Title:
FILTERING DEVICE AND METHOD WITH OUT-OF-BAND ATTENUATION
Document Type and Number:
WIPO Patent Application WO2004028006
Kind Code:
A3
Abstract:
The invention relates to a filtering device with out-of-band attenuation. The inventive device comprises at least two series-mounted filters with high near selectivity (Fsaw1, Fsaw2). Each of said filters has a pre-determined insertion loss and attenuation and is mounted in series with an amplifier (Amp3, Amp4). The invention is characterised in that the gain of the amplifier is adapted to the insertion loss and the attenuation of the filter with which it is associated.
Inventors:
RENARD ALAIN (FR)
KIRBY ESTELLE (FR)
KIRBY ESTELLE (FR)
Application Number:
PCT/FR2003/002768
Publication Date:
April 22, 2004
Filing Date:
September 19, 2003
Export Citation:
Assignee:
THALES SA (FR)
RENARD ALAIN (FR)
KIRBY ESTELLE (FR)
RENARD ALAIN (FR)
KIRBY ESTELLE (FR)
International Classes:
H04B1/18; H04B1/28; (IPC1-7): H04B1/28; H04B1/18
Foreign References:
| US6219531B1 | 2001-04-17 | |||
| US6256511B1 | 2001-07-03 | |||
| US5537676A | 1996-07-16 | |||
| US6229479B1 | 2001-05-08 |
Other References:
ANEMOGIANNIS K ET AL: "Cordless phone system architectures based on SAW filters", ULTRASONICS SYMPOSIUM, 1993. PROCEEDINGS., IEEE 1993 BALTIMORE, MD, USA 31 OCT.-3 NOV. 1993, NEW YORK, NY, USA,IEEE, 31 October 1993 (1993-10-31), pages 85 - 88, XP010114963, ISBN: 0-7803-1278-3
Download PDF:
Previous Patent: METHOD FOR DECODING DATA USING WINDOWS OF DATA
Next Patent: WATERTIGHT CASE FOR MOBILE ELECTRONIC DEVICES
Next Patent: WATERTIGHT CASE FOR MOBILE ELECTRONIC DEVICES