Title of the patent family | Family |
Multiple-input and multiple-output amplifier | P30 |
Multiple-input and multiple-output amplifier using mutual induction in the feedback network | P33 |
Method and device for radio reception using a plurarity of antennas | P34 |
Multiple-input and multiple-output amplifier having pseudo-differential inputs | P41 |
Item ID | Jurisdiction | Application No. | Filing date | Patent or PCT publ. No. | Issue Date | Family |
P30-A | France | 06/00388 | 17 Jan 2006 | FR 0600388 | 31 Oct 2008 | P30 |
P30-B | PCT | PCT/IB2006/003950 | 19 Dec 2006 | WO 2007/083191 | N/A | |
P30-C | USA | 12/096,701 | 9 Jun 2008 | US 7,642,849 | 5 Jan 2010 | |
P33-A | France | 06/05633 | 23 Jun 2006 | FR 0605633 | 29 Aug 2008 | P33 |
P33-B | PCT | PCT/IB2007/001344 | 26 Apr 2007 | WO 2008/001168 | N/A | |
P33-C | USA | 12/301,929 | 21 Nov 2008 | US 7,940,119 | 10 May 2011 | |
P34-A | France | 06/06502 | 18 Jul 2006 | FR 0606502 | 28 Nov 2008 | P34 |
P34-B | PCT | PCT/IB2007/001589 | 5 Jun 2007 | WO 2008/010035 | N/A | |
P34-C | USA | 12/301,952 | 21 Nov 2008 | US 7,983,645 | 19 July 2011 | |
P41-A | France | 08/03982 | 11 Jul 2008 | FR 0803982 | 28 Oct 2011 | P41 |
P41-B | PCT | PCT/IB2009/051358 | 31 Mar 2009 | WO 2010/004445 | N/A | |
P41-C | USA | 12/955,381 | 29 Nov 2010 | US 7,952,429 | 31 May 2011 |
The patent families P30, P33, P34 and P41 may be applied to wireless receivers using multiple antennas such as the one used in multiple-input and multiple-output (MIMO) radio transmission schemes used in cellular network and WLANs. The combination of these inventions is useful for designing more compact wireless communication systems, because it can be used to reduce the distance between the antennas. For instance, more antennas may be packed into a mobile phone or laptop, to obtain more bandwidth. These inventions may be applied to all standards implementing MIMO radio transmission. They are not intended for a particular standard, because they apply to the analog section of a receiver and may provide a higher SNR and lower signal correlations in all MIMO systems. However, the MIMOmatch-A portfolio is most useful for standards using a large number of antennas, such as 3GPP LTE-Advanced (LTE-A) and IEEE 802.11ac, which include 8x8 MIMO configurations.
In addition to their own merits, these inventions may also be used to avoid infringing (or paying royalties for) patents relating to wireless receivers for MIMO transmission using multiple independent single-input and single-output (SISO) front-ends. A short presentation of the application of these inventions to wireless transmission is available at Section 3 of this page. Several peer-reviewed technical articles published on this subject may be downloaded here. In most cases, these inventions require no added circuit element compared to a conventional design. Improving the performance of radio receivers using these inventions is one of the way of making wireless communication networks more energy efficient.
It is also important to observe that chip manufacturers might be unable to avoid infringing P33 as soon as they start packing several low noise amplifiers (LNAs) into the same chip to achieve cost reduction. For instance, if a single CMOS chip contains the front-end of a radio receiver for MIMO transmission, multiple LNAs each using a source degeneration inductor are built at a small distance from one another. This configuration is likely to be covered by P33, even if the inductive coupling between the degeneration inductors is not intentionally created to implement P34.
The patent families P30, P33 and P41 may also be applied to the ZXtalk and ZXnoise techniques for the reduction of crosstalk and echo in electrical interconnections such as the one used in a system in package (SiP), a multi-chip module (MCM) or a printed circuit board (PCB). This specialized field of R&D is very active in the semiconductor industry. Explanations relating to this important application may be found in the technical articles [B66] and [B77] of Excem, which can be downloaded here. Excem also offers two Seminars and a free electronic book presenting the technical background for assessing and implementing this technology.
For a conference with technical experts, please contact us. We can also provide several reports relating to these inventions.
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