Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2004-11-04
2009-06-30
Phan, Tri H (Department: 2416)
Multiplex communications
Duplex
Transmit/receive interaction control
C370S293000, C379S406010, C455S570000
Reexamination Certificate
active
07554933
ABSTRACT:
An echo cancellation apparatus of a transceiver in a full duplex communication system is disclosed. The full duplex communication system includes a transmitter section for transmitting a transmit signal and a receiver section for receiving a receive signal. The echo cancellation device includes an echo cancellation signal generator coupled to the transmitter section for receiving the transmit signal and for generating an echo cancellation signal according to the transmit signal, a load resistor and a parasitic capacitor of the transceiver; and a calculation module coupled to the transmitter section, the receiver section, and the echo cancellation signal generator for receiving the receive signal and for eliminating at least high frequency components of the echo signal.
REFERENCES:
patent: 5528687 (1996-06-01), Tanaka
patent: 5694474 (1997-12-01), Ngo et al.
patent: 5812537 (1998-09-01), Betts et al.
patent: 5960077 (1999-09-01), Ishii et al.
patent: 6278785 (2001-08-01), Thomasson
patent: 6373908 (2002-04-01), Chan
patent: 6775529 (2004-08-01), Roo
patent: 6947478 (2005-09-01), Hauptmann et al.
patent: 6965578 (2005-11-01), Kappes
patent: 6980644 (2005-12-01), Sallaway et al.
patent: 7139342 (2006-11-01), Phanse
patent: 7304961 (2007-12-01), Huang et al.
patent: 7307965 (2007-12-01), Huang et al.
patent: 7457386 (2008-11-01), Phanse
patent: 2002/0101983 (2002-08-01), Lee
patent: 2003/0169875 (2003-09-01), Lee et al.
patent: 2003/0214903 (2003-11-01), Lee
patent: 2005/0084003 (2005-04-01), Duron et al.
patent: 318989 (1997-11-01), None
patent: 507433 (2002-10-01), None
“15MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output,” , Harris Semiconductor, Sep. 1998, pp. 1, 4, CA3130, CA3130A, No. 817.4., Harris Corporation 1998.
Huang Chen-Chih
Huang Chih-Wen
Hsu Winston
Phan Tri H
Realtek Semiconductor Corp.
LandOfFree
Echo cancellation device for full duplex communication systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Echo cancellation device for full duplex communication systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Echo cancellation device for full duplex communication systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4078240