Front end filter circuitry for a dual band GSM/DCS cellular phon

Details Front end filter circuitry for a dual band GSM/DCS cellular phon Front end filter circuitry for a dual band GSM/DCS cellular phon

1998-03-06

2000-09-26

Nguyen, Lee

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455 46, 455 47, 455202, 455203, 455307, 455 323, 455334, 455553, 329308, H04B 118, H04B 7185

Patent

active

061252719

ABSTRACT:
A front end circuit for an RF dual band GSM/DCS phone includes a first channel including an elliptical high-pass filter, a first SAW filter, and a low noise amplifier and a second channel including a second SAW filter and a second low noise amplifier. The output of each channel is alternately switchable to a single-side band mixer circuit. This front end circuit arrangement provides significantly reduced cost and part count over other approaches.

REFERENCES:
patent: 4485383 (1984-11-01), Maher
patent: 5179731 (1993-01-01), Trankle et al.
patent: 5212825 (1993-05-01), Layton
patent: 5249138 (1993-09-01), Piety, Jr. et al.
patent: 5293170 (1994-03-01), Lorenz et al.
patent: 5343168 (1994-08-01), Guthrie
patent: 5926751 (1999-07-01), Vlahos et al.
patent: 5966053 (1999-10-01), Durig et al.
Preliminary Specification entitled, Image Rejecting Front-End for GSM Applications, UAA2073M, by Philips Semiconductors, Jul. 7, 1995, pp. 226-236.
Preliminary Specification entitled, SA1920 PCS/Cellular Dual-Band RF Front-End, by Philips Semiconductors, Aug. 1, 1997.
UHF Technology For The Cordless Revolution, 8140 Electronics World + Wireless World 99 (1993) Jul., No. 1688, Sutton, Surrey, GB.

Affiliated with

Also associated with

Rating

Front end filter circuitry for a dual band GSM/DCS cellular phon does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Front end filter circuitry for a dual band GSM/DCS cellular phon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Front end filter circuitry for a dual band GSM/DCS cellular phon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2107719