Anyone seen this type of spike before on their pi plates? Messing around with my new scope and i'm thinking this spike shouldn't be there. Please let me know your thoughts as I am travelling for a couple weeks but would love to have some input while on the road. Also any idea why one trace is clean and the other is noisy?
[img:800:479]http://chicagocadcam.com/ChrisHahn/xen10/PIplates.jpg[/img]
scope trace question
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fperron_kt88
- Posts: 72
- Joined: Wed Oct 10, 2007 2:19 pm
- Location: Montreal
Re: scope trace question
Hello surfsup,
Yup, got the same thing a while back. See this thread: http://ampgarage.com/forum/viewtopic.ph ... c&start=15
In the youtube vid, you see the trace in question: http://www.youtube.com/watch?gl=CA&hl=en&v=TRfByCL74rM
Since the blip is on only one polarity of the PI outputs, the trick is to use the other polarity so this part is not contributing any signal in the following class AB stage...
If my memory serves me properly, the signal appearance was related to a change in the bias of the PI under grid conduction.
Yup, got the same thing a while back. See this thread: http://ampgarage.com/forum/viewtopic.ph ... c&start=15
In the youtube vid, you see the trace in question: http://www.youtube.com/watch?gl=CA&hl=en&v=TRfByCL74rM
Since the blip is on only one polarity of the PI outputs, the trick is to use the other polarity so this part is not contributing any signal in the following class AB stage...
If my memory serves me properly, the signal appearance was related to a change in the bias of the PI under grid conduction.
...
Re: scope trace question
Awesome dude. Thanks. I'll research your thread this week as i'm in toronto for the canadian manufacturing show.