Is it possible to design a Gm-C filter operating above GHz?
Regards,
lcg22
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.
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.
