Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2006-02-16
2010-06-01
Nguyen, Duc M (Department: 2618)
Telecommunications
Transmitter
Noise or interference elimination
C455S114300, C455S239100, C330S296000, C330S287000
Reexamination Certificate
active
07729667
ABSTRACT:
A linearizer for reducing intermodulation distortion in a non-linear device. The novel linearizer includes an input port for receiving a signal from the device and a circuit for effecting gain expansion on the signal that counteracts a gain compression of the device. In an illustrative embodiment, the circuit includes a starved limiter in shunt with the device, implemented using a pair of biased diodes D1and D2. The first diode D1is connected to ground and the second diode D2is coupled to the signal. In an alternate embodiment, the linearizer also includes a second pair of biased diodes D3and D4, D3connected to ground and D4coupled to the signal, and a plurality of reactive elements for increasing the operational bandwidth of the linearizer.
REFERENCES:
patent: 3763380 (1973-10-01), Homer et al.
patent: 4152733 (1979-05-01), Melwisch
patent: 4682346 (1987-07-01), Faith et al.
patent: 5138275 (1992-08-01), Abbiati et al.
patent: 5204637 (1993-04-01), Trinh
patent: 5278996 (1994-01-01), Shitara
patent: 5523716 (1996-06-01), Grebliunas et al.
patent: 5673001 (1997-09-01), Kim et al.
patent: 6281748 (2001-08-01), Klomsdorf et al.
patent: 6307436 (2001-10-01), Hau
patent: 6333677 (2001-12-01), Dening
patent: 6486739 (2002-11-01), Luo
patent: 6864742 (2005-03-01), Kobayashi
patent: 6973288 (2005-12-01), Davis et al.
patent: 7345547 (2008-03-01), Wang et al.
patent: 7348843 (2008-03-01), Qiu et al.
patent: 7420416 (2008-09-01), Persson et al.
patent: 7557654 (2009-07-01), Noto et al.
patent: 2001/0040483 (2001-11-01), Dening et al.
patent: 2005/0140439 (2005-06-01), Hyoung et al.
patent: 2009/0174475 (2009-07-01), Yuen et al.
Christie Parker & Hale LLP
Nguyen Duc M
Raytheon Company
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