在图10.23(a)所示的滞回比较器中,已知集成运算放大器的输出饱和电压UOM=9V,uI=8sinωtV,UR=3V,R2=1kΩ,RF=5kΩ
在图10.23(a)所示的滞回比较器中,已知集成运算放大器的输出饱和电压UOM=9V,uI=8sinωtV,UR=3V,R2=1kΩ,RF=5kΩ。求该电路的上限和下限触发电压、滞回宽度以及uO的波形。
在图10.23(a)所示的滞回比较器中,已知集成运算放大器的输出饱和电压UOM=9V,uI=8sinωtV,UR=3V,R2=1kΩ,RF=5kΩ。求该电路的上限和下限触发电压、滞回宽度以及uO的波形。
第1题
"Do you hear someone knocking at the door?" "Yes, I did. I heard him ______ three times."
A.knocking
B.knocked
C.being knocking
D.knock
第2题
"Do you hear someone knocking at the door?"
"Yes, I did. I heard him ______ three times."
A. knocking
B. knocked
C. being knocking
D. knock
第3题
I have made a(n) ______ for you to see the doctor at 8 o'clock tomorrow.
A.appointment
B.interview
C.opportunity
D.assignment
第4题
I have something important to talk over with you. Can you ______ to be here at 8 o'clock?
A.conceive
B.manipulate
C.assume
D.contrive
第5题
This parking sign tells you that you can park your car here for _________ hours between 8 o'clock to 17 o'clock.
第6题
[A] knocking
[B] knocked
[C] being knocking
[D] knock
第7题
At three o'clock this morning, I seemed______someone screaming in the street.
A.hearing
B.having heard
C.to have heard
D.to hear
第8题
A.Biology class at 8 o'clock and English class at 11 o'clock.
B.Nursing class at 8 o'clock and English class at 11 o'clock.
C.Biology class at 8 o'clock and nursing class at 11 o'clock.
D.Nursing class at 8 o'clock and biology class at 11 o'clock.
第10题
A.knock
B.knocking
C.to knock
D.knocked
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!