Telecommunications – Transmitter
Reexamination Certificate
2011-05-24
2011-05-24
Nguyen, Simon D (Department: 2618)
Telecommunications
Transmitter
C455S118000, C455S323000, C455S333000, C327S355000
Reexamination Certificate
active
07949313
ABSTRACT:
A conversion device (CD) is dedicated to conversion of baseband analog I/Q input signals into RF signals in a transmitting path of a wireless communication equipment. This device (CD) comprises i) first (PP1) and second (PP2) processing paths each comprising i1) an input node (IN1, IN2) receiving an input signal (I/Q), i2) an input path (IP1, IP2) connected to the input node and delivering an input current representative of the input signal (I/Q), i3) an amplification means (A1, A2) having first and second inputs fed with the input current and a common-mode current and outputting an amplified signal, and i4) a transconductor (T1, T2) delivering first and second currents from the amplified signal, the first current feeding a negative feedback path connected to the first input of the amplification means and being essentially equal to the input current, and the second current being a chosen scaled copy of the first current and representative of a voltage difference between the input signals (I/Q), H) a common-mode input path (CIP) connected to the input nodes (IN1, IN2) and delivering the common-mode current from the input signals (I/Q) to feed the second input of each amplification means (A1, A2), and iii) a switch core (SC) for mixing the second current delivered by a chosen one of the transconductors (T1, T2) with a local oscillator RF carrier to deliver output RF signals representative of the input signals (I/Q).
REFERENCES:
patent: 6342804 (2002-01-01), Havens et al.
patent: 7027783 (2006-04-01), Vilhonen et al.
patent: 7194242 (2007-03-01), Tanaka et al.
patent: 7280815 (2007-10-01), Pellat et al.
patent: 7715836 (2010-05-01), Vassiliou et al.
patent: 2002/0131389 (2002-09-01), Boesch et al.
patent: 2004/0157568 (2004-08-01), Asam
patent: 08-023231 (1996-01-01), None
patent: 2001-358537 (2001-12-01), None
Japanese Office Action with English translation for application No. 2007-546249, mailed Aug. 13, 2010, 4 pages.
Comte Renaud
Ridgers Timothy John
Hogan & Lovells US LLP
Kubida William J.
Meza Peter J.
Nguyen Simon D
ST-Ericsson SA
LandOfFree
Direct conversion device with compensation means for 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 Direct conversion device with compensation means for a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct conversion device with compensation means for a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2701709