Title of Invention

A WIRELESS COMMUNICATIONS TRANSMITTER CIRCUIT

Abstract A wireless transceiver includes a transmitter having a harmonic rejection mixer and an RF output phase-locked loop in a two step up-conversion architecture, and a direct conversion receiver. The transmitter includes a local oscillator for producing a signal at a multiple of an intermediate frequency, a quadrature modulator harmonic rejection mixer responsive to the signal at the multiple of the intermediate frequency for modulating in-phase and quadrature-phase base-band signals to produce an intermediate frequency signal, a switchable signal responsive to the intermediate frequency signal for producing a filtered intermediate frequency signal, and an RF output offset phase-locked loop responsive to the filtered intermediate frequency signal and the signal at the multiple of the intermediate frequency for producing an RF transmission signal. The harmonic rejection mixer reduces filtering requirements to facilitate a high level of circuit integration while the output offset phase-locked loop reduces the power consumption. TheThe switchability of the filter allows the utilisation of the transceiver for EGSM, DCS and PCS communication. The local oscillator may use a integer or fractional-N phase-locked loop.
Full Text

Documents:

1615-CHENP-2004 AMANDED CLAIMS 01-12-2009.pdf

1615-CHENP-2004 ASSIGNMENT 01-12-2009.pdf

1615-CHENP-2004 CORRESPONDENCE OTHERS 01-12-2009.pdf

1615-CHENP-2004 DRAWINGS 01-12-2009.pdf

1615-CHENP-2004 FORM-2 01-12-2009.pdf

1615-CHENP-2004 FORM-3 01-12-2009.pdf

1615-CHENP-2004 OTHER PATENT DOCUMENT 01-12-2009.pdf


Patent Number 241252
Indian Patent Application Number 1615/CHENP/2004
PG Journal Number 27/2010
Publication Date 02-Jul-2010
Grant Date 25-Jun-2010
Date of Filing 21-Jul-2004
Name of Patentee QUALCOMM INCORPORATED
Applicant Address 5775 Morehouse Drive, San Diego, CA 92121
Inventors:
# Inventor's Name Inventor's Address
1 SEE, Andrew 5775 Morehouse Drive, San Diego, CA 92121
2 SZABO, Sandor 5775 Morehouse Drive, San Diego, CA 92121
3 JAFFEE, James 738 Seabright Lane, Solana Beach, CA 92075
4 MOLLENKOPF, Steven 4790 Tarantella Lane, San Diego, CA 92130
PCT International Classification Number H03C3/09
PCT International Application Number PCT/US2003/002476
PCT International Filing date 2003-01-27
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10/350,407 2003-01-24 U.S.A.
2 60/351,869 2002-01-25 U.S.A.