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#1
03-06-2009, 01:25 AM
 hoyahoya7 New Member Join Date: Mar 2009 Posts: 1

I know that Q-point is intersection of AC load line and DC load line.

but!
I don't know why DC load line is different from AC load line.

I think that it means difference of resistance value.

WHY???????????

Help me~
#2
03-06-2009, 01:44 AM
 Papabravo Senior Member Join Date: Feb 2006 Location: Michigan, USA (GMT-5) Posts: 5,776

It is not the resistance, but the AC impedance which is frequency dependent.
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#3
03-06-2009, 02:51 AM
 hgmjr Super Moderator Join Date: Jan 2005 Location: Tennessee, USA (GMT-6) Posts: 9,030 Blog Entries: 11

To echo what papabravo has stated, a device that exhibits an ac load-line in addition to a dc load-line possesses a load impedance that is not purely resistive.

hgmjr

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