脉冲信号的产生和整形.pdf

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せせせせ4444』』』』㘸㘸㘸㘸ۡۡۡۡԐԐԐԐदददद⮳⮳⮳⮳ϖϖϖϖ
⩎⩎⩎⩎̽̽̽̽᪣᪣᪣᪣ᒑᒑᒑᒑ

ᄺд㽕⚍˖
•555ᅮᯊ఼ⱘᎹ԰ॳ⧚ঞ䘏䕥ࡳ㛑
•⬅555ᅮᯊ఼ᵘ៤ऩ〇ǃ໮䇤ǃᮑᆚ⡍㾺থ
఼ⱘᮍ⊩
せせせせ4444』』』』㘸㘸㘸㘸ۡۡۡۡԐԐԐԐदददद⮳⮳⮳⮳ϖϖϖϖ
⩎⩎⩎⩎̽̽̽̽᪣᪣᪣᪣ᒑᒑᒑᒑ

4.14.1໮໮䇤䇤ᤃᤃ㤵㤵఼఼

4.24.2ऩऩ〇〇ᗕᗕ㾺㾺থথ఼఼

4.34.3ᮑᮑᆚᆚ⡍⡍㾺㾺থথ఼఼

䗔䗔ߎߎ
4.1տໞჲӵ୶

4.1.14.1.1⬅⬅䮼䮼⬉⬉䏃䏃ᵘᵘ៤៤ⱘⱘ໮໮䇤䇤ᤃᤃ㤵㤵఼఼

4.1.24.1.2⬅⬅555555ᅮᅮᯊᯊ఼఼ᵘᵘ៤៤ⱘⱘ໮໮䇤䇤ᤃᤃ㤵㤵఼఼

4.1.34.1.3໮໮䇤䇤ᤃᤃ㤵㤵఼఼ⱘⱘᑨᑨ⫼⫼

䗔䗔ߎߎ
юԅտໞჲӵ୶ٲဎਪԨা4.1.1

໮䇤ᤃ㤵఼DŽخⱘ㞾▔ᤃ㤵⬉䏃িކ㛑ѻ⫳ⶽᔶ㛝

ȠRC⣞ᒑ้䄿ᡞ㢐஗

uo
(ui1)
0t
t1t2t3
ui2
(uo1)
0t
G1G2G
3u
u1u2uo2u3uoo2
i&i&i&
RRS0t
ui3
C
UTt
0
(a)⬉䏃೒(b)⊶ᔶ೒
uo
(u)
㄀ϔ᱖〇ᗕঞ݊㞾ࡼi1
0t
㗏䕀ⱘᎹ԰䖛⿟t1t2t3
ui2
(uo1)
0t
G1G2G
3u
u1u2uo2u3uoo2
i&i&i&
RRS0t
ui3
C
UTt
0
(a)⬉䏃೒(b)⊶ᔶ೒

೼t1ᯊࠏˈui1˄uo˅⬅0বЎ1ˈѢᰃuo1˄ui2˅⬅1বЎ0ˈuo2⬅0বЎ
1DŽ⬅Ѣ⬉ᆍ⬉य़ϡ㛑䎗বˈᬙui3ᖙᅮ䎳䱣ui2থ⫳䋳䏇বDŽ䖭ϾԢ⬉ᑇ
ᣕuoЎ1ˈҹ㓈ᣕᏆ䖯ܹⱘ䖭Ͼ᱖〇ᗕDŽֱ
೼䖭Ͼ᱖〇ᗕᳳ䯈ˈuo2˄催⬉ᑇ˅䗮䖛⬉䰏Rᇍ⬉ᆍCܙ⬉ˈՓui3䗤⏤
ϞछDŽ೼t2ᯊࠏˈui3Ϟछࠄ䮼⬉䏃ⱘ䯜ؐ⬉य़UTˈՓuo˄ui1˅⬅1বЎ
0ˈuo1˄ui2˅⬅0বЎ1ˈuo2⬅1বЎ0DŽৠḋ⬅Ѣ⬉ᆍ⬉य़ϡ㛑䎗বˈ
ᬙui3䎳䱣ui2থ⫳ℷ䏇বDŽ䖭Ͼ催⬉ᑇֱᣕuoЎ0DŽ㟇ℸˈ㄀ϔϾ᱖〇ᗕ
㒧ᴳˈ⬉䏃䖯ܹ㄀ѠϾ᱖〇ᗕDŽ
uo
(u)
㄀Ѡ᱖〇ᗕঞ݊㞾ࡼi1
0t
㗏䕀ⱘᎹ԰䖛⿟t1t2t3
ui2
(uo1)
0t
G1G2G
3u
u1u2uo2u3uoo2
i&i&i&
RRS0t
ui3
C
UTt
0
(a)⬉䏃೒(b)⊶ᔶ೒

೼t2ᯊࠏˈuo2বЎԢ⬉ᑇˈ⬉ᆍCᓔྟ䗮䖛⬉䰏Rᬒ⬉DŽ䱣ⴔᬒ⬉ⱘ䖯
㸠ˈui3䗤⏤ϟ䰡DŽ೼t3ᯊࠏˈui3ϟ䰡ࠄUTˈՓuo˄ui1˅জ⬅0বЎ1ˈ
㄀ѠϾ᱖〇ᗕ㒧ᴳˈ⬉䏃䖨ಲࠄ㄀ϔϾ᱖〇ᗕˈজᓔྟ䞡໡ࠡ䴶ⱘ䖛
⿟DŽ
䗴៤ᤃ㤵఼㞾ࡼ㗏䕀ⱘॳ಴ᰃ⬉ᆍCⱘܙᬒ⬉DŽ
ᤃ㤵਼ᳳЎ˖TĬ2.2RC
ȠCMOS้䄿ᡞ㢐஗
uo
㄀ϔ᱖〇ᗕঞ݊㞾ࡼ
㗏䕀ⱘᎹ԰䖛⿟0t
ut1t2t3
G1G2i2
(uo1)
u1uo1u2uo
i&i&0t
u
Ri1
C
UTt
0
(a)⬉䏃೒(b)⊶ᔶ೒

೼t1ᯊࠏˈuo⬅0বЎ1ˈ⬅Ѣ⬉ᆍ⬉य़ϡ㛑䎗বˈᬙui1ᖙᅮ䎳䱣uoথ
ℷ䏇বˈѢᰃui2˄uo1˅⬅1বЎ0DŽ䖭ϾԢ⬉ᑇֱᣕuoЎ1ˈҹ㓈ᣕᏆ⫳
䖯ܹⱘ䖭Ͼ᱖〇ᗕDŽ೼䖭Ͼ᱖〇ᗕᳳ䯈ˈ⬉ᆍC䗮䖛⬉䰏Rᬒ⬉ˈՓui1
䗤⏤ϟ䰡DŽ೼t2ᯊࠏˈui1Ϟछࠄ䮼⬉䏃ⱘᓔਃ⬉य़UTˈՓuo1˄ui2˅⬅0
বЎ1ˈuo⬅1বЎ0DŽৠḋ⬅Ѣ⬉ᆍ⬉य़ϡ㛑䎗বˈᬙui1䎳䱣uoথ⫳䋳
䏇বˈѢᰃui2˄uo1˅⬅0বЎ1DŽ䖭Ͼ催⬉ᑇֱᣕuoЎ0DŽ㟇ℸˈ㄀ϔϾ
᱖〇ᗕ㒧ᴳˈ⬉䏃䖯ܹ㄀ѠϾ᱖〇ᗕDŽ
uo
㄀Ѡ᱖〇ᗕঞ݊㞾ࡼ
㗏䕀ⱘᎹ԰䖛⿟0t
ut1t2t3
G1G2i2
(uo1)
u1uo1u2uo
i&i&0t
u
Ri1
C
UTt
0
(a)⬉䏃೒(b)⊶ᔶ೒

೼t2ᯊࠏˈuo1বЎ催⬉ᑇˈ䖭Ͼ催⬉ᑇ䗮䖛⬉䰏Rᇍ⬉ᆍCܙ⬉DŽ䱣ⴔ
ᬒ⬉ⱘ䖯㸠ˈui1䗤⏤ϞछDŽ೼t3ᯊࠏˈui1ϞछࠄUTˈՓuo˄ui1˅জ⬅0
বЎ1ˈ㄀ѠϾ᱖〇ᗕ㒧ᴳˈ⬉䏃䖨ಲࠄ㄀ϔϾ᱖〇ᗕˈজᓔྟ䞡໡
ࠡ䴶ⱘ䖛⿟DŽ

㢹UT˙0.5VDDˈᤃ㤵਼ᳳЎ˖
TĬ1.4RC
Ƞⴢ㠠ᮥ҂้䄿ᡞ㢐஗
X⬉ᛳᗻ
R1C2R2
f0
⬉ᆍᗻf
C10
&&uo

(a)⷇㣅᱊ԧ໮䇤ᤃ㤵఼(b)⷇㣅᱊ԧ䰏ᡫ乥⥛⡍ᗻ

䰏R1ǃR2ⱘ԰⫼ᰃֱ䆕ϸϾডⳌ఼೼䴭ᗕᯊ䛑㛑Ꮉ԰೼㒓ᗻᬒ໻⬉
ऎDŽᇍTTLডⳌ఼ˈᐌপR1˙R2˙R˙0.7k¡̚2k¡ˈ㗠ᇍѢCMOS
䮼ˈ߭ᐌপR1˙R2˙R˙10k¡̚100k¡˗C1˙C2˙Cᰃ㗺ড়⬉ᆍˈ
ᅗӀⱘᆍᡫ೼⷇㣅᱊ԧ䇤ᤃ乥⥛f0ᯊৃҹᗑ⬹ϡ䅵˗⷇㣅᱊ԧ