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
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. "
Very well explained, thank you.
Finally, I understand. Subscribed. Thank you.
2:37 Hi professor, does very low intermediate frequency in heterodyne detection mean it is basically homodyne detection?
Great explanation Sir
Nicely explained. Thanks.
Great!! Now I understand, at least, somewhat, what the freakin' "image" signal is!
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
Learn about q-factor
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. "
@@DuyNguyen-xb7gf I don't see how it applies...
Your going to need some very high order Image rejection filter
Thinks sir , this is great
Well done
good explanation thank you!
Gracias Prof~
good, thank you
than you