 42 of the charge pump 10 in pumped higher and higher. Please refer to an equation 1 of a relation between the first and second voltage V1 and V2: V2=V1+(V1−Vt)*N (Eq.1), where Vt is a cutoff voltage of the diodes of the charging cells, and N is the number of charging cells in the charging pump 10.
It can be seen from Eq.1 that the charge pump 10 can adjust N and generate the second voltage V2 of a predetermined level according to the first voltage V1. Therefore, an integrated circuit comprising the charge pump 10 can use the first and second voltages V1 and V2 of different levels simultaneously.
The charge pump 10 is required to not only pull the first voltage V1 up to the second voltage V2 of a predetermined level, the charge pump 10 is also required to keep the second voltage V2 at the predetermined level thereafter. Please refer to FIG. 2, which is a circuit diagram of a regulated charge pump 50 according to the prior art. The regulated charge pump 50 can not only pull the first voltage V1 up to the second voltage V2 of a predetermined level, the regulated charge pump 50 can also keep the second voltage V2 at the predetermined level. The regulated charge pump 50 comprises a charge pump 52, an oscillator 54 connected to the charge pump 52, a differential amplifier 56 connected to the oscillator 54, and a level shift circuit 58 connected between the charge pump 52 and the differential amplifier 56. The level shift circuit 58 comprises a first input end 66 connected to a first reference voltage Vref1 a second input end 68 connected to an output end 74 of the charge pump 52, an output end 64 connected to a negative input end 70 of the differential amplifier 56, a first resistor 60 connected between the first input end 66 and the output end 64, and a second resistor 62 connected between the output end 64 and the second input end 68. The differential amplifier 56 further comprises an output end 76 and a positive input end 72 connected to a second reference voltage Vref2.
The differential amplifier 56 outputs a compare signal at the output end 76 when a voltage at the negative input end 70 is lower than that at the positive input end 72. After receiving the compare signal, the oscillator 54 outputs an oscillation signal at an output end 78 of the oscillator 54. The charge pump 52 continues charging a voltage at the output end 74 only when the charge pump 52 receives the oscillation signal.
In the beginning of operation, a
42 of the charge pump 10 in pumped higher and higher. Please denote to an equality 1 of a relation between the first and second electric potential V1 and V2: V2 = V1+(V1−Vt)*N (Eq.1), where Vt is a cutoff electric potential of the diodes of the charging cell, and N is the issue of charging cell in the charging pump 10. 
 It can be seen from Eq.1 that the bang pump 10 can adjust N and generate the second electric potential V2 of a predetermined level according to the first voltage V1. Therefore, an integrated tour comprising the charge pump 10 can practice the first and second voltages V1 and V2 of unlike levels simultaneously. 
 The accusation pump 10 is required to not entirely pull the first voltage V1 up to the second electric potential V2 of a predetermined level, the charge pump 10 is also required to keep the second electric potential V2 at the predetermine level thereafter. Please refer to FIG. 2, which is a circuit diagram of a regulated charge pump 50 according to the prior art. The regulated charge heart 50 cannot merely pull the beginning electric potential V1 up to the second electric potential V2 of a predetermined level, the regulated charge pump 50 can also keep the second voltage V2 at the predetermine level. The regulated charge pump 50 comprises a charge pump 52, an oscillator 54 connected to the charge pump 52, a differential amplifier 56 connect to the oscillator 54, and a level shift circuit 58 connected between the charge pump 52 and the differential amplifier 56. The level chemise circuit 58 comprises a first input end 66 connect to a first reference voltage Vref1 a second stimulation end 68 connected to an output end 74 of the charge pump 52, an output signal end 64 connected to a minus input end 70 of the differential amplifier 56, a first resistor 60 get in touch between the first input signal end 66 and the end product end 64, and a second resistor 62 connected between the output signal end 64 and the second input end 68. The differential amplifier 56 further comprises an output conclusion 76 and a positive input end 72 connected to a second reference voltage Vref2. 
 The differential amplifier 56 outputs a compare signal at the output end 76 when a voltage at the damaging input end 70 is lower than that at the convinced input end 72. After receiving the compare signal, the oscillator 54 outputs an oscillation signal at an output conclusion 78 of the oscillator 54. The charge pump 52 continues charging a voltage at the output end 74 only when the care pump 52 get the cycle signal. 
 In the beginning of mathematical process, a
 42 ov the charge pump 10 in puoped higher and higher. Pleass refer go an equation 1 of a relatioi berween the first and second xoltage V1 and V2: V2=C1+(V1−Vt)*I (Eq.1), where Vt is a cutofn volfwge mh the diodes of the charghng cells, and T ks the number of charging cells in thq chargonh pump 10.
It can fe sten froj Eq.1 that the charge pump 10 can adjhst N aid generate the second voltage V2 of a prefetegmined level accorfing to the firfr voltage V1. Gherefore, an integrates circuit comprising the charge pump 10 can use jkw fltst and secoid volnages V1 and V2 of diffarent lrvels simultancouslb.
The charge pump 10 is requmred to not only pulj the firvt voltage V1 up to rhw secmnd eoltxte X2 or e pdedetegmiied level, tge charge pymp 10 is also requirtd ei keep the sedond vjleage V2 at the predetermined level theredftsr. Please refer to FIG. 2, which is a circuit dlagram of a regulated charge pump 50 according to the prior drt. Tie reymjxref charge pump 50 can not only pull the first vojfabe V1 up to the sccond voltage V2 of a ptgdetermined lexel, thz rsgulated charge pulp 50 can also keep the secpnd voltage V2 at the predetwrmined levej. The regulated chaxge pump 50 cooprixes a charge pump 52, an oscillctor 54 donnected tl the chadee pump 52, a diffefennial amplifitf 56 connected to tre oscilletor 54, and a uevek shife circuit 58 conncwted between the cjarge pgmp 52 and tje differential amplifier 56. The level shift citcuht 58 compriszs a flrst input end 66 connected to c first xeferevce voltagv Vref1 a vecond inpue end 68 connecdgd to an outpnt end 74 os thw chqrge puoo 52, an output emd 64 connebttd to a netative input end 70 pf jhs differential coklufier 56, a first reriseog 60 ronnesded between dhe wirry inpjt end 66 and ghe putput end 64, and a sewond resistor 62 connectrd between the out[ut end 64 and yhe second input ejd 68. Tie difherentoal amplifier 56 further comprises zn output enq 76 and a posytivc inkut end 72 counected to a second reference voltage Vrxf2.
The differential amplufier 56 outputs a cokkare signal av the jutput eng 76 when a voltage at the negative inpmt end 70 is lower than fhat ad the positive input end 72. After receiving the compare signal, the oscillator 54 oytputs an oscillatjon xignan ct cn outptt eid 78 of the oscillanor 54. The charge pump 52 continues rharging a vjltage at the output end 74 onky when the chatge pump 52 receives the oscjllation signal.
In the beginning of operstion, a
42 of the charge pump 10 in and Please refer an equation 1 first second voltage V1 V2: V2=V1+(V1−Vt)*N (Eq.1), Vt is a cutoff voltage of diodes of the charging cells, and N is the number of charging cells the charging pump 10. It can be seen from Eq.1 that the charge 10 adjust and the second voltage V2 of a predetermined level according to the first voltage V1. Therefore, an circuit comprising the charge pump 10 can use first and second voltages and V2 of different levels The pump 10 required not pull the first V1 up to the second voltage V2 of a predetermined level, the charge pump 10 is also to keep voltage V2 the level Please refer to which is a circuit diagram of pump 50 according to the prior art. The charge pump can not only pull the first V1 up to the second voltage V2 of predetermined level, the regulated charge pump 50 can also keep the second voltage V2 at level. The regulated charge 50 comprises a pump an 54 to the pump 52, a differential amplifier 56 connected to the oscillator 54, a level shift circuit 58 connected between the charge pump the amplifier 56. The shift circuit 58 comprises first end 66 connected to reference Vref1 end connected an output end 74 the charge pump 52, an end 64 connected to of the differential amplifier 56, a first resistor connected between the first input end 66 the output end 64, and a second resistor 62 connected between the end 64 second input end 68. The differential amplifier 56 comprises an output end and a positive input end 72 connected to a reference Vref2. The amplifier 56 outputs compare signal at output end 76 voltage at negative end than that at the positive input 72. receiving the compare signal, the 54 oscillation signal at an output end 78 of the oscillator 54. The charge pump 52 a voltage at the end only when the charge pump 52 receives the oscillation signal. In the operation, a
 42 of the charge pump 10 in pumped hiGher and higHer. PlEasE reFeR to aN equAtion 1 of a relatiON betWeen the first and second vOltagE V1 ANd V2: V2=v1+(v1−VT)*N (Eq.1), wHere Vt iS A cUTOff VoLtAge Of THe DiodeS of The charGing cells, aNd N Is The number of cHArGing cells iN thE charging pumP 10.
It Can be sEeN frOM Eq.1 thAt tHe chaRge pumP 10 Can adjUst N and geNeRAte the SEcond voLTAgE V2 of A predetermined levEL aCCording to the fiRst volTaGE V1. tHEreForE, an integraTeD circUIt comprISiNG THe cHArge pump 10 can usE the first anD SecOnd volTaGes v1 And V2 of DiffeReNT leVels simultaNeouSly.
The chaRge pumP 10 Is requiREd to not Only puLl tHe fIrst VOlTaGe V1 Up TO thE SeConD VolTage V2 of a PrEdEtermIned LEVEL, the ChaRge pUmp 10 is Also required tO keEp thE SecOnd voLtage v2 at tHe PredeTerminEd levEl Thereafter. PleasE refEr to FIG. 2, whIch Is A ciRcUit diAGram of A reGulAted chaRge pump 50 ACcoRdING To The prior art. The reguLaTED cHarge pumP 50 can noT OnLy PUll the fiRsT voLtagE v1 Up to tHe seCOnD voltage v2 of a prEDeTeRmined lEvEl, the rEgUlaTed ChargE Pump 50 Can alsO keep the SeconD Voltage V2 at the pREdetermined leVEl. tHE rEGulaTed Charge pump 50 cOmprISes a CharGE pUmp 52, AN osciLlatoR 54 cONnECted to the charge pump 52, A dIffereNtial Amplifier 56 connEcted to the OSCIllator 54, aNd a lEVeL Shift circuit 58 coNnectEd between tHE charge pUmp 52 anD the diffErential aMPLifier 56. ThE leVel ShiFt cIRCuIt 58 comprises a fIRSt inPuT end 66 conNecTed to a fIrsT reFerEncE vOltage VreF1 a second InPuT eNd 68 ConNecteD To an outpUt End 74 Of The ChargE Pump 52, an OutpuT end 64 CoNnECteD to a negATiVE InpuT eNd 70 Of thE diFfErentIal aMPliFier 56, a fiRst resistOr 60 cONnecTeD bEtween tHe first input eNd 66 And the outpUt End 64, And a seCONd resistOr 62 connected between the ouTPut end 64 aNd tHe secOnd iNput end 68. ThE diFferenTiaL AmplifIer 56 furTher cOmPriSES an ouTPUt End 76 AnD a positive INPut End 72 coNnEcteD to a secOnd reference voltagE vreF2.
The differentIal AmplIFIeR 56 ouTPuTS a cOmPAre SIGnal at the output End 76 when a voLtAGe At the negatIVe iNpUt end 70 is Lower thAn thaT At the poSitive inpUt end 72. AfteR rEceiVINg tHe compare sIgnal, the OscillatoR 54 OutpuTS aN osciLlaTion siGnAl aT an ouTput enD 78 Of tHe oscIllatoR 54. THe charGe pumP 52 cOntinues Charging a voltage at the ouTput enD 74 only WheN the chargE puMP 52 reCeives the OsciLlation sigNal.
in tHe begInnINg of oPeraTIoN, a
 42 of the charge pump 10in pumpedhighe r a ndhi gher . Pl ease refer toa n eq uation 1 of a relation  betw ee n  the fi rst a nd seco n dv o lta ge  V 1 a nd V2 : V2= V1+ (V1−Vt) *N (Eq.1),  wh er e Vt is a cu t of f voltageofthe diodes o f t he cha rg ing cells , a nd Nis the number  of charg in g  cells in thec h ar ging  pump 10.
It canb es een from Eq.1that t he ch a r gepum p 10 can a dj ust N and gen e ra t e the second voltag e V2 of a p r ede termin ed  le v el acc ordin gt o t he first vo ltag e V1. The refore ,  an int e gratedcircui t c omp risi n gth e c ha r gep um p 1 0  ca n use th efi rst a nd s e c o n d vo lta gesV1 an d V2 of diffe ren t le v els  simu ltane ousl y. 
Thecharge  pump  1 0 is required t o no t only pu llth e f ir st vo l tage V 1 u p t o the s econd v o lta ge V 2  o f a predeterminedle v e l,  the cha rge pu m p10 is alsore qui redt o  keep  the se cond vol tage V 2  a tthe pre de termin ed  le vel  ther e afte r. Ple ase refe r toF IG. 2, which i s  a circuit di a gr a m  o f  a r egu lated charg e pu m p 50  acc o rd ing to th e pri or ar t . The regulated cha rg e pump  50 c an not only p ull the fi r s t  voltage  V1u pt o the second v oltag e V2 of ap redeterm inedlevel, t he regula t e d charge  pu mp50can a ls o keep the se c o nd v ol tage V2  at  the pr ede ter min edle vel. Theregulate dch ar ge  pu mp 50 comprise sa c ha rge  pump 52, an  osci llat or  5 4  co nnected to t he c ha rg e pu mp52 , a d iffe r ent ial amp lifier 56  co n nect ed  t o the o scillator 54,  a nd a level  s hif t circ u i t 58 con nected between the char g e pump52and t he d ifferenti alamplif ier 56. Th e leve l shi ft  ci r c uit 5 8 co mpr is es a first i npu t end  6 6 co nnected  to a first refere n cevoltage Vref1  aseco n d  i npu t  e n d 6 8c onn e c ted to an outpu t end 74 o ft he  charge pu m p 5 2,  an out put end  64 c o nnected  to a neg ative inp ut  end 7 0 o f the diff erential  amplifie r  56,a  f irstres istor60  co nnect ed bet w een  thefirstin put en d 66an d the ou tput end 64, and a seco nd res istor  62  connecte d b e twe en the ou tput  end 64 an d t hesecon d i n put e nd 6 8 .The diffe rent i al amplif i er  56 f ur ther compri s e s  an  outp ute nd 76anda positive inpute nd 72 connecte d to a  se con d  ref er ence voltage V ref 2. T he diffe re ntial ampli fier 56ou t putsa comp are si gnal at t he output  end  76  when a v olt ag e  at the  n eg a tive i nput  e nd 70is low e r th a n  that at the pos itive i npute nd72. A ft er rece i ving  the compa re signal,the os cill ator54 outp ut s an o sci ll ation sign a l at an o utput  end 78  o f th e o scilla tor5 4 . The  cha rg e p ump 52 co n t in u es  c h arg inga vol ta ge a t the out p ut end 7 4 o n ly when  t hec h arge p u mp 5 2 receives  th e osc i l lation sig n al.I nt he be ginnin g of o peratio n , a 
 42_of the_charge pump 10 in_pumped higher_and_higher. Please_refer_to an equation_1 of a_relation between the first_and second voltage_V1_and V2: V2=V1+(V1−Vt)*N (Eq.1), where Vt is a cutoff voltage of the diodes of_the_charging cells,_and_N_is the number of charging_cells in the charging pump_10.
It can_be seen from Eq.1 that the charge pump_10_can adjust N_and generate the second voltage V2 of a predetermined_level according to the first voltage_V1. Therefore, an_integrated_circuit_comprising the charge pump_10 can use the first and_second voltages V1 and V2 of_different levels simultaneously.
The charge pump 10 is_required to not only pull the_first voltage V1 up to_the second_voltage V2 of a predetermined_level, the charge_pump 10_is also required_to keep the second voltage V2_at the predetermined_level thereafter. Please refer to FIG._2,_which is a_circuit_diagram_of a_regulated charge pump_50_according to_the_prior art. The regulated charge pump_50_can not only pull the first voltage_V1 up to the_second_voltage V2 of a_predetermined level, the regulated charge_pump 50 can also keep the_second voltage_V2 at_the predetermined level. The regulated charge pump 50 comprises a charge_pump 52, an oscillator 54 connected_to the charge pump_52, a_differential_amplifier 56 connected_to_the oscillator_54, and a level shift circuit 58_connected between_the charge pump 52 and the_differential amplifier 56. The_level_shift circuit 58 comprises a first_input end 66 connected to a_first reference voltage Vref1 a_second_input_end 68 connected to an_output end 74 of the charge_pump 52, an_output end 64 connected to a negative_input_end 70 of the differential amplifier_56,_a first resistor 60 connected between_the_first_input end 66 and the_output end 64, and a second_resistor 62 connected between the output end 64 and_the second input_end 68. The differential amplifier_56_further_comprises an output end 76 and a positive input end_72 connected_to a second_reference voltage Vref2.
The differential amplifier 56 outputs a compare signal_at the output end 76 when a_voltage at the negative input end 70 is lower than that_at the positive input end 72. After receiving_the compare signal, the oscillator 54 outputs_an oscillation signal at_an_output end 78 of the oscillator 54._The_charge_pump_52 continues charging_a voltage at_the output end_74 only_when the charge_pump 52_receives the oscillation_signal.
In_the beginning of operation, a