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lcg22
Joined: 10 Sep 2002
Posts: 103
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 22 Mar 2003 20:48 Is it possible to design a Gm-C filter operating above GHz? |
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I am required to propose a topic for pursuing M Eng. My supervisor suggests me to do some research on this topic. To my knowledge, it's almost impossible to design a Gm-C filter operating at such a high frequency. Anyone could give me some suggestion? Thank a lot.
Regards,
lcg22
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bastos4321
Joined: 01 Jan 1970
Posts: 334
Helped: 24
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| 23 Mar 2003 1:32 |
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The higher frequency that I have seen is about 400MHz, but depends on the filter order that you want to design.
Check this:
Seng-Pan U, R.P.Martins, J.E.Franca, “A 2.5 V, 57 MHz, 15-Tap SC bandpass interpolating filter
with 320 MHz output sampling rate in 0.35µm CMOS,” in ISSCC Digest of Technical Papers, Vol.45,
pp380-381, San Francisco, USA, Feb. 2002.
Regards, bastos
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lcg22
Joined: 10 Sep 2002
Posts: 103
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| 23 Mar 2003 6:24 |
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| bastos4321 wrote: |
The higher frequency that I have seen is about 400MHz, but depends on the filter order that you want to design.
Check this:
Seng-Pan U, R.P.Martins, J.E.Franca, “A 2.5 V, 57 MHz, 15-Tap SC bandpass interpolating filter
with 320 MHz output sampling rate in 0.35µm CMOS,” in ISSCC Digest of Technical Papers, Vol.45,
pp380-381, San Francisco, USA, Feb. 2002.
Regards, bastos |
Thanks, bastos.
I do search the literature for related subject, however, as the one you listed, all of the papers present filters operating at a frequency less then GHz.
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xshou
Joined: 17 Aug 2002
Posts: 45
Helped: 3
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| 23 Mar 2003 21:20 |
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bastos & lcg22,
I made a gm-c filter 4 years ago, 5th order, with highest BW 500MHz, for hard drive read channel. It's in .25u CMOS.
To operating over 1GHz, you'd better use <=.18u CMOS, or if you like, try SiGe. I don't see any reason why it can't.
I would like to recommend:
Y. Tsividis for a complete treatment of this topic
Nauta, Abidi for high speed design issues (early 1990)
It seems the design is kind well defined. You won't have too much room to dance.
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