Active continuous-time filter with increased dynamic range...

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

Reexamination Certificate

active

06873205

ABSTRACT:
An active filter (100) is disclosed with improved blocker signal rejection characteristics. Linear resistors, such as fixed value resistors (3, 4) are used at the input stage (72) of the filter (100) to suppress any blocker signal. A gain compensation stage (57) is added to the output stage (23) using resistors (24) fabricated with the same technology used to fabricate the input resistors (3, 4) in order to offset any gain changes associated with the input fixed value resistors (3, 4). In an exemplary embodiment, the fixed value resistors (3, 4) are fabricated using polysilicon.

REFERENCES:
patent: 4604568 (1986-08-01), Prieto
patent: 4691171 (1987-09-01), Van Roermund et al.
patent: 4823092 (1989-04-01), Pennock
patent: 4839542 (1989-06-01), Robinson
patent: 4926139 (1990-05-01), Anderson et al.
patent: 5081423 (1992-01-01), Koyama et al.
patent: 5736909 (1998-04-01), Hauser et al.
patent: 5966046 (1999-10-01), Bezzam et al.
patent: 6046632 (2000-04-01), Straw
patent: 6112125 (2000-08-01), Sandusky
patent: 6268765 (2001-07-01), Goplnathan et al.
patent: 6404278 (2002-06-01), Allen et al.
FA 10.6: “Baseband Filters for IS-95 CDMA Receiver Applications Featuring Digital Automatic Frequency Tuning” by Haideh Khorramabadi, Maurice J. Tarsia, Nam S. Woo, 1996 IEE Int'l. Solid State Circuits Conference p. 172.
“A 2.7-V, 200-kHz, 49-dBm, Stopband-IIP3, Low-Noise, Fully Balanced Gm-C Filter IC” by Tetsuro Itakura et al., IEEE Journal of Solid-State Circuits, vol. 34, No. 8, Aug. 1999.
“Fully Integrated Active RC Filters in MOS Technology” by Mihal Banu and Yannis Tsividis, IEEE Journal of Solid-Stae Circuits, vol. SC-18, No. 6, Dec. 1983.
“Highly-Linear Canonical MOSFET-Capacitor Filters” by Takagit et al., The Transactions of the IEJCE, vol. E71, No. 6 Jun. 1988.
“An Elliptic Continuous-Time CMOS Filter with On-Chip Automatic Tuning” by Mihai Banu and Yannis Tsividis, IEEE Journal of Solid-State Circuits, vol. SC-20, No. 6, Dec. 1985.
“CMOS operational transresistance amplifier for analog signal processing” by Salama and Soliman, Microelectronics Journal, 30 (1999) 235-245.
“High-Frequency CMOS Continuous-Time Filters” by Khorramabadi and Gray, IEEE Journal of Solid-State Circuits, vol. SC-19, No. 6, Dec. 1984.
“A Realization of a High-Frequency Monolithic Integrator with Low Power Dissipation and Its Application to an Active RC Filter” by Matsumoto and Ishibashi, IEICE Trans Fundamentals, vol. E79-A, No. 2 Feb. 1996.

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

Active continuous-time filter with increased dynamic range... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Active continuous-time filter with increased dynamic range..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active continuous-time filter with increased dynamic range... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3398681

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