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Terry Zhang
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Join Date: Sep 2007
Posts: 3

About CF amplifier

09/25/2007 5:16 AM

Hello, Evevryone!

Could you tell me the relationship of measuring frequency, filter frequency(low past),sampling rate and carried frequency in CF amplifer?

Thanks a lot!
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Electroman
Guru
United Kingdom - Member - Olde Member!! Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jul 2006
Location: Dunstable, England
Posts: 2821
Good Answers: 45
#1

Re: About CF amplifier

09/25/2007 9:30 AM

And CF is what? Current Feedback?

The rest of your post seems to be about anti-aliasing filters before an analogue to digital convertor I guess?

Oh! maybe its a typo and you mean a CD amplifier with its analogue to digital convertion?

I'm not an audiophile but I think in a CD player the sampling rate is at 44kHz so the Nyquist frequency is half that. So with a sharp low pass cutoff filter the maximum frequency to get sampled will be less than 20 kHz.

John.... a better explanation of what you want is required.

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Terry Zhang
Participant

Join Date: Sep 2007
Posts: 3
#2
In reply to #1

Re: About CF amplifier

09/25/2007 8:45 PM

Thanks for your answers!

CF means carried frequency.
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Haajee
Guru

Join Date: Feb 2006
Posts: 1758
Good Answers: 6
#3

Re: About CF amplifier

09/26/2007 4:13 PM

It is:

"current feedback Amplifier".

See

http://en.wikipedia.org/wiki/Current-feedback_operational_amplifier

&

http://www.google.com.pk/search?hl=en&as_qdr=all&q=+%22current+feedback+Amplifier%22&btnG=Search&meta=

There is no "Carried Frequency .. " found
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Terry Zhang
Participant

Join Date: Sep 2007
Posts: 3
#4
In reply to #3

Re: About CF amplifier

09/26/2007 8:58 PM

Sorry, Sir!

I'm wrong. It is carrier frequency amplifier
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Electroman (1); Haajee (1); Terry Zhang (2)

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