1、9 180 2009 M 6 s / 0 Ship Electronic EngineeringVol. 29 No. 6191 CMOS # s * y 1) 2) S 3) 4)( E 2 1) 2 330013)(Z + v 2) q 430033)( Y v 3) 2 330011) (Z + 92301 4) 100841)K 1 i M 1 F , G B q 1 1 “ 7 1 b ) MOS / M a i ? Z E ! 9 / “ 1 i l b c e 1 CM OS ( NMOS ) ,s ) s bv ,i T + , # B z E F b1 o M ; s b;
2、m s | TN713Analysis of CMOS Current Mirrorps Principle and PracticeHuang Jianhua1) Jiang Wei2) You Guoping3) Cheng Wenchao4)( Jiangxi Just ice Police Vocational College1) , Nanchang 330013)( Naval University of Engineering2) , Wuhan 430033)( Inst itute of Technology, East China Jiaotong University3)
3、 , Nanchang 330011)( No. 92301 Troops of Navy4) , Beijing 100841)Abstract Current mirror is a basic form in the analog int egrat ed circuits, which consists of two or more parallel currentbranches. They are in proportion on certain rat io relationship each other. Research and discussion on CMOS circ
4、uit m irrorpstheory and technology is of important significance. This paper introduces CMps basic principle simply(based on NMOS CM),analyses its application in difference amplifier and demonstrates its characteristics, and discusses a kind of high2swing CMst ruct ure.Key words current mirror, diffe
5、rential amplifier, active loadsClass Number TN7131 ( CM) E “ K B , B ? | B I C b ? , $ E “ q , E “ K W / B b “ - , s b # | ) W / 1 b “ , V s MOS b MOS 1 “ ( CMOS B f / 1/ 3 1/ 5) , O T N P 5 L C ,y N , CMOS B b e CMOS F # 1 ) b ,i s T * l : 2008 M 9 25 , : 2009 M 11 4 T e : y , q , Z _ : 0 / b S , =
6、 , Z _ : 0 / b192 y : CM OS # s 9 180 # + b2 MOS E “ b T P MOS 8 5 # ) T b 4 M 1 T b Y f / , v s E “ MOS 8 5 , T 5 , 5 T u b 2m 1 NMOS MOS5 MOS 5 F b 9 N MOS 5 m 1 U ( Mr M1 F )b T : Mr I I r B H , M1 E VGS1 B , v l M1 q % by NMOS 8 5 E B , H 9 M , ,M1 M2 VGS M , 9 , Ir M1 VGS1 M2 4 VGS2b VDS1= VGS1
7、, M1 bL ! VDS2 E VGS2VTN2 , O VDS2v VTN2, 5 M2 9 T u b ,G u f Z , I Ir I o 1 “ n / TIoIr =KcN # (W/L)2 # (VGS2- VTN )2KcN # (W/L)1 # (VGS1- VTN )2 =(W/L)2(W/L)1I n q B H q / T , y 0 KNM , VTN9 M b T M1aM2 ! 9 M , M1aM2 j M , (W/L)2 = (W/L)1 ,5 I Ir Io M , b T M1 M2 j ! 9 M , f Z V , I Ir I o 1“ I o/
8、Ir= (W/L)2 /(W/L)1 , 1 M2aM1 8 5 z 1 1 b T ,5 1 NMOS 8 5 z 1 1 , + 1 bIr B Io1 B Io2 BIo3 B , BIon= (W/L)r B (W/L) 1 B( W/ L)2 B( W/ L)3 B , B( W/ L)n T V n ,Y V MOS5 z 1 !9 , V I 1 1 “ , E “ ) bv 1 bIr /Io j 1 f , j 1 ! 9 = V e b e T I NMOS 5 NMOS5 V C I/V1 “ , m 2:m 2 T w Lm 3 = ) s b I NMOS5 Mr ,
9、 VDS = VGSb N Z p M w L , m 2( a) U b7 NMOS 5 N m 2(b) U I2V1 “ , NMOS 8 5 + w L VGS = Vc * B b E , !9 , - 4 X i B V , y M 7 P ? 3 M bL ! X i , * T I n r T ,5 T u q VDS 1 , 9 y VDS 7 3 1 bIo Ir 1 q j 1 q % , V e S = b 1 o + , V 7 s Y ,y N $ W T E 3b3 CMOS CM s b ! ! , 1 E “ b, l 10pA / , 1 p , y N P
10、 4 b T s2009 M 6 s / 0 193 5 bm 3 U B ) bv m , m b ( c bm 5 0 9 MOS5 bM1aM2 M7 5 1 b ER M15 F s b , 4 Irb X M1 5 7 - 4 / , E V p Ir, B Ir | S 20 200LAb M1aM2 M7 5 j , V M2 M7 5 P , bv 4 b ) bv b B ) P 5 M3 M4 bv 5 aN 5 M 5 M6 , T a s bv b ) P H b = ) V M8 E , E d v ,y 7 ? , E F 7 !9 , a r 5 b C M T
11、4 b E l E v , y N$ W bv a “ bv bv , P bv ) 9 m M ,i P ? S b4 z E F 1 X ,A ? b E , ! 9 B a E F , m 4 U bm 4 L = B E bN z E MOS 5 M1aM2aM3aM4aM5aM6 = 5 M MOS 5 M7 F bM1aM3 T B = 5 M 8 5 b E MOS 5M3aM4 M6 E V = 5 M 85 M7 b N M , P z E M10aM11aM14aM15 M18 bMOS 5 M14M15 T B = 5 M 8 5 b E 8 5 M10 M14 E 1
12、= 5 M 8 5 M18bM1 M6 8 , M10aM11aM14 M15 , M7 M18 , M14 s M18 b Vaa Vbbb VDD h l , * M14 E M h , “ M14 V V VDD2$V2Vth9 F VDD2$VbM18 E M14 E ( 5 0 S B A , a M ), :(VGS)M18 = ( VG) M14 = ( VDS)M15 + ( VGS )M14 EVGS - Vth + VGS( 5 0 ( ) , # VDS EVGS - Vth )# : $VM18= (VGS )M18- Vth E2VGS - 2Vth u Z 28 :
13、ID = 12 LPCOXWL ( VGS - Vth )2 ( I n r )V : WLM18F 14 WLM14 4 ? , 5 0 ! 9 M z 1 bM10aM11aM14 M15 z 1 M ,i 1 v M18 z 1 4 b “ , N E , M1aM2aM3aM4aM5 M6 z 1 M , i v M7 z 1 4 b 8 j _ T% , r “ b T , V ? ) u 7 u , 1 | / 0b ! 9 V M7 M14 E s Y P 5 N 5 T b5 CMOS “ P L “ ! 9 e , / :1) P H q / 9 EF ; 2) z S =
14、, E F S =194 y : CM OS # s 9 180 M ; 3) 7 3 1 b # + ? , E “ W b “ - V , X bv , V2I I2V M , r o , , A/ D D/A ,1 n “ d , * # d L 5 b I D 1 , n 1 . CMOS # J. 2 v , 1996 , 23( 1) 2 . E “ $ M . : b v , 2003 3 8 # = . E CMOS “ ! 9 M . : Y v , 2004 4 . VLSI ! 9 $ M. : 0 , 2002( 183: )m 3 q “ d q v a | S z
15、a H + , s “d | Z E # p “ 3 # p M o , # p ,s # p E b| k k ! ! M , 9 w a e , q M , L C v q! ! 1 “ as ) a ai% , ? a | # p q q b2) s “ d : o e b Y “ d ? - 4 , V ? V ? # p 5 b s “ d Y ! + a T a | e 1 “ a# p 5 M a#p q s u , b d 9 ZE , p a f / 4 q s f P( R/ H1) , P( R/ H0) , 8 I n P q K b3) o s “ d : s 1 !
16、 9 o a# p _ o s “ d o o b o i Y ! b / v 0a/ q 0 / 5 0s Q : v a ba aCPU ; q q as q “ v ; 5 v q 5 b# p _ o i # p _ 1 b Z L n , # p C s ) F : # p 0 # p b B 0 # p / B _ , i _ ,s d b s “ d o i , o a a E a | a q b4) ? : s 1 L C 9 m q m A U b Y ! / c a e a a 4 , # | m aZ m a m i 9 ,i ? k 1 # A U ,L 4 , s #
17、 p , k ,V 7 E “ b5) “ d L , s “ d P q T q b5 e Y ! # p _ , # p _ q q W % ! 9 Z , PXI E k N Labview m 7 ? , L C 1 Y ! # p _ b ? a a | # p a B q B v , P ( # p ? C HW v v ,i O P T Z L , # p s , a S , F Z a k y a8 l a z a V L , Y ! y _ = L N b I D 1 Wooldbrige M. Agent2Based Software Engineering J .IEEE
18、 Trans on Software Engineering,1997, 144(1): 26 27 2 N M , , ! . Q s J . v , 1993, 21( 1) : 6 12 3 Fin in T, Labrou Y. KQM L as an agent communicat ionlanguage M . Bradshaw JM editor. Software Agents,MIT Press, 1997: 291 316 4 Shoham Y. Agent oriented programming M . NewYork: Prentice Hall, 1989 5 , | 0 , . ? Agent # p “ d J. T M Y ? , 2000,13(1): 78 81
