MÔN : KĨ THU T ĐO L NGẬ ƯỜ
Đ TÀI: THI T K VOM DÙNG C C U HI N Ề Ế Ế Ơ Ấ Ể
TH KIM VÀ OPAMPỊ
GVHD:NGUY N CH NG Ễ ƯƠ
Đ NHỈ
SVTH: NHÓM 5
1.NGUY N ĐÌNH Đ C NHÃỄ Ứ
2.NGUY N PH NG VŨỄ ƯƠ
3.TR N Đ C CHÂU TOÀNẦ Ắ
4.TR N VĂN VŨẦ
5.LÊ HUY TU NẤ
TRÌNH BÀY :
1. THI T K M CH ĐO ÁP DC B NG Ế Ế Ạ Ằ
OPAMP (Lê Huy Tu n)ấ
2. THI T K M CH DÒNG DC B NG Ế Ế Ạ Ằ
OPAMP (Nguy n Ph ng Vũ)ễ ươ
3. THI T K M CH ÁP AC B NG OPAMP Ế Ế Ạ Ằ
(Tr n Văn Vũ)ầ
4. THI T K M CH ĐO ĐI N TR B NG Ế Ế Ạ Ệ Ở Ằ
OPAMP (Tr n Đ c Châu Toàn)ầ ắ
5. MÔ PH NG M CH (Nguy n Đình Đ c Ỏ Ạ ễ ứ
Nhã)
Ý T NG THI T K BAN Đ UƯỞ Ế Ế Ầ
Ω=
kR
m
2000
AI
µ
50
max =
THI T K M CH ĐO ÁP DC:Ế Ế Ạ
•Ý T NG:ƯỞ
• S d ng 1 OPAMP đi n t đ ngăn dòng qua c ử ụ ệ ử ể ơ
c u,ta thi t k sao cho Vấ ế ế o=Vin
• Khi thi t k m t VOM nhi u t m đo ta cho t m ế ế ộ ề ầ ầ
đo nh nh t tr c ti p qua OPAMP đ xác đ nh ỏ ấ ự ế ể ị
dòng Imax qua c c u .Imax s có giá tr c đ nh ơ ấ ẽ ị ố ị
v i t t c các t m đo.ớ ấ ả ầ
•Khi mu n m r ng thành nhi u t m đo ta ph i ố ở ộ ề ầ ả
dùng thêm đi n tr đ phân áp qua đó nh m cho ệ ở ể ằ
đi n áp qua OPAMP c đ nh là đi n áp c a t m ệ ố ị ệ ủ ầ
đo nh nh t.ỏ ấ
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