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Is high frequency rising-up OK?
Is high frequency rising-up OK?
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Old 4th August 2007, 12:54 PM   #1
Peter Huang is offline Peter Huang  Taiwan
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Default Is high frequency rising-up OK?

I am studying an audio preamp. The following diagram is the simulation of ac frequency response when the circuit gain is set to be very high. I am afraid the condition will result any kind of disaster, such as break speakers. Any suggestion will be appreciated.
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Old 4th August 2007, 06:40 PM   #2
Nelson Pass is offline Nelson Pass  United States
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Is high frequency rising-up OK?
A circuit with that big a peak might become an oscillator under
some conditions. Even if it doesn't, usually a peak like that
has an audible signature.

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Old 4th August 2007, 06:56 PM   #3
anatech is offline anatech  Canada
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Is high frequency rising-up OK?
Hi Peter,
That will most likely break into oscillation on some portion of the signal. It may be much worse in real life also.

I think Nelson was making an understatement when he said ....
Quote:
Even if it doesn't, usually a peak like that
has an audible signature.
-Chris
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Old 4th August 2007, 11:32 PM   #4
Peter Huang is offline Peter Huang  Taiwan
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Thanks a lot.
Now I know what it means.
I may take a try specially carefully, step by step.
Thank you very much.

Regards,
Peter Huang
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