High-speed Gm-C tuning

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C327S552000

Reexamination Certificate

active

07019586

ABSTRACT:
A technique to achieve high-speed tuning of a Gm-C circuit, such as, for example, a Gm-C filter. In one embodiment, a master Gm-C time-constant circuit incorporates at least one element (either a transconductance or a capacitance) that is matched to a corresponding element (transconductance or capacitance) in the (slave) Gm-C circuit. A waveform generated by the master Gm-C time-constant circuit is used to control a sampler. In one embodiment, the sampler samples a precision counter so as to result in a sampler output having a polarity that steers the tuning voltage in the necessary direction. A tuning control stage coupled to the sampler output implements an algorithm that causes the tuning voltage to converge, with a predetermined precision, to the desired tuning voltage.

REFERENCES:
patent: 5245646 (1993-09-01), Jackson et al.
patent: 5625317 (1997-04-01), Deveirman
patent: 5635884 (1997-06-01), Fujii
patent: 5715529 (1998-02-01), Kianush et al.
patent: 5793251 (1998-08-01), Fujii
patent: 5825265 (1998-10-01), Fujii
patent: 5912583 (1999-06-01), Pierson et al.
patent: 5914633 (1999-06-01), Comino et al.
patent: 5945889 (1999-08-01), Shanthi-Pavan et al.
patent: 6317016 (2001-11-01), Kuo
patent: 6574288 (2003-06-01), Welland et al.
patent: 6677814 (2004-01-01), Low et al.
patent: 6842710 (2005-01-01), Gehring et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

High-speed Gm-C tuning does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High-speed Gm-C tuning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-speed Gm-C tuning will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3566223

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.