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| what's meant by coupling - RF Cafe Forums | ||||||
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Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
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Below are all of the forum threads, including all the responses to the original posts. guest 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 Top IR Post subject: Posted: Mon Sep 12, 2005 6:03 am Site Admin Joined: Mon Jun 27, 2005 2:02 pm Posts: 373 Location: Germany Coupling means 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. _________________ Best regards, - IR Top guest 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?? Top IR Post subject: Posted: Mon Sep 12, 2005 11:30 pm Site Admin Joined: Mon Jun 27, 2005 2:02 pm Posts: 373 Location: Germany Exactly!! _________________ Best regards, - IR Top YZ-israel Post subject: Posted: Wed Sep 14, 2005 1:33 am you can say DC coupling is the same as High Pass Filter. It will 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] Posted 11/12/2012 | ||||||
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