Filter system with reduced switch thermal noise and a...

Details Filter system with reduced switch thermal noise and a... Filter system with reduced switch thermal noise and a...

2005-03-08

2005-03-08

Fan, Chieh M. (Department: 2634)

Pulse or digital communications

Pulse code modulation

Differential

C341S143000

Reexamination Certificate

active

06865230

ABSTRACT:
A filter system with reduced switch thermal noise includes an input circuit for receiving an input signal and a feedback signal and providing a signal representative of the difference; a filter circuit including at least an input sampling capacitor and switch which introduce thermal noise error; a feedback circuit responsive to the filter circuit for delivering to the input circuit the feedback signal; the input circuit also amplifying the difference signal before it is submitted to the filter circuit to reduce the input-referred thermal noise by a factor of approximately the gain of the amplification; and a ΣΔ modulator using such a filter.

REFERENCES:
patent: 5805093 (1998-09-01), Heikkila et al.
patent: 5973518 (1999-10-01), Vallancourt
patent: 6285311 (2001-09-01), Lewicki
patent: 6288664 (2001-09-01), Swanson
patent: 6304608 (2001-10-01), Chen et al.

Affiliated with

Also associated with

Rating

Filter system with reduced switch thermal noise and a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Filter system with reduced switch thermal noise and a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter system with reduced switch thermal noise and a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3450298