【判断题】【消耗次数:1】
对恒带宽比滤波器,中心频率越高,带宽越大。()
正确
错误
参考答案:
复制
纠错
相关题目
【单选题】 允许低于某一频率的信号通过的滤波器是( )。
①  高通滤波器
②  带通滤波器
③  低通滤波器
【单选题】 允许低于某一频率的信号通过的滤波器是( )。
①  高通滤波器
②  带通滤波器
③  低通滤波器
【单选题】 用一个截止频率为w1的低通滤波器和一个截止频率为w2的高通滤波器,构成一个带通滤波器,应当使()。
①  二者串联,并且w1w2
②  二者并联,并且w1w2
③  二者并联,w1w2
④  二者串联,w1w2
【判断题】 有用信号频率高于1000Hz,可选用高通滤波器。
①  正确
②  错误
【单选题】 滤波器的截止频率定义为频率下降( )那一点所对应的频率。
①  2Db
②  3Db
③  4Db
④  5Db
【单选题】 滤波器的截止频率定义为频率下降( )那一点所对应的频率。
①  2Db
②  3Db
③  4Db
④  5Db
【判断题】 若一选频滤波器的幅频特性是:在0~fc之间接近常数,在fc~∞之间急剧衰减。该滤波器为高通滤波器。()
①  正确
②  错误
【判断题】 滤波器的功能是对频率进行选择,过滤掉噪声和干扰信号,即有用频率信号通过,无用频率信号被抑制的电路。
①  正确
②  错误
【判断题】 滤波电路(滤波器)是一种选频装置,可以使信号中特定的频率成分通过,而极大地衰减其他频率成分。
①  正确
②  错误
【单选题】 六类双绞线电缆最高频率带宽为( )。
①  100MHz
②  200MHz
③  250MHz
④  600MHz
随机题目
【单选题】 The organization has developed several techniques useful to other groups ____ the similar work.
①  to do
②  do
③  does
④  doing
【单选题】 ____ it is you found, you must give it back to the person it belongs to.
①  That
②  Because
③  Whatever
④  However
【单选题】 If you don’t think it necessary to make ____ any missed lessons, speak up now.
①  up for
②  up with
③  up to
④  away for
【单选题】 No sooner had he sat down to lunch ____ there was a knock at the door.
①  when
②  that
③  as
④  than
【单选题】 When the teacher had ____through with the class, they felt very ashamed.
①  gone
②  got
③  done
④  taken
【单选题】 “Which of these two ties will you take?” “I’ll take ____to give me a change sometimes.”?
①  either ?
②  both ?
③  neither ?
④  all?
【单选题】 No one, except his two best friends ____his joy or sorrow in his life.
①  shares
②  share
③  sharing
④  to share
【单选题】 He would like to view difficulties ____ a kind of challenge.
①  with
②  on
③  of
④  as
【单选题】 As a result of the unfavorable working conditions, the project has to be put off____.
①  temporarily
②  tremendously
③  traditionally
④  typically
【单选题】 1.—Did you accept his invitation? — ____bet I did.
①  I
②  You
③  People
④  They