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Is it possible to design a Gm-C filter operating above GHz?

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lcg22

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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
 

bastos4321

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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
 

lcg22

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bastos4321 said:
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.
 

xshou

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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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