Minimizing switching noise and its effects in auto-zeroed...

Amplifiers – With periodic switching input-output

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C330S069000

Reexamination Certificate

active

07382183

ABSTRACT:
Two nulling amplifiers are used with an auto-zeroed differential amplifier. While one nulling amplifier is compensating the main amplifier, the other nulling amplifier is being zeroed for both differential mode (DM) and common mode (CM) offsets. By using two nulling amplifiers, one always connected to the main amplifier, a relatively constant open-loop gain is maintained for the main amplifier. A further improvement is make-before-break timing overlap of the switch operations between the two nulling amplifiers and the main amplifier. This ensures that the main amplifier is continuously driven by one or both null amplifiers, thereby maintaining a low impedance at the main amplifier auxiliary port. Both DM and CM offset sampling and precharging of each of the two nulling amplifiers is performed so as to substantially reduce switching glitches in the output of the main amplifier.

REFERENCES:
patent: 6653895 (2003-11-01), Douts et al.
patent: 6734723 (2004-05-01), Huijsing et al.
patent: 7265615 (2007-09-01), Alexander 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

Minimizing switching noise and its effects in auto-zeroed... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Minimizing switching noise and its effects in auto-zeroed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Minimizing switching noise and its effects in auto-zeroed... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2800135

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