Great!! Now I understand, at least, somewhat, what the freakin' "image" signal is!
@zhengguosun2962
5 жыл бұрын
thank you for the lecture. one thing i don't quite get is the absolute bandwidth of the BAND PASS filter. why is the absolute bandwidth of BPF is directly related to the filter's distance from the base-band? also, could you explain what is the absolute bandwidth? I tried to google its concept, end up in vain. thank you so much
@DuyNguyen-xb7gf
4 жыл бұрын
Learn about q-factor
@kervinsingh6213
3 жыл бұрын
from wikipedia page: en.wikipedia.org/wiki/Superheterodyne_receiver#IF_bandpass_filter "First, it is easier and less expensive to get high selectivity at a lower frequency. For the same bandwidth, a tuned circuit at a lower frequency needs a lower Q. Stated another way, for the same filter technology, a higher center frequency will take more IF filter stages to achieve the same selectivity bandwidth. "
@zaikenv
3 жыл бұрын
@@DuyNguyen-xb7gf I don't see how it applies...
@yeli9870
11 ай бұрын
2:37 Hi professor, does very low intermediate frequency in heterodyne detection mean it is basically homodyne detection?
@martinmulligan4327
Жыл бұрын
Your going to need some very high order Image rejection filter
Пікірлер: 16