Title: ????
1??????(?15?)
- ??
- ????
- ?16?
- ???
- ????????????
- ?17?
- ??/????
- ????????
- ?18?
- ??
2??????????
???????????6?,??????????????????http//front.sj
tu.edu.cn/sunwq/dc06/
3????
- ??????????
- ??????
- ?????
- 555???????
4??????(Schmitt Trigger)
VIN2.5VVTH
??????G1??????,????
??????G2??????,????
????????????
??G1????????
5??????(Schmitt Trigger)
VINVTH
????????????
??G1????????, ????????????
????????????
6??????(Schmitt Trigger)
VINVTH
????????????
??G1????????, ????????????
????????????
?G1?G2?????,vI?????VTH Vo?0,??
vIR2VTH/(R1R2)
VT
???????????
7??????(Schmitt Trigger)
VINVTH
????????????
??G1????????, ????????????
????????????
?G1?G2?????,vI?????VTH Vo?1,??
VT-
???????????
8??????
- ???????????????
- ????VT?????,??????
- ???????????????
- ????VT-?????,??????
???????!
VTR2VTH/(R1R2)
VT- VT-VDDR1/R2
9?????????????
VTR2VTH/(R1R2)
VT- VT-VDDR1/R2
VT
VT-
10???????????
????
11?????????
??????????
?????????????
12(No Transcript)
13????
- ??????????
- ??????
- ?????
- 555???????
14??????
- ?????????
- ??????(????????)
- ?????????????????????
- ???RC???????????
15??????????
?????
????????RC??
16????
- ??????????
- ??????
- ?????
- 555???????
17?????
?????6tpd
18?????
19????
- ??????????
- ??????
- ?????
- 555???????
20555???????
?????SR???
21555???????
?????VI
?VIgtVI-?,??1 ?VIltVI-?,??0
VI- ?????
???????? ????????
b??? ????? c??
b???? ?? ?e
b???? ?? ?e??
22555???????
?VCO???????2/3Vcc
RS??? RS??? ?? ??
RD vI1 vI2 S R vo TD??
0 x x x x ? ??
1 gt2/3Vcc gt1/3Vcc 1 0 ? ??
1 lt2/3Vcc gt1/3Vcc 1 1 ?? ??
1 lt2/3Vcc lt1/3Vcc 0 0 ? ??
1 gt2/3Vcc lt1/3Vcc 0 1 ? ??
?VCO???????1/3Vcc
23?555???????????
2/3Vcc
1/3Vcc
24?555???????????
tw
2/3Vcc
tw???RC???
??????vo0
25?555??????????
26??
- Digital Fundamentals
- ?8?34?35
- ??????(??)
- ?6?6.29 (?6????????)