【简答题】设计一个输出功率为20 W的扩音机电路,若用乙类OCL(即双电源)互补对称功放电路,则应选PCM至少为_________W的功率管两个。
【单选题】What can we learn about the man?
A.
He was reluctant to ask for help.
B.
He has some personal problem.
C.
He had expected to be invited.
D.
He came up with a good idea.
【单选题】Even though he was sick, he was reluctant to go to the doctor. reluctant means:
【简答题】设计一个输出功率为20W的扩音机电路,若用乙类OCL互补对称功放电路,则应选两个PCM至少为__________W的功率管。
【简答题】设计一个输出功率为20W的扩音机电路,用乙类互补对称功率放大,则功放管的Pcm应满足____W。
【单选题】{设计一个输出功率为20W的扩音机电路,若用乙类推挽功率放大电路,则应选至少为( )W的功放管两个。}
【简答题】设计一个输出功率为20W的扩音机电路,若用乙类OCL互补对称功放电路,则应选两个P CM 至少为______W的功率管。
【单选题】设计一个输出功率为20W的扩音机电路,若用乙类双电源互补对称功放电路,则应选至少: