单项选择题
A.直流负反馈 B.交流正反馈 C.交流负反馈 D.直流正反馈
电压u=220sin(314t-π/4)V的初相角为()A.314t-π/4B.-π/8C.-π/4D.π/4
单项选择题电压u=220sin(314t-π/4)V的初相角为()
A.314t-π/4 B.-π/8 C.-π/4 D.π/4
对于共发射极接法的NPN型三极管工作在截止区的偏置条件是()A.发射结反偏,集电结反偏B.发射结正偏,集电结反...
单项选择题对于共发射极接法的NPN型三极管工作在截止区的偏置条件是()
A.发射结反偏,集电结反偏 B.发射结正偏,集电结反偏 C.发射结反偏,集电结正偏 D.发射结正偏,集电结正偏
与十进制数23.456最接近的二进制数是()A.10111.0101B.11011.1111C.11011.0...
单项选择题与十进制数23.456最接近的二进制数是()
A.10111.0101 B.11011.1111 C.11011.0111 D.10111.0111