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QVCO test buffer match (Read 2353 times)

yhq0413 New Member Offline Posts: 6	QVCO test buffer match Jan 16^th, 2008, 10:57pm I designed a QVCO, the frequency is 4G,now I need a test buffer to evaluate it Does the test buffer need to match 50Ω? I know the test buffer for LNA must match 50Ω?I think the QVCO test buffer need not,but I am not sure. Does the buffer that does not match 50Ω affect the phase noise and other performances?
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Stefan

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Re: QVCO test buffer match
Reply #1 - Jan 17^th, 2008, 12:21am

How do you want to measure it and WHAT do you want to measure ?

For amplitude performances (gain, swing, etc.) a matching to your measurement equipment is important,
for time measurements (frequency, PN,etc.) it's unimportant as long as you've got a sufficient output swing and no reflections ...

(That should answer your question.)

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yhq0413 New Member Offline Posts: 6	Re: QVCO test buffer match Reply #2 - Jan 17^th, 2008, 2:39am for time measurements (frequency, PN,etc.) it's unimportant as long as you've got a sufficient output swing and no reflections ... �no reflections� means match,but you say match is unimportant,why?
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