Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: what's meant by coupling Posted: Mon Sep 12,
2005 4:58 am
i m an undergraduate and starting out in circuit analysis
and design and hope to go on to do something in rf field 'cause i like
it a lot. i've a very basic question to ask...when people talk about
ac coupling capacitor, what they do really mean? exactly, what does
coupling exactly mean? i know blocking cap blocks dc signal, bypass
cap open circuits the dc signal but i'm not exactly sure what's meant
by dc coupling or ac coupling.
any explanation w/ or w/o example
will help a lot! thanx
Post subject: Posted:
Mon Sep 12, 2005 6:03 am
Joined: Mon Jun
27, 2005 2:02 pm
how much the signal will pass forward from one point to another. AC
coupling is done by means of series capacitor. As the frequency increases
the reactance of the capacitor drops, according to the ratio of Xc=1/2*pi*f*C.
Post subject: Posted: Mon Sep 12, 2005 6:37 pm
hi IR, this means that a series capacitor that is used for ac coupling
is then also a dc block??
Posted: Mon Sep 12, 2005 11:30 pm
Mon Jun 27, 2005 2:02 pm
Post subject: Posted: Wed Sep 14, 2005 1:33 am
you can say DC coupling is the same as High Pass Filter.
blocked the DC and the lower Freq. and pass the higher freq.
the 3 dB point for this filter depend on the capacitor and the impedance.[/img]