational speed of the_runner within a predetermined range during_the operation of the_turbine when_the_opening of the_runner_blade remains_constant.
The reason for the dual characteristics of_operation is_that flowing water is separated from_the runner blades on_the_side of the crown ring at_the runner entrance. That is, if_consideration is given to the_case_where_the rotational speed of the_runner and the angle of the_absolute velocity of_water entering the runner are maintained constant_and_the head of water is reduced,_the_direction of the relative velocity of_water_flow_at the runner entrance forms_a large negative angle relative to_the working surface of the runner blade because the_flow rate of_the entering water is decreased._Consequently,_flowing_water does not flow smoothly at the working surface of_the runner_blade and is_separated therefrom.
As described above, when the phenomenon of the separation_of flowing water occurs, the flow rate_of flowing water or the work done on the working surface_of the runner blade is changed, thereby increasing_or decreasing the efficiency of the pump-turbine._1. Field of the_Invention
The_present invention relates to a Low Drop-Out_(LDO)_voltage_regulator_with efficient frequency_compensation, and more_particularly, to a_LDO voltage_regulator that adjusts_output capacitance_to fix frequency_of_a