OP Amp output Impedance - RF Cafe Forums
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Below are all of the forum threads, including all the responses to the original posts.
Post subject: OP Amp output Impedance
Unread postPosted: Wed Feb 16, 2005 1:58 am
I want to ask if it is correct to measure Op-Amp output impedance by measuring S22 with Network Analyzer
Unread postPosted: Wed Feb 16, 2005 8:38 am
The answer is yes, but just be sure you do not exceed the DC voltage input level to the network analyzer.
Unread postPosted: Tue Apr 05, 2005 1:13 am
I agree with Brad. just wanna add, probably it's safer to use attenuator at the port 2 of network analyzer.
Post subject: Output impedance
Unread postPosted: Fri Apr 08, 2005 12:10 pm
The assumption made in the previous responses is that you want the closed-loop output impedance (of the entire circuit), not the intrinsic output impedance of the operational amplifier (by itself).
Is this a correct assumption?